Gotowe bibliografie tematyczne / Mg AZ31B

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Gotowa bibliografia na temat „Mg AZ31B”

Autor: Grafiati

Data publikacji: 11 września 2023

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Artykuły w czasopismach na temat "Mg AZ31B"

Numano, Masatada, Nobuyuki Mori, Yoshihiro Nakai i Nozomu Kawabe. "Properties of AZ31 and AZ91 Sheets Made by Twin Roll Casting". Materials Science Forum 539-543 (marzec 2007): 1650–55. http://dx.doi.org/10.4028/www.scientific.net/msf.539-543.1650.

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A feasibility study has been made to produce the Mg alloy sheet of high tensile strength and formability by strip casting and an optimized rolling process. 4mm thickness AZ31 and AZ91 strips were cast successfully. While the microstructure of the cast AZ31 strip consisted of columnar zones, the cast AZ91 strip consisted of fine, equiaxed dendrite and fine precipitations. All samples were rolled to 0.5 mm thickness using an optimized finish-rolling schedule, and their grain size was around 4μm. The ultimate tensile strength (UTS), yield strength (YS) (0.2% offset) and elongation (EL) of the rolled AZ31 sheet were higher than those of commercial AZ31B sheet, and the UTS and YS of the rolled AZ91 sheet were 30% higher than commercial AZ31B sheet. The press formability of the rolled AZ31 and AZ91 sheet was equal or superior to commercial AZ31B sheet.

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Ha, Seon Mi, Sang Shik Kim, Dong Yim Chang, Chang Gil Lee i Sung Joon Kim. "Tensile Properties of Friction Stir Welded AZ31B Mg Alloy". Solid State Phenomena 124-126 (czerwiec 2007): 1357–60. http://dx.doi.org/10.4028/www.scientific.net/ssp.124-126.1357.

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The effect of prior T4 heat treatment and subsequent microstructural evolution on tensile behavior of friction stir welded (FSWed) AZ31B-H24 alloy was examined in this study. Selected AZ31B-H24 plates were prior T4 heat treated at 400 for 24 hours and subsequently friction stir welded. The tensile properties, optical micrographs and SEM fractographs for FSWed AZ31B-T4 specimens were compared with those for the H24 counterparts. Prior T4 heat treatment tended to decrease the tensile ductility reduction in FSWed AZ31B-H24 specimen. The tensile ductility reduction mechanism as associated with prior T4 heat treatment is discussed based on detailed micrographic and fractographic observations.

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Zou, Jian, Zhongmin Shi, Hongwei Xu i Xiaolin Li. "In Vitro Studies on the Degradability, Bioactivity, and Cell Differentiation of PRP/AZ31B Mg Alloys Composite Scaffold". BioMed Research International 2017 (2017): 1–8. http://dx.doi.org/10.1155/2017/5763173.

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In recent years, more and more methods have been developed to improve the bioactivity of the biodegradable materials in bone tissue regeneration. In present study, we used rat mesenchymal stem cells (rMSCs) to evaluate the outcomes of Mg alloys (AZ31B, Magnesium, and Aluminum) and Platelet-rich plasma (PRP)/Mg alloys on rMSCs biocompatibility and osteogenic differentiation. Water absorption experiments indicated that both bare AZ31B and PRP/AZ31B were capable of absorbing large amounts of water. But the water absorption ratio for PRP/AZ31B was significantly higher than that for bare AZ31B. The degradability experiments implied that both samples degraded at same speed. rMSCs on the surface of AZ31B distributed more and better than those on the AZ31B scaffold. In ALP activity experiment, the activity of rMSCs on the PRP/AZ31B was markedly higher than that on the AZ31B scaffolds on the 7th day and 14th day. qRT-PCR also showed that OPN and OCN were expressed in both samples. OPN and OCN expression in PRP/AZ31B sample were higher than those in bare AZ31B samples. In summary, the in vitro study implied that AZ31B combined with PRP could remarkably improve cell seeding, attachment, proliferation, and differentiation.

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Hwang, Do Yeon, Akira Shimamoto i Kazuyoshi Takayama. "High-Velocity Impact Characteristic of Mg Alloy and CFRP Composite". Key Engineering Materials 334-335 (marzec 2007): 185–88. http://dx.doi.org/10.4028/www.scientific.net/kem.334-335.185.

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This study examined the dynamic penetration phenomena of high-velocity impact of magnesium alloy CFRP (Carbon Fiber Reinforced Plastic) composite. Test materials for investigation are magnesium alloy(AZ31B), the heat-treated magnesium alloy (AZ31B-200°C, AZ31B-300°C, AZ31B-430°C), and carbon/epoxy laminated composite materials with fiber direction [0°]8, [0°/45°]4s, [ 0°/90°]4s, [ 0°/45°/90°]3s and [ 0°/45°/-45°/90°]2s. We used a ballistic range (one-stage light gas gun), and the test specimens were set at 0°obliquity at room temperature. A high-speed camera allowed us to capture and analyzed the dynamic penetration phenomena of the test specimen.

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Guo, Mei Ling, Ming Jen Tan, Xu Song i Beng Wah Chua. "Numerical and Experimental Investigation on the Hybrid Superplastic Forming of the Conical Mg Alloy Component". Defect and Diffusion Forum 385 (lipiec 2018): 391–96. http://dx.doi.org/10.4028/www.scientific.net/ddf.385.391.

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Hybrid superplastic forming (SPF) is a novel sheet metal forming technique that combines hot drawing with gas forming process. Compared with the conventional SPF process, the thickness distribution of AZ31B part formed by this hybrid SPF method has been significantly improved. Additionally, the microstructure evolution of AZ31 was examined by electron backscatter diffraction (EBSD). Many subgrains with low misorientation angle were observed in the coarse grains during SPF. Based on the tensile test results, parameters of hyperbolic sine creep law model was determined at 400 oC. The hybrid SPF behavior of non-superplastic grade AZ31B was predicted by ABAQUS using this material forming model. The FEM results of thickness distribution, thinning characteristics and forming height were compared with the experimental results and have shown reasonable agreement with each other.

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Hwang, Do Yeon, Akira Shimamoto, Daiju Numata, Takamase Kikuchi i Kazuyoshi Takayama. "Experimental Study of High-Velocity Impact Characteristic of Mg Alloy Using Ballistic Range". Key Engineering Materials 321-323 (październik 2006): 654–57. http://dx.doi.org/10.4028/www.scientific.net/kem.321-323.654.

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In this study, dynamic penetration phenomena of high-velocity impact of magnesium alloy were investigated. The surface hardness of magnesium alloy (AZ31B-O) and the heat-treated magnesium alloy (AZ31B-200°C, AZ31B-300°C, and AZ31B-430°C) were examined using Micro Vickers, and the influence of the heat treatment temperature was observed. We analyzed the metal organization using a microscope. We also used a ballistic range (two-stage light gas gun), and the test specimens were set at 0°obliquity at room temperature. A high-speed camera allowed us to capture and analyzed the dynamic penetration phenomena of the test specimen.

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Coelho, R. S., A. Kostka, Haroldo Pinto, Stefan Riekehr, Mustafa Koçak i Anke Pyzalla. "Microstructure and Residual Stresses in Dissimilar Mg-Al-Zn-Alloy Single Overlap Laser Beam Welds". Materials Science Forum 571-572 (marzec 2008): 361–66. http://dx.doi.org/10.4028/www.scientific.net/msf.571-572.361.

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Microstructure, hardness and residual stresses of the laser beam overlap welds between AZ31B sheets and AZ31, AZ61 and AZ80 extruded profiles are investigated using microscopy and X-ray diffraction. The result of the investigations reveal that weld microstructure, the size of the HAZ, precipitate density and the maximum compressive residual stress values depend strongly on the Al content of the weld zone of two Mg-alloys.

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LOU, X., M. LI, R. BOGER, S. AGNEW i R. WAGONER. "Hardening evolution of AZ31B Mg sheet". International Journal of Plasticity 23, nr 1 (styczeń 2007): 44–86. http://dx.doi.org/10.1016/j.ijplas.2006.03.005.

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Piao, Kun, Kwansoo Chung, Myoung-Gyu Lee i Robert H. Wagoner. "Twinning-Slip Transitions in Mg AZ31B". Metallurgical and Materials Transactions A 43, nr 9 (17.05.2012): 3300–3313. http://dx.doi.org/10.1007/s11661-012-1154-0.

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Daroonparvar, Mohammadreza, Ashish K. Kasar, Mohammad Umar Farooq Khan, Pradeep L. Menezes, Charles M. Kay, Manoranjan Misra i Rajeev K. Gupta. "Improvement of Wear, Pitting Corrosion Resistance and Repassivation Ability of Mg-Based Alloys Using High Pressure Cold Sprayed (HPCS) Commercially Pure-Titanium Coatings". Coatings 11, nr 1 (6.01.2021): 57. http://dx.doi.org/10.3390/coatings11010057.

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In this study, a compact cold sprayed (CS) Ti coating was deposited on Mg alloy using a +high pressure cold spray (HPCS) system. The wear and corrosion behavior of the CS Ti coating was compared with that of CS Al coating and bare Mg alloy. The Ti coating yielded lower wear rate compared to Al coating and Mg alloy. Electrochemical Impedance spectroscopy (EIS) and cyclic potentiodynamic polarization (CPP) tests revealed that CS Ti coating can substantially reduce corrosion rate of AZ31B in chloride containing solutions compared to CS Al coating. Interestingly, Ti-coated Mg alloy demonstrated negative hysteresis loop, depicting repassivation of pits, in contrast to AZ31B and Al-coated AZ31B with positive hysteresis loops where corrosion potential (Ecorr) > repassivation potential (Erp); indicating irreversible growth of pits. AZ31B and Al-coated AZ31B were most susceptible to pitting corrosion, while Ti-coated Mg alloy indicated noticeable resistance to pitting in 3.5 wt % NaCl solution. In comparison to Al coating, Ti coating considerably separated the AZ31BMg alloy surface from the corrosive electrolyte during long term immersion test for 11 days.

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Rozprawy doktorskie na temat "Mg AZ31B"

Wu, Tso-chang. "Laser Surface Modification of AZ31B Mg Alloy Bio-Implant Material". Thesis, University of North Texas, 2018. https://digital.library.unt.edu/ark:/67531/metadc1248459/.

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Magnesium and its alloys are considered as the potential biomaterials due to their biocompatibility and biodegradable characteristics but suffer from poor corrosion performance. Various surface modification techniques are employed to improve their corrosion resistance. In present case, laser surface melting was carried out on AZ31B Mg alloy with various laser energy densities using a continuous wave ytterbium laser. Effect of laser treatment on phase and microstructure evolution was evaluated by X ray diffraction and scanning electron microscopy. Multi-physics thermal model predicted time temperature evolution along the depth of the laser treatment zone. Additionally, electrochemical method and bio-immersion test were employed to evaluate the corrosion behavior in simulated body fluid medium. Microstructure revealed grain refinement and even distribution of Mg17Al12 phase along the grain boundary for laser treated samples leading to substantial enhancement in the corrosion resistance of the laser treated samples compared to the untreated alloy. The laser processed samples also possessed a superior wettability in SBF solution than the untreated sample. This was further reflected in enhanced bio-integration behavior of laser processed samples. By changing the parameters of laser processing such as power, scanning speed, and fill spacing, a controllable corrosion resistance and bioactivity/biocompatibility of the implant material was achieved.

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Ho, YeeHsien. "Laser Surface Modification on Az31b Mg Alloy for Bio-wettability". Thesis, University of North Texas, 2013. https://digital.library.unt.edu/ark:/67531/metadc407788/.

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Laser surface modification of AZ31B Magnesium alloy changes surface composition and roughness to provide improved surface bio-wettability. Laser processing resulted in phase transformation and grain refinement due to rapid quenching effect. Furthermore, instantaneous heating and vaporization resulted in removal of material, leading the textured surface generation. A study was conducted on a continuum-wave diode-pumped ytterbium laser to create multiple tracks for determining the resulting bio-wettability. Five different laser input powers were processed on Mg alloy, and then examined by XRD, SEM, optical profilometer, and contact angle measurement. A finite element based heat transfer model was developed using COMSOL multi-physics package to predict the temperature evolution during laser processing. The thermal histories predicted by the model are used to evaluate the cooling rates and solidification rate and the associated changes in the microstructure. The surface energy of laser surface modification samples can be calculated by measuring the contact angle with 3 different standard liquid (D.I water, Formamide, and 1-Bromonaphthalen). The bio-wettability of the laser surface modification samples can be conducted by simulated body fluid contact angle measurement. The results of SEM, 3D morphology, XRD, and contact angle measurement show that the grain size and roughness play role for wetting behavior of laser processing Mg samples. Surface with low roughness and large grain size performs as hydrophilicity. On the contrast, surface with high roughness and small grain size performs as hydrophobicity.

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Piao, Kun. "An Elevated-Temperature Tension-Compression Test and Its Application to Mg AZ31B". The Ohio State University, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=osu1316096630.

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Mohammed, Anwaruddin. "ACHIEVING ULTRAFINE GRAINS IN Mg AZ31B-O ALLOY BY CRYOGENIC FRICTION STIR PROCESSING AND MACHINING". UKnowledge, 2011. http://uknowledge.uky.edu/ms_etds/1.

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This thesis presents results from the application of cryogenic cooling on multiple-pass friction stir processing and the subsequent orthogonal machining on friction stir processed and as-received Mg AZ31B-O disks, and shows their combined effects on microstructure and microhardness values. A simple friction stir tool, a specially designed fixture and liquid nitrogen are used to perform multiple-pass friction stir processing experiments on Mg AZ31B-O alloy. The friction stir processed and as-received sheets are then made into disks for the orthogonal machining experiments. This study analyzes the microhardness, microstructure changes by cryogenic friction stir processing and the effect of machining conditions such as dry, MQL and cryogenic and cutting parameters on the Mg AZ31B-O alloy. Four different speeds and three different feed rates are used for the orthogonal machining experiments. The effects of stirring parameters such as the translational feed, rotational speed, cooling conditions and the machining parameters are studied. The resulting microstructure and microhardness from these processes hold a key to the mechanical properties of the alloy. This analysis would help to understand and evaluate the specific aspects of grain size and microhardness that influence the fatigue life of a component.

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Ho, Yee Hsien. "In Vitro Behavior of AZ31B Mg-Hydroxyapatite Metallic Matrix Composite Surface Fabricated via Friction Stir Processing". Thesis, University of North Texas, 2016. https://digital.library.unt.edu/ark:/67531/metadc862762/.

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Magnesium and its alloys have been considered for load-bearing implant materials due to their similar mechanical properties to the natural bone, excellent biocompatibility, good bioactivity, and biodegradation. Nevertheless, the uncontrollable corrosion rate in biological environment restrains their application. Hydroxyapatite (HA, Ca10(PO4)6(OH)2) is a widely used bio-ceramic which has bone-like mineral structure for bone fixation. Poor fracture toughness of HA makes it not suitable for load-bearing application as a bulk. Thus, HA is introduced into metallic surface in various forms for improving biocompatibility. Recently friction stir processing (FSP) has emerged as a surface modification tool for surface/substrate grain refinement and homogenization of microstructure in biomaterial. In the pressent efforts, Mg-nHA composite surface on with 5-20 wt% HA on Mg substrate were fabricated by FSP for biodegradation and bioactivity study. The results of electrochemical measurement indicated that lower amount (~5% wt%) of Ca in Mg matrix can enhance surface localized corrosion resistance. The effects of microstructure,the presence of HA particle and Mg-Ca intermetallic phase precipitates on in vitro behavior of Mg alloy were investigated by TEM, SEM, EDX,XRD ,and XPS. The detailed observations will be discussed during presentation.

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Catorceno, Litzy Lina Choquechambi. "Estudo do encruamento, recristalização e crescimento de grão em chapa da liga de magnésio AZ31B (Mg - 3%Al - 1%Zn - 0,3%Mn)". Universidade de São Paulo, 2013. http://www.teses.usp.br/teses/disponiveis/3/3133/tde-15082014-151305/.

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As ligas de magnésio atraíram a atenção novamente nos últimos anos por causa de suas propriedades de baixa densidade, resistência à tração e rigidez específica. Por outro lado, a maior limitação para o uso de ligas trabalhadas é a baixa conformabilidade em temperatura ambiente devido à estrutura hexagonal compacta (HCP) das ligas. O presente trabalho de pesquisa teve como objetivo estudar o encruamento, recristalização e crescimento de grãos durante a laminação de liga magnésio AZ31B em alta e baixa temperatura, analisando a evolução da microestrutura, da textura e a variação das propriedades sensíveis à microestrutura. A liga AZ31B é sensível à taxa de deformação em alta temperatura, entretanto, a anisotropia é negativamente afetada na laminação a frio, portanto, apresenta uma melhor laminação na faixa de temperaturas de 200 a 300ºC, devido ao refinamento de grãos, causado pela recuperação e recristalização dinâmica. O estudo foi realizado em amostras de uma chapa de liga de magnésio AZ31B recristalizada (2 mm de espessura). Amostras foram deformadas por laminação em temperaturas diferentes (25, 100, 200, 250 e 300ºC) e com diferentes taxas de deformação. A caracterização microestrutural foi realizada com auxílio de várias técnicas complementares de análise microestrutural, tais como microscopia óptica, microscopia eletrônica de varredura, análise de raios-X por dispersão de energia, difração de raios X e microdureza Vickers. A deformabilidade e a ocorrência de recristalização dinâmica e crescimento de grãos mostraram forte dependência com as condições de laminação. Na laminação a frio, o refinamento de grão foi mais efetivo com baixas taxas de deformação (1,6 s-1) do que na laminação a quente. Entretanto, a intensa textura basal foi enfraquecida em temperaturas próximas a 300ºC e com taxas de deformação próximas a 3,5 s-1. A ductilidade das ligas pode ser melhorada em altas temperaturas de deformação, pelo refinamento dos grãos que produz a diminuição da fração volumétrica das regiões macladas e pelo aumento do número de sistemas de deslizamento, além do enfraquecimento da intensa textura basal, característica das ligas de magnésio.
Magnesium alloys have attracted the attention again in recent years because of their low density, their specific tensile strength and rigidity. However, the greatest limitation for the usage of wrought magnesium alloys is their poor formability at room temperature due to the hexagonal closed packed (HCP) crystal structure. The present research focused on study the work-hardening, recrystallization and grain growth during rolling of AZ31B magnesium alloy at low and high rolling temperature. It was made through the analysis of microstructure and texture evolution and variations of microstructure-sensitive properties. The AZ31 magnesium alloy is sensitive to strain rate at high temperature, meanwhile, the anisotropy is adversely impacted in cold rolling sheets. Thus, AZ31B magnesium alloy exhibits better workability in 200-300°C temperature range due to the grain refinement caused by dynamic recovery and dynamic recrystallization. This research was carried out on samples of recrystallized sheet (2 mm in thickness). Samples were deformed by rolling at different temperatures (25, 100, 200, 250 and 300°C), using different strain rates. Microstructural characterization was done by using several complementary techniques of microstructural analysis, such as optical microscopy, scanning electron microscopy, X-ray analysis by energy dispersive, X-ray diffraction and Vickers microhardness tests. A competition between dynamic recrystallization and grain growth depends on rolling conditions. Low strain rate (1,6 s-1) at cold rolling improved more effective in refining grains than warm rolling. Meanwhile, the intense basal texture was weakened at 300°C with a high strain rate of 3,5 s-1. The ductility of magnesium alloys can be greatly improved at high temperature, with a fine grain structure that causes the reduced volume fraction of twins, and an increase the number of slip systems, weakening the intense basal texture, rather characteristic for magnesium alloys.

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Feng, Zhiyuan. "Corrosion inhibition study of AZ31 Mg alloy by Vanadate, Selenite and Phosphate". The Ohio State University, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=osu1565922333673566.

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Cusick, Michael Christopher. "THE USE OF SELECTIVE ANNEALING FOR SUPERPLASTIC FORMING OF MG AZ31 ALLOY". UKnowledge, 2007. http://uknowledge.uky.edu/gradschool_theses/492.

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A recent study on the Post-Formed properties of Superplastically Formed Magnesium AZ31B has shown that the heating time prior to testing has a major effect on the Post Forming properties of the superplastically material. To this point, there has been very little examination into the effect of pre-heating or annealing on superplastic forming (SPF) properties. In this work, the effects of annealing prior to the SPF of Mg AZ31 alloy were examined. Both high temperature SPF tensile and bulge specimens were formed after annealing. Multiple annealing temperatures were examined to produce specimens with grain sizes ranging from 8 andamp;igrave;m to 15 andamp;igrave;m for comparison with traditional SPF results. The results show that the effect of annealing can be suitable for the improvement of thinning and possibly the forming time of superplastically formed Magnesium alloys through the control of the microstructure.

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Hütsch, Leon Leander [Verfasser], i Norbert [Akademischer Betreuer] Huber. "Texture based formability enhancement of Mg AZ31 using high speed friction stir processing / Leon Leander Hütsch. Betreuer: Norbert Huber". Hamburg-Harburg : Universitätsbibliothek der Technischen Universität Hamburg-Harburg, 2014. http://d-nb.info/1061072851/34.

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Kandala, Bala Subramanya Pavan Kumar. "Design, Fabrication, and Testing of Photo-chemically Etched Biodegradable Stents". University of Cincinnati / OhioLINK, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1593171197849115.

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Części książek na temat "Mg AZ31B"

Ha, Seon Mi, Sang Shik Kim, Dong Yim Chang, Chang Gil Lee i Sung Joon Kim. "Tensile Properties of Friction Stir Welded AZ31B Mg Alloy". W Solid State Phenomena, 1357–60. Stafa: Trans Tech Publications Ltd., 2007. http://dx.doi.org/10.4028/3-908451-31-0.1357.

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Glover, C. F., T. W. Cain i J. R. Scully. "Sacrificial Cathodic Protection of Mg Alloy AZ31B by an Mg–5Sn Surface Alloy". W The Minerals, Metals & Materials Series, 183–90. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-05789-3_27.

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Pu, Z., G. L. Song, S. Yang, O. W. Dillon, D. A. Puleo i I. S. Jawahir. "Cryogenic Burnishing of AZ31B Mg Alloy for Enhanced Corrosion Resistance". W Magnesium Technology 2011, 513–18. Cham: Springer International Publishing, 2011. http://dx.doi.org/10.1007/978-3-319-48223-1_95.

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Shaha, Sugrib K., Dwayne Toscano i Hamid Jahed. "Microstructure Evolution of AZ31B Mg Alloy During Biaxial Fatigue Loading". W The Minerals, Metals & Materials Series, 169–74. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-030-92533-8_29.

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Pu, Z., G. L. Song, S. Yang, O. W. Dillon, D. A. Puleo i I. S. Jawahir. "Cryogenic Burnishing of AZ31B Mg Alloy for Enhanced Corrosion Resistance". W Magnesium Technology 2011, 513–18. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2011. http://dx.doi.org/10.1002/9781118062029.ch95.

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Brown, Donald W., A. Jain, Sean R. Agnew i Bjørn Clausen. "Twinning and Detwinning during Cyclic Deformation of Mg Alloy AZ31B". W THERMEC 2006, 3407–13. Stafa: Trans Tech Publications Ltd., 2007. http://dx.doi.org/10.4028/0-87849-428-6.3407.

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Briggs, Nathan, Moriah Bischann i Owen T. Kingstedt. "The Role of Texture on the Strain-Rate Sensitivity of Mg and Mg Alloy AZ31B". W Dynamic Behavior of Materials, Volume 1, 263–67. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-95089-1_49.

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Milner, Justin L., i Fadi Abu-Farha. "Friction Stir Back Extrusion of Mg AZ31B-F: a Preliminary Investigation". W Magnesium Technology 2014, 497–503. Cham: Springer International Publishing, 2014. http://dx.doi.org/10.1007/978-3-319-48231-6_90.

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Milner, Justin L., i Fadi Abu-Farha. "Friction Stir Back Extrusion of Mg AZ31B-F: A Preliminary Investigation". W Magnesium Technology 2014, 497–503. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2014. http://dx.doi.org/10.1002/9781118888179.ch90.

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Toscano, D., S. K. Shaha, B. Behravesh, H. Jahed i B. Williams. "Multiaxial Cyclic Response of Low Temperature Closed-Die Forged AZ31B Mg Alloy". W The Minerals, Metals & Materials Series, 289–96. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-05789-3_43.

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Streszczenia konferencji na temat "Mg AZ31B"

Zhang, Ruixia, Xiaoning Hou, Xianfeng Zhou, Hongyu Gao, Steven Mankoci, Haifeng Qin, Zhencheng Ren i in. "Effects of Laser Shock Peening on the Wear and Degradation Behaviors of Magnesium Alloys". W ASME 2016 11th International Manufacturing Science and Engineering Conference. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/msec2016-8689.

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In this study, we investigated the mechanical properties of AZ31B Mg alloy before and after laser shock peening (LSP). The hardness of the AZ31B Mg alloy increased from 57 HV to 69 HV after LSP. The yield strength increased from 128 MPa to 152 MPa. Wear resistance was significantly improved after LSP. Immersion testing showed that LSP did not significantly increase the element release and weight loss in simulated body fluid. We have demonstrated that LSP is an effective way to improve the mechanical properties of the AZ31B Mg alloy.

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Shen, Ninggang, i Hongtao Ding. "Cryogenic Cutting of AZ31B-O Mg Alloy for Improved Surface Integrity: Part I — Process Principles and Material Modeling". W ASME 2015 International Manufacturing Science and Engineering Conference. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/msec2015-9323.

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This is Part I of a two-part series numerical study which investigates the improvement of surface integrity of AZ31B-O magnesium (Mg) alloy by cryogenic cutting. A light-weighted material of Mg alloy has great potentials for a more extensive application in transportation/aerospace industries and other areas, such as biodegradable medical implants. However, undesired surface integrity, in terms of grain size, microhardness, residual stresses, limit the functional performance of products with components in these materials on strength, wear resistance, fatigue resistance, and corrosion resistance. In this paper, the principle of improved surface integrity by cryogenic cutting is firstly introduced based on a previous experimental study on cryogenic orthogonal cutting of AZ31B-O Mg alloy. To demonstrate the capability of cryogenic cutting on improvement for AZ31B-O Mg alloy components, the improved surface integrity is characterized in terms of better surface finish, ultrarefined grains, increased surface microhardness, and compressive residual stress. A physics-based constitutive material model of plasticity and grain refinement is developed based on both slip and twinning mechanisms for the AZ31B-O Mg alloy undergoing cryogenic cutting.

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Shen, Ninggang, Hongtao Ding i Jiaying Gao. "Cryogenic Cutting of AZ31B-O Mg Alloy for Improved Surface Integrity: Part II — Physics-Based Process Modeling of Surface Microstructural Alteration". W ASME 2015 International Manufacturing Science and Engineering Conference. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/msec2015-9324.

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This is the Part II of a two-part series numerical study which investigates the improvement of surface integrity of AZ31B-O magnesium (Mg) alloy by cryogenic cutting. In Part I, material constitutive behavior and grain refinement mechanism of AZ31B-O Mg alloy under cryogenic cutting conditions were modeled based on both slip and twinning mechanisms. In this study, the material model is implemented in the two-pass cryogenic cutting finite element simulations using a commercial machining simulation software package of AdvantEdge 6.4. The microstructural evolution by nanocrystalline grain refinement and other improvement of the surface integrity of AZ31B-O Mg alloy after cryogenic cutting are simulated. With quantitative assessments, simulation results are further discussed in grain refinement, microhardness change, residual stress, and slip/twinning mechanism in the machined surface of Mg alloy by cryogenic cutting. The results show that the surface integrity of Mg components can be significantly improved by using cryogenic cooling and a larger tool edge radius.

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Maeva, E., D. Dzhurinskiy, V. Leshchynsky i R. Gr Maev. "Corrosion Protection of Mg-Alloys with Cold Sprayed Composite Coatings". W ITSC 2012, redaktorzy R. S. Lima, A. Agarwal, M. M. Hyland, Y. C. Lau, C. J. Li, A. McDonald i F. L. Toma. ASM International, 2012. http://dx.doi.org/10.31399/asm.cp.itsc2012p0351.

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Abstract Due to the demand for improved fuel economy as well as increased safety features, weight reduction is one of the major aims in the automotive industry. Future lightweight automotive components for the next car generation will probably use lots of magnesium alloy. These will form galvanic couples with other materials and may induce phenomena accelerating the corrosion rate of automotive components. The materials used were magnesium alloy AZ31B and several types of cold sprayed coating. The relative performance of each cold sprayed corrosion preventive compounds (CPC) was assessed in combination with the materials under several different electrochemical and accelerated corrosion tests. Baseline data for AZ31B with no CPC applied was also collected. CPC characteristics and properties are also included and discussed. The studies on bare Mg/Steel couples validated accelerated corrosion but found that CPC cold sprayed coatings mitigate corrosion rates. Thus Mg/Fe interfaces with defect-free cold sprayed coatings CPC can prevent buildup of corrosion products and reduce galvanic corrosion of automotive components.

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Hou, Xiaoning, Ruixia Zhang, Zhencheng Ren, Chang Ye, Yalin Dong, Haifeng Qin, Gary Doll, Xianfeng Zhou, Steven Mankoci i Nita Sahai. "Mechanical Properties of Magnesium AZ31B Alloy After Ultrasonic Nanocrystal Surface Modification". W ASME 2016 11th International Manufacturing Science and Engineering Conference. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/msec2016-8737.

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An innovative surface treatment method, ultrasonic nanocrystal surface deformation (UNSM), was used to process a magnesium (Mg) AZ31B alloy in this study. In the UNSM process, ultrasonic impacts induce plastic deformation on material surface that lead to grain refinement and surface morphology changes. The hardness, tensile strength, surface morphology and weight loss from immersion testing of the materials before and after UNSM were studied systematically. Compared with the unprocessed samples, the UNSM-processed samples show significant improvements in hardness (64%) and yield stress (43%). Surface topography results reveal that UNSM generates a smooth surface with an average roughness of 93 nm. In addition, the immersion results in cell medium demonstrate that the UNSM-processed group showed lower weight loss, especially during the early immersion period. It can thus be concluded that UNSM can significantly improve the hardness and yield strength of Mg alloys and reduce the corrosion rate, indicating that UNSM is a promising new method to enhance the mechanical properties of the degradable Mg alloys.

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Mao, Bo, Yiliang Liao i Bin Li. "Twinning Behavior in Magnesium Alloys Processed by Laser Shock Peening". W ASME 2019 14th International Manufacturing Science and Engineering Conference. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/msec2019-2850.

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Abstract In this paper, the surface microstructure evolution of an AZ31B magnesium (Mg) alloy during laser shock peening (LSP) was investigated. Particular attention was paid to the deformation twinning behavior, which plays an important role in the mechanical properties of Mg alloys. The effect of laser intensity on the twinning distribution was investigated. Twin-twin interactions during LSP process were characterized. The mechanism responsible for the formation of gradient twinning microstructure and twinning-induced hardening effect were discussed.

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Xue, Yuna, Xin Pang, Bailing Jiang i Hamid Jahed. "Corrosion Performances Of Micro-Arc Oxidation Coatings On Az31B, Az80 And Zk60 Cast Mg Alloys". W Canadian Society for Mechanical Engineering (CSME) International Congress 2018. York University Libraries, 2018. http://dx.doi.org/10.25071/10315/35419.

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Yu, Zhenzhen, Zhili Feng, Hahn Choo i Sven Vogel. "Texture Modification and Ductility Enhancement in Mg Alloy Through Friction Stir Processing". W ASME 2011 International Mechanical Engineering Congress and Exposition. ASMEDC, 2011. http://dx.doi.org/10.1115/imece2011-65693.

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The effects of friction stir processing (FSP) parameters, i.e., rotation and travel rates of the processing tool, on the texture modification and ductility enhancement of an Mg alloy AZ31B were investigated. With the systematic change in processing parameters as a function of the Zener-Hollomon parameter, a transition of different crystallographic texture was observed through neutron diffraction measurement, which correlated well with the changes in deformation and recrystallization mechanism activated during the processing. The variation in the texture leads to dramatic changes in the strength and ductility in the stir zone of the processed Mg plate. A maximum of three-fold increase in the ductility was achieved in the Mg alloy through FSP when the Zener-Hollomon parameter exceeds 1012 s−1 which is associated with low rotation speed and high travel speed processing conditions.

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El Chlouk, Z. G., G. Ayoub, G. T. Kridli i R. F. Hamade. "Intermetallic Compound Formation in Al/Mg Friction Stir Welded (FSW) Butt Joints". W ASME 2014 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/imece2014-37213.

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In this work, friction stir welding (FSW) is used to produce butt joints of 3-mm-thick sheets of AZ31B magnesium alloy to two different aluminum alloys: AA1100 (minimum 99% aluminum) and AA6061 (97.9% Al). The paper reports on utilizing metallurgical techniques to determine the distribution profiles of elemental aluminum and magnesium within the joints were produced using energy dispersive x-ray spectroscopy (EDX). Furthermore, X-ray diffraction (XRD) was used to identify the intermetallic compounds that form in the joints as a result of the stirring action at processing temperatures. Measurements confirmed the presence of primary intermetallic compounds in the welded joints and were identified to be the α-phase (Al12Mg17) and the β-phase (Al3Mg2). Lastly, micro-hardness studies were conducted at the intermetallic-compounds-rich locations resulting in hardness profiles.

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Mao, Bo, Xing Zhang, Yiliang Liao i Bin Li. "Improving Room Temperature-Stretch Formability of Magnesium Alloys by Laser Shock Peening". W ASME 2019 14th International Manufacturing Science and Engineering Conference. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/msec2019-2910.

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Abstract The applications of magnesium (Mg) and their alloys are often restricted by their poor formability at room temperature. Several strategies have been developed in recent years to enhance the formability of Mg alloys, such as grain refinement and texture weakening, either by alloying or processing. Laser shock peening (LSP) is an advanced laser-based surface processing method which has been utilized improve the surface hardness, fatigue performance, and corrosion resistance of Mg alloys. Recent studies show that LSP can bring significant texture weakening and grain refinement effect in Mg alloy, indicating its potential capability of enhancing the formability of Mg alloys. This research is to explore the applicability of LSP to improve the room temperature-stretch formability of Mg alloys. LSP experiments are carried out on an AZ31B Mg alloys. The microstructure before and after LSP are characterized by optical microscopy (OM) and electron backscattered diffraction (EBSD) microscopy. Erichsen tests are carried out to evaluate the stretch formability of Mg alloys. The results show that LSP can bring texture weakening and grain refinement effect simultaneously, resulting in the improved room temperature-stretch formability of Mg alloys.

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