Journal articles: 'AZ80 magnesium alloy'

1

Pasang, Timotius, V. Satanin, M. Ramezani, M. Waseem, Thomas Neitzert, and O. Kamiya. "Formability of Magnesium Alloys AZ80 and ZE10." Key Engineering Materials 622-623 (September 2014): 284–91. http://dx.doi.org/10.4028/www.scientific.net/kem.622-623.284.

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Formability of two magnesium alloys, namely, AZ80 and ZE10, has been investigated. Both alloys were supplied with a thickness of 0.8 mm. The grain structure of the as-received AZ80 alloy showed dislocations, twins and second-phase particles and-/or precipitates distributed uniformly within grains. These were not obvious on the ZE10 alloy. The investigations were carried out at room temperature for both alloys in the as-received and heat treated conditions (410oC for 1 hour followed by water quench). The heat treatment significantly changed the grain structure of the AZ80 alloy, but did not affect the ZE10 alloy apart from grain enlargement. The formability was studied on the basis of plastic strain ratio (r) and strain hardening coefficient (n) by means of tensile testing. In the as-received condition, the ZE10 alloy had a slightly better formability () than AZ80 alloy. Following heat treatment, however, the formability of the AZ80 alloy was improved significantly (by about 26%), while the ZE10 alloy did not show any significant change.

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Wu, Zhi Lin, Duo Xiang Wu, Ren Shu Yuan, Lei Zhao, and Yan Bao Zhao. "Electrochemical Corrosion Behavior of AZ80 Magnesium Alloy Tube Fabricated by Hydrostatic Extrusion." Applied Mechanics and Materials 624 (August 2014): 77–81. http://dx.doi.org/10.4028/www.scientific.net/amm.624.77.

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The corrosion behavior of hydrostatic extruded tube AZ80 magnesium alloy was investigated by polarization curves and electrochemical impedance spectroscopy (EIS) in simulated atmosphere. The results indicated that, the corrosion resistance of the hydrostatic extruded AZ80 magnesium alloy with uneven deformed grains and increased sub-grains were obviously weakened, with larger corrosion current density in the polarization curves and lower corrosion resistances in the electrochemical impedance spectroscopy plots. This was mainly because of the hydrostatic extrusion which made AZ80 magnesium alloy within large numbers of dislocation tangles. So the residual stress increased the electrochemical activity of magnesium alloy which reduced the corrosion resistance of magnesium alloys.

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Zhu, Li Ping, Yu Jin Zhu, Chao Lun Wang, Chuang Lu, Xiao Zu Fang, and Xue Jun Cao. "Atmospheric Corrosion of AZ80 Magnesium Alloy." Applied Mechanics and Materials 496-500 (January 2014): 331–35. http://dx.doi.org/10.4028/www.scientific.net/amm.496-500.331.

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The atmospheric corrosion behaviors of AZ80 magnesium alloy are investigated by exposure test in different testing sites. After four months exposure test, the corrosion morphologies and the component of the corrosion products were observed by the scanning electron microscopy (SEM) equipped with energy-dispersive analysis of X-ray (EDAX). The corrosion rates of AZ80 magnesium alloys were calculated by mass-loss. The results indicated that the corrosion resistance of AZ80 magnesium alloy in the sea environment is the worst. The corrosion degree of the back surface is worse than the front side. The corrosion products are mainly formed by carbonate, and contain small amount of chloride in most environments, while in Xishuangbanna and Jiangjin area contain a little sulfate.

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Cai, Gang Yi, Xiao Ting Huang, and Peng Hui Deng. "Effects of Thermomechanical Treatment Process on the Microstructure and Properties of AZ80 Magnesium Alloy." Advanced Materials Research 179-180 (January 2011): 354–58. http://dx.doi.org/10.4028/www.scientific.net/amr.179-180.354.

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Thermomechanical treatment was adopted to improve the comprehensive performance of AZ80 magnesium alloys in this paper. The influence of varying the thermal processing parameters and deformation on the microstructure and mechanical properties of AZ80 magnesium alloy was studied, and the optimal process of themomechanical treatment was obtained. The experimental results show that the hardness increased with the increasing of deformation and the hardness is up to the peak value with 30% deformation. After aging, the hardness measurements and microstructure analysis results show that the hardness increased with increasing aging temperature, and reached the peak value at temperature 170°C, while the hardness decreased sharply when the temperature goes beyond 170°C. After thermomechanical treatment, the grains of AZ80 magnesium alloy became uniform and fine. The roles of both deformation strengthening and dispersion strengthening were to improve the mechanical property of AZ80 magnesium alloy.

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Zhang, Zhi Qiang, Qi Chi Le, and Jian Zhong Cui. "Effect of Physical Fields on Solidification Structures of DC Casting AZ80 Magnesium Alloy Billets." Applied Mechanics and Materials 105-107 (September 2011): 1616–19. http://dx.doi.org/10.4028/www.scientific.net/amm.105-107.1616.

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AZ80 magnesium alloy was semi-continuously cast under different physical fields which were conventional direct chill (DC) casting, low frequency electromagnetic casting (LFEC), ultrasonic casting (USC) and electromagnetic-ultrasonic combined casting (ECUC), respectively. The effect of different physical fields on solidification structures of AZ80 alloys was investigated. The results show that compared with the conventional DC casting, structures of AZ80 alloys billets cast with LFEC and USC have been greatly refined. The effective refinement takes place in the edge of billets when LFEC is applied. However, the effective refinement takes place in the center of billets when USC is applied. When combination of low frequency electromagnetic and ultrasonic fields is applied during semi-continuous casting AZ80 magnesium alloy billet, structures of AZ80 alloys are refined significantly in the whole billets everywhere and more uniform.

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Xu, Hong Yan, Sen Chang, Xing Zhang, and Zhi Min Zhang. "Study of Aluminum Coating Thermally Sprayed on AZ80 Magnesium Alloy Surface." Materials Science Forum 686 (June 2011): 319–24. http://dx.doi.org/10.4028/www.scientific.net/msf.686.319.

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Aluminum (Al) coating was thermally sprayed on the surface of AZ80 magnesium (Mg) alloy. The Al-coating was deformed at 400°C with different deformation degrees of 15%, 30%, 45%, 60% and 80%. The corrosion properties of the AZ80 Mg alloys coated with Al-coatings were studied by potentiodynamic and galvanic tests in 3.5% NaCl solution; the adhesion strengths between Al-coatings and AZ80 substrate were also measured simultaneously by tensile test. The results showed that, Al-coating could decrease the corrosion rate of AZ80 Mg alloys, and the corrosion rate was related not only with the density of Al-coating but also with the adhesion strength of Al-coating. Before the formation of dense Al-coating, the corrosion rate of Al-coated AZ80 Mg alloys decreased with the increasing of bonding strength of Al-coating; after the formation of dense Al-coating, the corrosion rate of Al-coated AZ80 Mg was mainly determined by the structure of Al-coating. It was also revealed that with the increasing of deformation degree, the corrosion rate of the Al-coated AZ80 Mg alloys first decreased then increased, while the adhesion strength increased gradually. The corrosion rate of AZ80 Mg alloy coated with 60% deformed Al-coating was the lowest, which was only 19% of that of the AZ80 substrate.

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7

Huang, Xiao Ting, Gang Yi Cai, and Wen Biao Qiu. "Effects of Hot Deformation Process on the Microstructure and Hardness of AZ80 Magnesium Alloy." Advanced Materials Research 476-478 (February 2012): 46–49. http://dx.doi.org/10.4028/www.scientific.net/amr.476-478.46.

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AZ80 magnesium alloys were deformed at different temperature (270°C, 300°Cand 330°C)with different deformation ratio from 10% to 50%. The influence of varying the deformation temperature and ratio on the microstructure and hardness of AZ80 magnesium alloy was studied. The experimental results show that the hardness increased with the increasing of deformation and the hardness is up to the peak value with 40% deformation at 300°C. The microstructure was homogeneous and the grain was refined after hot deformation.The roles of both deformation strengthening and dispersition strengthening were to im prove the mechanical property of AZ80 magnesium alloy.

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8

Deng, Peng Hui, Tie Cheng Li, and Gang Yi Cai. "Effects of Solution and Ageing Treatment Process on the Microstructure and Properties of AZ80 Magnesium Alloy." Advanced Materials Research 239-242 (May 2011): 238–42. http://dx.doi.org/10.4028/www.scientific.net/amr.239-242.238.

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In this study, the comprehensive performance of AZ80 magnesium alloy was improved by solution treatment and multi-step ageing treatment. The effects of different thermal processing parameters on the microstructure and mechanical properties of AZ80 magnesium alloy were studied. The experimental results show that the optimal process of solution treatment for AZ80 alloy is heated at 420°C for 5h, which the β phase dissolve thoroughly into the α substrate. After first-stage ageing treatment, the hardness of samples varied as the ageing temperature, and had higher hardeness at temprature 180°C. While in the second-stage ageing treatment, the sample got the ageing peak value at 210°C for 10h. After two-stage treatment, the grains of AZ80 magnesium alloy became homogeneous and fine, and the second phase distributes along the grain boundary and plays an important role of dispersion strengthening. Above all, the optimal heat treatment process of AZ80 magnesium is solution treated at 420°C for 5h, as well as ageing at 180°C, 4h and 210°C, 10h.

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9

Wu, Y. J., Zhi Min Zhang, X. Zhang, Qiang Wang, and B. C. Li. "Effect of Deformation Condition on the Mechanical Behavior of AZ80 Magnesium Alloy." Materials Science Forum 628-629 (August 2009): 529–34. http://dx.doi.org/10.4028/www.scientific.net/msf.628-629.529.

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With the deformation temperature between 250°C and 450°C as well as the strain rate between 0.01s-1 and 5s-1, the hot compression tests of AZ80 magnesium alloy were performed on Gleeble-3800 thermal simulation testing machine, so as to seek out the responses of mechanical behavior of AZ80 magnesium alloy under different deformation conditions. The results indicated that AZ80 magnesium alloy shows dynamical recrystallization when hot compessed, the recrystallization is prone to happen and the stress peak decreases with the temperature increased, and the critical strain to produce the transformation of recrystallization augments with the strain rate increased.

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10

Wang, Fang, and Zhong Tang Wang. "Thermal Deformation Property and Constitutive Model of AZ80 Magnesium Alloy." Advanced Materials Research 712-715 (June 2013): 674–77. http://dx.doi.org/10.4028/www.scientific.net/amr.712-715.674.

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Thermal Deformation Property and Constitutive Model of AZ80 Magnesium Alloy had been studied with thermal simulation experiment. Dynamic recrystallization for AZ80 magnesium alloy had occurred under different strain rate at 583K(310°C). Dynamic recrystallization had occurred more completely and the grain size was reducing with increasing of strain rate. Dynamic recrystallization had occurred more completely and the grain size was reducing with increasing of strain rate. According the Arrhenius equation, a kind of constitutive equation of AZ80 Magnesium alloy which considered the strain had been put forward, and the relative errors between calculation results by the stress-strain model and experiment results are less than 10.5%.

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11

Przondziono, Joanna, Witold Walke, and Eugeniusz Hadasik. "Galvanic Corrosion Test of Magnesium Alloys after Plastic Forming." Solid State Phenomena 191 (August 2012): 169–76. http://dx.doi.org/10.4028/www.scientific.net/ssp.191.169.

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The purpose of this study was to evaluate resistance to galvanic and crevice corrosion of magnesium alloys AZ61 and AZ80. Resistance to galvanic corrosion was evaluated with additional application of aluminium alloy 2017A and 8Mn2Si steel as reference materials. The tests were carried out by means of potentiostat VoltaLab PGP 201 by Radiometer with application of Evans method. The tests were carried out in the solution with concentration of 0.01 M NaCl in ambient temperature. For comparison, the relations of the surface of magnesium alloys to aluminium alloys and steel (1:1, 5:1 i 10:1) was differentiated in the experiment. It was proved that AZ80 alloy features slightly higher corrosion resistance in contact with aluminium alloy and steel.

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Wu, Fengjing, Xiaojuan Liu, and Xin Xiao. "Corrosion resistance and characterization studies of calcium series chemical conversion film via green pretreatment on magnesium alloy." Anti-Corrosion Methods and Materials 63, no. 6 (November 7, 2016): 508–12. http://dx.doi.org/10.1108/acmm-10-2015-1588.

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Purpose Magnesium alloys, although valuable, are reactive and require protection before its application in many fields. The purpose of this study was to evaluate a novel anticorrosive chemical conversion film on AZ80 magnesium alloy by environmental-friendly calcium series surface pretreatment. Design/methodology/approach The corrosion resistance of the film was evaluated by potentiodynamic polarization and electrochemical impedance spectroscopy in 3.5 Wt.% NaCl solution. The surface morphologies, microstructure and composition of the film were investigated by scanning electron microscopy and energy-dispersive spectroscopy. Findings The corrosion current density of the calcium series film decreased by more than one order of magnitude as compared to that of the AZ80 magnesium alloy. The conversion film presented dry-mud morphology, and its thickness was estimated to be approximately 4 μm. The conversion film was highly hydrophilic, and the organic coating adhesion on treated AZ80 surface was approximately 13.5 MPa. Originality/value Excellent performance of the calcium-based chemical conversion film on Mg alloy was obtained, which does not contain heavy metals or fluorides and completely conforms to European RoHS (Restriction of Hazardous Substances) standard.

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13

Xue, Yong, Zhi Min Zhang, Li Hui Lang, and Li Li. "Influence of Aging on Microstructure and Mechanical Properties of Wrought Magnesium Alloys." Advanced Materials Research 152-153 (October 2010): 560–65. http://dx.doi.org/10.4028/www.scientific.net/amr.152-153.560.

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In the present paper a research has been made on the effect of aging on the microstructure and mechanical properties of AZ80 and ZK60 wrought magnesium alloys by virtue of optical microscope, electronic scanning microscope and mechanical testers. The research indicates that both the tensile strength and elongation of AZ80 alloy first increase and then decrease as the aging temperature rises, and that, at 140°C-170°C aging temperature, the alloy has good performances in both tensile strength and elongation, they both reaching their peak values at 170°C aging temperature. It has been proved in these researches that while the hardness of ZK60 alloy first increase and then decrease as the aging temperature rises and that the hardness reaches its peak value at 170°C aging temperature, the impact of toughness of the alloy is just the opposite. ZK60 alloy has good performances in both impact toughness and other properties at 140-200°C aging temperature. Constrastive researches have shown that, at the same aging temperature, ZK60 alloy has a better performance than AZ80 alloy.

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Kannan, M. Bobby, Carsten Blawert, and Wolfgang Dietzel. "Electrochemical Corrosion Behaviour of ZE41 and QE22 Magnesium Alloys." Materials Science Forum 690 (June 2011): 385–88. http://dx.doi.org/10.4028/www.scientific.net/msf.690.385.

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The study suggests that the rare-earths containing magnesium alloys ZE41 and QE22 exhibit a poorer corrosion resistance than the AZ80 magnesium alloy. Electrochemical experiments showed that the two rare-earths containing alloys are highly susceptible to localized corrosion. Post corrosion analysis revealed intergranular and pitting corrosion in ZE41, whereas QE22 alloy underwent only pitting corrosion.

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15

Wang, Zhong Tang, Gen Fa Zhao, Shi Hong Zhang, and Yong Gang Deng. "Constitutive Equation of AZ80 Magnesium Alloy at Thermal Deformation." Applied Mechanics and Materials 148-149 (December 2011): 762–65. http://dx.doi.org/10.4028/www.scientific.net/amm.148-149.762.

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The curves of true stress-strain of AZ80 Magnesium alloy had been tested with thermal simulation experiment, at the conditions of the experimental temperature being 260°C~ 410°C, and strain-rate being 0.001~ 10s-1, and the deformation degree being 50％. According the Arrhenius equation, a kind of constitutive equation of AZ80 Magnesium alloy which considered the strain had been put forward, and the relative errors between calculation results by the stress-strain model and experiment results are less than 10.5%.

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Xue, Yong, Zhi Min Zhang, and Yao Jin Wu. "A Study on Processing Map and Flow Stress Model of AZ80 Magnesium Alloy Forming at Elevated Temperature." Applied Mechanics and Materials 121-126 (October 2011): 3–9. http://dx.doi.org/10.4028/www.scientific.net/amm.121-126.3.

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Quantities AZ80 magnesium alloy billets were compressed with 60% height reduction on hot process simulator at 200,250,300,350,400,450°C under strain rates of 0.001, 0.01, 0.1,1 and 10s-1.The processing maps based on the Dynamic Material Modeling (DMM) were constructed, which is useful to analyze the deformation mechanism and the destabilization mechanism of AZ80 alloy. If the mechanical property of AZ80 alloy is taken into consideration, the optimal deformation processing parameters from the processing maps are the deformation temperatures ranging from 300 to 350°C and strain rates ranging from 0.001 to 0.01s-1. Meanwhile, a flow stress model with eight parameters is used to characterize the dynamic recrystallization strain softening of AZ80 alloy.

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Wang, Zhong Tang, Shi Hong Zhang, Guang Xia Qi, and Rong Hui Chang. "Tailor-Welded Blanks Manufactured and Stamping Properties of Magnesium Alloy." Advanced Materials Research 148-149 (October 2010): 241–44. http://dx.doi.org/10.4028/www.scientific.net/amr.148-149.241.

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Magnesium alloy tailor-welded blanks(MTWBs) of AZ31 and AZ80 sheet had been manufactured by gas tungsten arc welded(GTAW), which the thickness were 0.8mm. The welding properties of Magnesium alloy sheet had been analyzed, and the technology parameters of GTAW were determined by experiment study, which was that welding thread being Φ2.0mm, welding electricity 50A, welding voltage 9V, welding rate 12—13cm/min. The research results presented that the grain in welded seam was isometric crystal, and the grains were branching crystal in heat-affected zone (HAZ). For MTWBs of AZ31and AZ80 sheet which the thickness was 0.8mm, the forming parameters were that the forming temperature of AZ31 being 190-220°C, and forming temperature of AZ80 being 310°C-350°C, and the temperature of tools is 180°C~200°C.

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Xue, Hansong, Xinyu Li, Weina Zhang, Zhihui Xing, Jinsong Rao, and FuSheng Pan. "Effect of Bi on Microstructure and Mechanical Properties of Extruded AZ80-2Sn Magnesium Alloy." High Temperature Materials and Processes 37, no. 1 (January 26, 2018): 97–103. http://dx.doi.org/10.1515/htmp-2016-0045.

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AbstractThe effects of Bi on the microstructure and mechanical properties of AZ80-2Sn alloy were investigated. The results show that the addition of Bi within the as-cast AZ80-2Sn alloy promotes the formation of Mg3Bi2 phase, which can refine the grains and make the eutectic phases discontinuous. The addition of 0.5 % Bi within the as-extruded AZ80-2Sn alloy, the average grain size decreases to 12 μm and the fine granular Mg17Al12 and Mg3Bi2 phases are dispersed in the α-Mg matrix. With an increase in Bi content, the Mg17Al12 and Mg3Bi2 phases become coarsened and the grain size increases. The as-extruded AZ80-2Sn-0.5 %Bi alloy has the optimal properties, and the ultimate tensile strength, yield strength and elongation are 379.6 MPa, 247.1 MPa and 14.8 %, respectively.

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Fouad, Yasser, Khaled M. Ibrahim, and Brando Okolo. "Wear Mitigation in Magnesium Alloy AZ80 Processed by Equal Channel Angular Pressing." International Journal of Engineering Research in Africa 6 (November 2011): 1–11. http://dx.doi.org/10.4028/www.scientific.net/jera.6.1.

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First results of the influence of Equal Channel Angular Pressing (ECAP) on the wear behavior of the magnesium alloy AZ80 have been discussed. The evident grain refinement and redistribution of second phases in the 4 pass processed materials resulted in an increase of the hardness state in the AZ80 alloy. Wear tests conducted on a pin-on-disc set-up revealed better wear resistance for the 4 pass processed materials. Isothermal aging treatment, at 210°C for 10 hrs, of the ECAP processed materials showed that wear resistance properties are improved markedly. For incremental sliding speeds during the wear test, wear rate of the AZ80 alloy was found to increase.

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Wu, Yao Jin, Bao Hong Zhang, Yong Biao Yang, and Zhi Min Zhang. "Effects of Homogenizing and Extrusion on Elongation of As-Cast AZ80 Magnesium Alloy." Advanced Materials Research 626 (December 2012): 386–90. http://dx.doi.org/10.4028/www.scientific.net/amr.626.386.

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This paper presents the results of an investigation of the effects of homogenizing heat treatment and extrusion on plasticity of the as-cast AZ80 magnesium alloy. Both the homogenized and non-homogenized billets of AZ80 alloy were forward extruded at several different temperatures and different extrusion ratios. The effects of homogenization and extrusion on plasticity were evaluated by conducting tensile tests on these billets at room temperature and comparing their elongations. The experimental results showed that the elongation of the as-cast AZ80 alloy was increased by 67% after the homogenization treatment. After extrusion, the elongation of both the homogenized and non-homogenized AZ80 alloy increased significantly. The elongation of the homogenized billets decreased gradually with increasing temperature. For the non-homogenized billets, however, the elongation decreased sharply with temperature from 300 to 350 °C and then increased gradually with increasing temperature. There was not clear correlation between the elongations of both the homogenized and non-homogenized billets and the extrusion ratio.

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Sakai, Tetsuo, Yohei Watanabe, and Hiroshi Utsunomiya. "Microstructure and Texture of AZ80 Magnesium Alloy Sheet Rolled by High Speed Warm Rolling." Materials Science Forum 618-619 (April 2009): 483–86. http://dx.doi.org/10.4028/www.scientific.net/msf.618-619.483.

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The present authors have succeeded in single pass large draught rolling of AZ31 and ZK60A magnesium alloy sheet below 200°C without heating rolls by raising the rolling speed above 1000m/min. Maximum reduction attained in single pass rolling was 60%. Among magnesium alloys, AZ31 is known as the most ductile alloy. It remains uncertain whether the high limiting reduction by high speed rolling can be attained in other magnesium alloys that are less ductile but stronger than AZ31. In this study, AZ80A (Mg-8.1%Al-0.63%Zn) sheets with the thickness of 2.7mm cut from the extruded sheets were used. Rolling temperature was varied from RT to 350°C. Rolling speed was 1000m/min. The limiting reduction in thickness increases with rolling temperature, and the maximum reduction of 52% is obtained at 250°C. The fracture surface of sheet rolled at 100°C shows ductile fractured surface, while it shows brittle fracture surface at 350°C. This difference in fracture mode is attributed to the precipitation of -particles at grain boundaries during holding at 350°C before rolling. From this result, high speed rolling can also be an effective tool for improving the rolling deformability of AZ80 sheet. The hardness of the rolled sheets measured on the transverse plane increases with increasing temperature and reduction. The variation of hardness with rolling temperature and reduction indicates the occurrence of dynamic recrystallization (DRX). The sheet rolled at 200°C with the reduction of 50% shows the tensile strength of 353MPa and the elongation of 29%, which is an excellent strength-ductility balance. By applying high-speed rolling process to AZ80 magnesium alloy, we can obtain a remarkable improvement in the material characteristics as well as rolling deformability.

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Bhuiyan, Md Shahnewaz, Youshiharu Mutoh, Tsutomu Murai, and Shinpei Iwakami. "436 Corrosion Fatigue Behavior of Extruded AZ80-T5 magnesium alloy." Proceedings of the Materials and processing conference 2007.15 (2007): 311–12. http://dx.doi.org/10.1299/jsmemp.2007.15.311.

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Qiao, Jun, Yu Wang, Guo Dong Shi, and Bao Xin Nie. "Enhanced Tensile Ductility of AZ80 Magnesium Alloy." Advanced Materials Research 284-286 (July 2011): 1635–38. http://dx.doi.org/10.4028/www.scientific.net/amr.284-286.1635.

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Tensile behaviors of extruded and rolled AZ80 Mg alloy were investigated with elongation-to-failure tensile tests at constant temperatures of 300 °C, 350 °C, 400 °C, and 450 °C, and constant strain rates of 10-2s-1and 10-3s-1. Experimental data show that the material exhibits tensile ductilities of over 100% at 400 °C and 450 °C, featured by long steady state deformation. Microstructure studies show that annealed coarse grains were remained in the gauge region during the tensile tests, and the enhanced tensile ductilities resulted from dislocation creep, other than dynamic recrystallization or grain boundary sliding. Cavity evolution and recrystallized coarse grains near fracture end caused premature failure of the material.

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Tomlinson, P., H. Azizi-Alizamini, W. J. Poole, C. W. Sinclair, and M. A. Gharghouri. "Biaxial Deformation of the Magnesium Alloy AZ80." Metallurgical and Materials Transactions A 44, no. 7 (March 28, 2013): 2970–83. http://dx.doi.org/10.1007/s11661-013-1707-x.

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Wang, Zheng, Jin-Guo Wang, Ze-Yu Chen, Min Zha, Cheng Wang, Shi Liu, and Rui-Fang Yan. "Effect of Ce Addition on Modifying the Microstructure and Achieving a High Elongation with a Relatively High Strength of As-Extruded AZ80 Magnesium Alloy." Materials 12, no. 1 (December 26, 2018): 76. http://dx.doi.org/10.3390/ma12010076.

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Forming magnesium alloys with rare earth elements (La, Gd, Nd, Y, Ce) is a routine method for modifying their microstructure and properties. In the present work, the effect of Ce addition on the microstructure evolution and the mechanical properties of as-extruded Mg-8Al-0.5Zn (AZ80) alloy was investigated. All of the extruded AZ80-xCe (x = 0, 0.2, 0.8 and 1.4 wt %) alloys exhibited equiaxed grains formed by fully dynamic recrystallization, and the grain size of the extruded AZ80 alloy was remarkably reduced by ~56.7% with the addition of 1.4 wt % Ce. Furthermore, the bulk-shaped Al4Ce phase formed when Ce was first added, with the Ce content rising to 0.8 wt % or higher, and Al4Ce particles in both the nano- and micron sizees were well distributed in the primary α-Mg matrix. The area fraction of the Al4Ce particles expanded with increasing Ce content, providing more nuclei for dynamic recrystallization, which could contribute to the grain refinement. The results of the tensile tests in this study showed that Ce addition effectively improved the room temperature formability of the as-extruded AZ80 alloy, without sacrificing strength. The significantly improved mechanical properties were ascribed to excellent grain refinement, weakened texture strength, an increased Schmid factor, and a reduced area fraction of low-angle grain boundaries, all resulting from Ce addition to the as-extruded AZ80 alloy. The contribution of the nano-Al4Ce precipitates on improving the mechanical properties was also discussed in this paper.

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Xue, Yong, Zhi Min Zhang, Yao Jin Wu, and Guang Lu. "A Study on the Phenomenological Constitutive Models of AZ80 and AZ31 Magnesium Alloy Forming at Elevated Temperatures." Advanced Materials Research 328-330 (September 2011): 2394–99. http://dx.doi.org/10.4028/www.scientific.net/amr.328-330.2394.

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Quantities AZ80 and AZ31 magnesium alloy billets were compressed with 60% height reduction on hot process simulator at 150,200,250,300,350,400,450°C under strain rates of 0.001, 0.01, 0.1,1 and 10s-1.A constitutive model with a few parameters is used to characterize the dynamic recrystallization strain softening of AZ80 and AZ31 alloy, which comprehensively reflect the effects of the deformation temperature, strain and strain rate on flow stress.

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Wu, Y. J., Z. M. Zhang, and B. C. Li. "Effect of aging on the microstructures and mechanical properties of AZ80 and ZK60 wrought magnesium alloys." Science of Sintering 42, no. 2 (2010): 161–68. http://dx.doi.org/10.2298/sos1002161w.

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In this paper, the effects of solution and aging on the microstructures and mechanical properties of AZ80 and ZK60 wrought magnesium alloys are investigated by optical microscope, electronic scanning microscope and mechanical testers. The result shows that both the tensile strength and elongation of AZ80 alloy increase firstly and then decrease with the increasing of the aging temperature, the peak values appear when the aging temperature is 170?C. The hardness of ZK60 alloy increases firstly and then decreases with the increasing of the aging temperature, and the hardness reaches its peak value at 170?C. However, the toughness of the alloy is just the opposite. Moreover, ZK60 alloy has good performances in both impact toughness and other properties at the aging temperature from 140 to 200?C.

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Moses, Marie, Johannes Luft, Madlen Ullmann, Ulrich Prahl, and Rudolf Kawalla. "Impact of Initial State during Calibre Rolling: Investigating Microstructure and Mechanical Properties of AZ80 Magnesium Alloy." Materials Science Forum 941 (December 2018): 857–62. http://dx.doi.org/10.4028/www.scientific.net/msf.941.857.

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In order to investigate the effect of rolling on microstructure and mechanical properties of different initial states, cast and extruded magnesium alloy AZ80 bars were rolled in calibre. The microstructural characterization was done by light microscopy. As a result, the initial grain size of the cast AZ80 (66 μm) clearly differs from the extruded bar (13 μm). After 14 passes of hot rolling in calibre, a significant grain refining effect was achieved resulting in grain sizes of 5 μm for the cast and 3 μm for the extruded material. To investigate the mechanical properties in the initial and rolled state, tensile tests of both conditions were conducted at room temperature. Due to grain refining, the tensile strength (162 MPa) and the elongation (3 %) of cast AZ80 increased remarkably during 14 passes of calibre rolling (360 MPa and 19 %). The strengthening effect was also evident for the rolled extruded AZ80. However, the cast material exhibited cracks during calibre rolling due to its inexpedient microstructure for a high deformation calibre. On the contrary, the extruded AZ80 was easily deformable. This shows the clear impact of initial states on aspired end properties of processed materials. Future investigations will deal with developing a suitable calibration for cast AZ80.

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Japan Magnesium Association and Committee Of MWT. "Mechanical properties of extruded AZ80 magnesium alloy billets." Journal of Japan Institute of Light Metals 38, no. 12 (1988): 807–10. http://dx.doi.org/10.2464/jilm.38.807.

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Singh, Kamal Kant, Siddharth Singh Yadav, and Sakshi Singh. "Vibration Ability of Sand Cast Magnesium Alloy AZ80." RIET-IJSET: International Journal of Science, Engineering and Technology 4, no. 2 (2017): 81. http://dx.doi.org/10.5958/2395-3381.2017.00009.0.

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ZHANG, Zhi-min, Hong-yan XU, and Bao-cheng LI. "Corrosion properties of plastically deformed AZ80 magnesium alloy." Transactions of Nonferrous Metals Society of China 20 (July 2010): s697—s702. http://dx.doi.org/10.1016/s1003-6326(10)60565-1.

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32

LI, Hui-zhong, Xiao-yan WEI, Jie OUYANG, Jun JIANG, and Yi LI. "Hot deformation behavior of extruded AZ80 magnesium alloy." Transactions of Nonferrous Metals Society of China 23, no. 11 (November 2013): 3180–85. http://dx.doi.org/10.1016/s1003-6326(13)62850-2.

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33

Takayama, Yoshimasa, Itsuki Takeda, Toshiya Shibayanagi, Hajime Kato, and Kunio Funami. "Superplasticity in Friction Stir Processed AZ80 Magnesium Alloy." Key Engineering Materials 433 (March 2010): 241–46. http://dx.doi.org/10.4028/www.scientific.net/kem.433.241.

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Superplasticity in an AZ80 magnesium alloy subjected to friction stir processing (FSP) has been investigated. FSP was carried out at two traveling speeds of 150mm/min and 300mm/min for grain refinement. Optical microscopy on cross section to processing direction revealed obvious differences in size and feature between the stir zones at the two traveling speeds. The hardness of FSPed sample at the room temperature was about 30HV higher than that of as-received one. The maximum stress of the FSPed sample was reduced remarkably at lower strain rates compared with those of the as-received one at 573K and 673K. On the other hand, the elongation to failure of the FSPed sample showed ten to thirteen times larger than that of the as-received one at 573K and low strain rates. Further surface morphology near the fracture tip was observed by scanning electron microscopy to discuss deformation mechanism at high temperatures.

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Kim, Kwon Hoo, Kazuto Okayasu, and Hiroshi Fukutomi. "Effect of Large Strain on Texture Formation Behavior of AZ80 Magnesium Alloy during High Temperature Deformation." Materials Science Forum 879 (November 2016): 938–42. http://dx.doi.org/10.4028/www.scientific.net/msf.879.938.

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In previous study, the formation behavior of texture and microstructure in AZ80 magnesium alloy under high temperature deformation was investigated. It was found that the basal texture was formed at stress of more than 15-20MPa and the non-basal texture was formed at stress of less than 15-20MPa. This means that stress of 15-20MPa is the change point of deformation mechanism. Therefore, in this study, uniaxial compression deformation of AZ80 magnesium alloy was carried out at high temperature deformation (stress of 15-20MPa). Behaviors of microstructure and texture development are experimentally studied. The material used in this study is a commercial magnesium alloy extruded AZ80. The uniaxial compression deformation is performed at temperature of 723K and strain rate 3.0×10-3s-1, with a strain range of between-0.4 and-1.3. Texture measurement was carried out on the compression planes by the Schulz reflection method using nickel filtered Cu Kα radiation. EBSD measurement was also conducted in order to observe spatial distribution of orientation. As a result of high temperature deformation, the maximum value of the flow stress is observed at the true stress-strain curves, and the main component of texture and the accumulation of pole density vary depending on deformation condition.

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Liang, Wei, Lin Guan, Qiongying Lv, and Zhigang Xing. "Research on Multipass Hot Spinning Process Technology of AZ80 Magnesium Alloy Shell." Advances in Materials Science and Engineering 2019 (November 30, 2019): 1–16. http://dx.doi.org/10.1155/2019/8930134.

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Combined with finite element numerical simulation analysis, the hot-spin forming technology of cylindrical AZ80 magnesium alloy parts was studied in the paper. The multipass hot-spin forming of magnesium alloy shell parts was simulated by the ABAQUS software to analyze the stress and strain distribution and change during spinning for the preliminary test process parameters in the magnesium alloy spinning test. Then, the process parameters were optimized during the hot spinning test, especially the matching relationship between temperature parameter and thinning rate parameter, and the hot spinning magnesium alloy shell parts with the expected technical specifications were finished.

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Sun, Wei Bing, and Cu Ming Liu. "Influence of a Trace Alloying of Ag on the Ageing Behavior and Mechanical Properties of AZ80M Magnesium Alloys." Materials Science Forum 849 (March 2016): 154–61. http://dx.doi.org/10.4028/www.scientific.net/msf.849.154.

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The ageing behavior of AZ80+xAg (x=0;0.3;0.5) magnesium alloys at different temperature were systematically investigated using optical microscopy, scanning electron microscopy and X-ray diffraction analysis. Experimental results demonstrate that the trace amount of Ag accelerated the precipitation of Mg17Al12 phase during ageing at 200°C, AZ80+0.5Ag achieved the peak hardness of 89.7HV after holding for 12h, compared with 80.8HV after 28h for the Ag-free alloy. However, when ageing at high temperature (250°C), the promotion response of Ag was totally vanished. The tensile property of the peak aged alloys at ambient temperature increased with Ag addition, as well as the tensile property at elevated temperature. Further investigation indicates that Ag addition suppresses the discontinuous precipitates, which account for the enhanced property of Ag-containing alloy.

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Yang, Ya Qin, Zhi Min Zhang, and Bao Cheng Li. "A Morphology Observation of β-Mg₁₇Al₁₂ Phase in AZ80 Magnesium Alloy Subjected to Hot Compression Deformation under Different Conditions." Materials Science Forum 686 (June 2011): 6–10. http://dx.doi.org/10.4028/www.scientific.net/msf.686.6.

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The precipitation mechanism of secondary-precipitated phase β in AZ80 magnesium alloy during the hot compression deformation under different temperature was investigated. The results show that there are β-Mg17Al12 phases with different morphology and precipitation mechanism in the microstructure of AZ80 alloy deformed both in two-phase region、critical region and single-phase region. β-Mg17Al12 phases were directly deformed and broken to be strip form during the compression under 200、250、300 and 350°C. A lot of fine granular second phase particles precipitated with the grain refinement simultaneously in AZ80 alloy deformed in two-phase region with tremendous deformation. There are also fine granular second phase particles precipitated in the alloy deformed in critical region. There are massive β-Mg17Al12 phases precipitated in the alloy deformed under higher temperature such as 350 and 400°C during the water cooling after the compression, the high power observation of which is fine and tightly lamellar microstructure. Compared with coarse reticular β-Mg17Al12 phases in the as-cast microstructure of AZ80 alloy, the morphology of β-Mg17Al12 phases precipitated during the hot compression has obvious improvement.

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Lee, Y. J., S. C. Wu, J. H. Chen, M. T. Yeh, K. M. Lin, and H. C. Lin. "Effects of Cold-Spray Coatings on the Corrosion Properties of AZ80 Magnesium Alloy." Key Engineering Materials 573 (September 2013): 43–48. http://dx.doi.org/10.4028/www.scientific.net/kem.573.43.

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In this study, the coating layers of IN625 and 301 stainless steel powders were deposited on the AZ80 magnesium alloy substrates by cold-spray technique. The crystal structures, cross-section of the coating layers and anti-corrosion capabilities were examined via XRD, SEM, potentio-dynamic polarization and salt spray test. Experimental results show that the coating layers have a few porosities. The AZ80 substratesexhibit a phenomenon of grain refining after the cold-spraying. Meanwhile, these coating layers could improve significantly the alloy’s corrosion resistance.

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Xia, Zi Hui, and Feng Ju. "Finite Element Analysis of the Forging Process of Magnesium Wheels." Key Engineering Materials 345-346 (August 2007): 1079–84. http://dx.doi.org/10.4028/www.scientific.net/kem.345-346.1079.

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The high specific strength of the magnesium alloy makes it a valuable choice for automotive, aerospace and sporting industries, where the weight reduction is a critical consideration in design. However, wrought magnesium alloys offer a poor formability at room temperature and a hot working condition is required for the forming process. This paper studies the application of finite element methods for the simulation of the forging of magnesium alloys. Numerical analysis of the forging process of an automotive magnesium wheel is conducted based on the tested flow curve of AZ80. The effect of friction on the final deformation of the upsetting of magnesium billets is also discussed.

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Liang, Haicheng, Jianming Kang, Dazhi Zhao, Qichi Le, and Tianze Liu. "Simulation and analysis of AZ80 magnesium alloy centrifugal casting." Journal of Physics: Conference Series 2459, no. 1 (March 1, 2023): 012049. http://dx.doi.org/10.1088/1742-6596/2459/1/012049.

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Abstract Centrifugal casting magnesium alloy pipe has been widely used. Still, because of its poor mechanical properties, it isn’t to meet the needs of the working environment, which limits its development in civil and industrial fields. Therefore, it is necessary to study the centrifugal casting process of magnesium alloy. In this paper, AZ80 magnesium alloy is used as the research material, and the numerical simulation of the centrifugal casting process is carried out by ANSYS Fluent software. The influence of different variable conditions on the solidification rate is analyzed, and a concept of defect ratio is proposed. The post-processing software is used to write an expression for macroscopic analysis of pore defect ratio on the outer surface of the casting, using which the influence of defect ratio under different variables is given. The research aims to guide the centrifugal casting experiment and predict the defects, greatly saving resources and costs.

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Lou, Yan, Luo Xing Li, and Na Luan. "Flow Stress Correction of AZ80 Magnesium Alloy for Deformation Heating at High Strain Rates during Hot Compression." Advanced Materials Research 129-131 (August 2010): 1326–30. http://dx.doi.org/10.4028/www.scientific.net/amr.129-131.1326.

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Accurate description of the material flow stress behaviour is an essential requirement for FEM simulation of metal forming processes. In the present hot compression tests of AZ80 magnesium alloy were performed on Gleeble 3500 at strain rates between 0.01-50s-1 and deformation temperatures between 300-450°C to determine the flow stress data of the AZ80 magnesium alloy. It was noticed that with increasing strain rate, deformation heating become more pronounced since there is no time for heat escaping during hot compression tests. Thus, a flow stress correction for deformation heating at high strain rates was carried out for the calculation of the constants of constitutive equation. Validation tests were then performed. Good agreements between the predicted and measured values in extrusion pressure were achieved.

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Shi, Ping, and Xue Dong Han. "A Preliminary Study of Anodization and Electroless Ni–P Plating on AZ80 Magnesium Alloy." Advanced Materials Research 299-300 (July 2011): 663–66. http://dx.doi.org/10.4028/www.scientific.net/amr.299-300.663.

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Magnesium alloys are being used as structural components in industry because of their high strength to weight ratio. But their high electrochemical activity and poor corrosion resistance limited their applications. Therefore, surface modifications are needed for protection purpose. This paper studied the anodic micro-arc oxidation and electroless Ni-P plating surface modifications on AZ80 magnesium alloy. The SEM, XRD and EDS were used to characterize the surface coating. It shows that a micro-porous MgO layer with the pores size 5 – 20 μm was fabricated on the bare magnesium alloy. The nodule Ni-P deposition could be prepared on the out layer of MgO with Ni/P atomic ratio being 1.4. The pores in MgO layer could be sealed by the following Ni-P deposition. Therefore the corrosion resistance of the magnesium alloy could be further improved.

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43

Lou, Yan. "Modeling of High Temperature Flow Stress of AZ80 Magnesium Alloy with Support Vector Machines and Artificial Neural Network." Advanced Materials Research 486 (March 2012): 227–32. http://dx.doi.org/10.4028/www.scientific.net/amr.486.227.

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Support vector machines (SVM) and artificial neural network (ANN) were employed in modeling the flow stress of the AZ80 magnesium. The hot deformation behavior of extruded AZ80 magnesium was investigated by compression tests in the temperature 350-450 and strain rate range 0.01-50 s-1. The maximum relative errors at different temperatures and different strain rates between experimental and predicted flow stresses by SVM and ANN were compared. The results show the SVM derives statistical models have better similar prediction ability to those of ANN, especially at high strain rate. This indicates that SVM can be used as an alternative modeling tool for high temperature rheological behavior studies.

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Chen, Yan Fei, Ji Xue Zhou, Xiao Cun Song, Hong Tao Liu, and Yuan Sheng Yang. "Efficient Micro-Arc Oxidation Technology for As-Cast AZ80 Magnesium Alloy." Materials Science Forum 913 (February 2018): 406–15. http://dx.doi.org/10.4028/www.scientific.net/msf.913.406.

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A new efficient micro-arc oxidation technology was developed for AZ80 magnesium alloy, the treating time was shorten to 3 min compared to the conventional micro-arc oxidation process. The surface morphologies and cross section morphology of the coatings were analyzed by scanning electron microscopy (SEM) and X-ray energy dispersive spectroscopy (EDS). The corrosion behavior and process of the coatings were investigated with potentiodynamic polarization tests and salt spry tests. The research results show that a 4 μm thick oxide film grew rapidly on the surface of AZ80 magnesium alloy under the special prepared electrolyte and high density current. The corrosion resistance of ceramic coating prepared by the new technology was greatly improved for four order of magnitude and it was mainly consisted of dense layer, the coated samples exhibit excellent corrosion resistance not only in the potentiodynamic polarization tests but also in the long term corrosion tests.

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Deng, Peng Hui, Hong Yu Zhu, Zhao Guang Wang, and Gang Yi Cai. "Study of Duplex Ageing Treatment of AZ80 Magnesium Alloy after Deformation at Room Temperature." Advanced Materials Research 476-478 (February 2012): 11–15. http://dx.doi.org/10.4028/www.scientific.net/amr.476-478.11.

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Duplex ageing treatment was performed on AZ80 magnesium alloy deformed at room temperature. This study focus on the ageing treatment process on the deformed alloys, and the table of L16(45) of orthogonal design was adopted in the experiment. The influence of ageing treatment process on the hardness and microstructure were analyzed and discussed. The experimental results show that the hardness increased with increase of deformation ratio, which is up to the peak value at 30%. The order of effects on hardness is the time of second-stage ageing treatment, the temperature of second-stage ageing treatment, the time of first-stage ageing treatment, the temperature of first-stage ageing treatment in turn. The optimal heat treatment process were obtained, which were consisted of solution treated at 420°C for 10h, deformation with 30% ratio, first-stage aged at 140°C for 12h, followed by second-stage aged at 180°C for 16h. The sample of AZ80 magnesium alloy treated under the optimal process has homogeneous and fine grains and comprehensive property.

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Liu, Fen Cheng, Qiang Liu, Chun Ping Huang, Kun Yang, Cheng Gang Yang, and Li Ming Ke. "Microstructure and Corrosion Resistance of AZ80/Al Composite Plate Fabricated by Friction Stir Processing." Materials Science Forum 747-748 (February 2013): 313–19. http://dx.doi.org/10.4028/www.scientific.net/msf.747-748.313.

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AZ80/Al composite plate was fabricated by means of friction stir processing (FSP) aimed at the improvement of corrosion resistance of magnesium alloy. The cross-section microstructure, surface morphology and corrosion resistance of the Al composite layer were investigated. The experiment results indicated that a dense composite Al layer with superfine and uniform grains was formed, and a few amount of intermetallic compounds existed in the area of Mg/Al interface. The bonding strength of AZ80 magnesium alloy substrate and 1060 pure Al layer was proved to be high which was resulted from the metallurgical bonding of FSP. Microhardness measurement showed the continuous changing of microhardness values from the outmost surface of composite Al layer to the magnesium alloy substrate. Results of electrochemical corrosion test of the composite plate in 5 wt.% NaCl solution showed the better protection effect of the composite Al layer on the magnesium alloy in a corrosion medium. Almost the same corrosion level on the whole corrosion surface was observed which indicated the highly uniform microstructure of the composite layer. It was also proved that the plain arches on the outmost surface of the composite Al layer had no influence on the corrosion resistance of composite Al layer.

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Zhongjun, Wang. "Superplastic Deformation Of A Relatively Coarsegrained AZ80 Magnesium Alloy." Advanced Materials Letters 2, no. 2 (June 1, 2011): 113–17. http://dx.doi.org/10.5185/amlett.2010.12217.

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48

SAGA, Tsuneo, Shuji NAGAI, and Eiichiro SATO. "Turning machinability of AZ31 and AZ80 magnesium alloy bars." Journal of Japan Institute of Light Metals 41, no. 4 (1991): 232–37. http://dx.doi.org/10.2464/jilm.41.232.

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49

QIAO, Jun, Fu-bo BIAN, Min HE, and Yu WANG. "High temperature tensile deformation behavior of AZ80 magnesium alloy." Transactions of Nonferrous Metals Society of China 23, no. 10 (October 2013): 2857–62. http://dx.doi.org/10.1016/s1003-6326(13)62807-1.

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50

Yang, Ping, Li-na Wang, Qing-ge Xie, Ji-zhong Li, Hua Ding, and Lin-lin Lu. "Influence of deformation on precipitation in AZ80 magnesium alloy." International Journal of Minerals, Metallurgy, and Materials 18, no. 3 (May 29, 2011): 338–43. http://dx.doi.org/10.1007/s12613-011-0444-7.

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Journal articles on the topic 'AZ80 magnesium alloy'

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