Готові списки джерел за темами / Al-Si-Cu ALLOY

Добірка наукової літератури з теми "Al-Si-Cu ALLOY"

Автор: Grafiati
Опубліковано: 11 вересня 2023

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Статті в журналах з теми "Al-Si-Cu ALLOY"

1

Tokuda, Momoko, Kenji Matsuda, Takeshi Nagai, Junya Nakamura, Tokimasa Kawabata, and Susumu Ikeno. "TEM Observation of Cu and Ag Addition Al-Mg-Si Alloys." Advanced Materials Research 409 (November 2011): 81–83. http://dx.doi.org/10.4028/www.scientific.net/amr.409.81.

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Анотація:
It has been known that Cu-and Ag-addition Al-1.0mass%Mg2Si alloys (Al-Mg-Si-Cu alloy and Al-Mg-Si-Ag alloy) have higher hardness and elongation than those of Al-1.0mass%Mg2Si alloy. In this study, the aging behaviour of Al-Mg-Si-Cu alloy, Al-Mg-Si-Ag alloy and (Cu+Ag)-addition Al-1.0 mass% Mg2Si alloy (Al –Mg –Si-Cu-Ag alloy) has been investigated by hardness test and TEM observation. The Al-Mg-Si-Cu-Ag alloy has the fastest age-hardening rate in the early aging period and the finest microstructure at the peak hardness among three alloys. Therefore the microstructure of the precipitate in Al–Mg–Si-Cu-Ag alloy has been investigated by HRTEM observation to understand the effect of Cu and Ag addition on aging precipitation.
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2

Tokuda, M., K. Matsuda, T. Nagai, T. Kawabata, J. Nakamura, and S. Ikeno. "Hrtem Observation of the Precipitates in Cu and Ag Added Al-Mg-Si Alloys." Archives of Metallurgy and Materials 58, no. 2 (June 1, 2013): 363–64. http://dx.doi.org/10.2478/v10172-012-0200-7.

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Анотація:
It has been known that Cu- and Ag-added Al-1.0mass%Mg2Si alloys (Al-Mg-Si-Cu alloy and Al-Mg-Si-Ag alloy) have higher hardness and elongation than those of Al-1.0mass%Mg2Si alloy. In this study, the aging behaviour of Al-Mg-Si-Cu alloy, Al-Mg-Si-Ag alloy and (Cu+Ag)-addition Al -1.0 mass% Mg2Si alloy has been investigated by hardness test and TEM observation. The Al-Mg-Si-Cu-Ag alloy has the fastest age-hardening rate in the early aging period and the finest microstructure at the peak hardness among three alloys. Therefore the microstructure of the precipitate in Al-Mg-Si-Cu-Ag alloy has been investigated by HRTEM observation to understand the effect of Cu and Ag addition on aging precipitation.
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3

Zhao, Jing Rui, Yong Du, Li Jun Zhang, Shu Hong Liu, Jin Huan Xia, and Jin Wei Wang. "Thermodynamic Calculation of the Liquidus Projections of the Al-Cu-Fe-Si and Al-Cu-Fe-Mg-Si Multicomponent Systems on Al-Rich Side." Materials Science Forum 993 (May 2020): 984–95. http://dx.doi.org/10.4028/www.scientific.net/msf.993.984.

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Анотація:
The thermodynamic calculations of Al–Cu–Fe–Si quaternary system and Al–Cu–Fe–Mg–Si quinary system were carried out using CALPHAD approach based on the Al–Cu–Fe–Mg–Si thermodynamic database. The liquidus surface projection of Al–Cu–Fe–Si quaternary system at the Al-rich corner was constructed, and then the solidification structures of four Al–Cu–Fe–Si alloys were analyzed by the Gulliver-Scheil solidification simulation. The calculated results were in good agreement with the previous experimental data. The liquidus surface projections of A1–Cu–Fe–Mg–Si quinary system at the region of Al-Cu, Al-Si and Al-Mg were constructed, respectively. The liquidus projection of the multicomponent aluminum alloy system at the Al-rich side was accurately drawn, which could accurately predict the primary phase in the solidification process of the alloy. This work has an important guiding significance for the design of the aluminum alloys.
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4

Pan, Yan Peng, Zhi Feng Zhang, Bao Li, Bi Cheng Yang, and Jun Xu. "Effect of Alloying Elements on Mechanical Properties of Al-Si-Cu-Mg Cast Alloys." Materials Science Forum 817 (April 2015): 127–31. http://dx.doi.org/10.4028/www.scientific.net/msf.817.127.

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Анотація:
To develop Al-Si cast alloys with high performance is important for lightweighting vehicles. In this study, the effects of the alloying elements such as Si, Cu, Mg contents (5%-7% Si, 1%-3%Cu, 0.3%-0.9%Mg) on mechanical properties of a test Al-Si-Cu-Mg cast alloy was studied to achieve a specific composition. The experimental results show that the Al-6%Si-3%Cu-0.3%Mg alloy has better comprehensive mechanical properties after T6 heat treatment, which indicates a remarkable interaction of the alloying elements for improving performance.
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BASKOUTAS, S., V. KAPAKLIS, and C. POLITIS. "BULK AMORPHOUS Zr57Cu20Al10Ni8Ti5 AND Zr55Cu19Al8Ni8Ti5Si5 ALLOYS PREPARED BY ARC MELTING." International Journal of Modern Physics B 16, no. 24 (September 20, 2002): 3707–14. http://dx.doi.org/10.1142/s0217979202013018.

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Анотація:
We have produced bulk amorphous materials by quenching arc melted melts in water cooled copper die. Alloys of the composition Zr 57 Cu 20 Al 10 Ni 8 Ti 5 and Zr 55 Cu 19 Al 8 Ni 8 Ti 5 Si 5 were produced in the form of small cylinders with a diameter of 3 mm and a length of 25 mm. The alloys were investigated by X-ray diffraction and thermal analysis to determine the structure and thermal properties. Complete amorphous X-ray patterns were observed for both alloys. The glass transition temperature is 362°C for the Zr 57 Cu 20 Al 10 Ni 8 Ti 5 alloy and 363°C for the Zr 55 Cu 19 Al 8 Ni 8 Ti 5 Si 5 alloy. The crystallization temperature of the Zr 57 Cu 20 Al 10 Ni 8 Ti 5 alloy was measured to be 414.6°C. The Zr 55 Cu 19 Al 8 Ni 8 Ti 5 Si 5 alloy has a higher crystallization temperature of 425.5°C.
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Zhao, Jing Rui, Yong Du, Li Jun Zhang, Shu Hong Liu, Jin Huan Xia, and Jin Wei Wang. "Thermodynamic Calculation of the Liquidus Projections of the Al-Cu-Fe-Mg, Al-Cu-Mg-Si, and Al-Fe-Mg-Si Quaternary Systems on Al-Rich Corner." Materials Science Forum 993 (May 2020): 1031–42. http://dx.doi.org/10.4028/www.scientific.net/msf.993.1031.

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Анотація:
The thermodynamic calculations of Al-Cu-Fe-Mg, Al-Cu-Mg-Si and Al–Fe–Mg–Si quaternary systems were carried out using CALPHAD method, based on the Al–Cu–Fe–Mg–Si thermodynamic database. The liquidus projection of Al–Cu–Fe–Mg, Al–Cu–Mg–Si and Al–Fe–Mg–Si quaternary systems at Al-rich corner were constructed, and the solidification structures of Al-12Cu-7Mg-1Fe, Al-14Cu-2Mg-4Si, Al-0.3Fe-6Mg-12Si (wt.%) alloys were analyzed by the Scheil solidification simulation. The calculated results agree well with the previous experimental data. The liquidus projections of three quaternary aluminum alloys at the Al-rich corner were accurately plotted, which could be helpful for the analysis of solidification process of multicomponent alloy systems, and provide an important theoretical basis for the material design of aluminum alloys.
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7

Alexopoulos, Nikolaos D., Vangelis Migklis, Stavros K. Kourkoulis, and Zaira Marioli-Riga. "Fatigue Behavior of Aerospace Al-Cu, Al-Li and Al-Mg-Si Sheet Alloys." Advanced Materials Research 1099 (April 2015): 1–8. http://dx.doi.org/10.4028/www.scientific.net/amr.1099.1.

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Анотація:
In the present work, an experimental study was performed to characterize and analyze the tensile and constant amplitude fatigue mechanical behavior of several aluminum alloys, namely 2024 (Al-Cu), 2198 (Al-Li) and 6156 (Al-Mg-Si). Al-Li alloy was found to be superior of 2024 in the high cycle fatigue and fatigue endurance limit regimes, especially when considering specific mechanical properties. Alloy 6156 was found to have superior constant amplitude fatigue performance that the respective 6xxx series alloys; more than 15% higher endurance limit was noticed against 6061 and almost 30% higher than 6082. Alloy 6156 presented only a marginal increase in fatigue life for the HCF regime.
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8

Asmael, M. B. A., Roslee Ahmad, Ali Ourdjini, and S. Farahany. "Effect of Elements Cerium and Lanthanum on Eutectic Solidification of Al-Si-Cu near Eutectic Cast Alloy." Advanced Materials Research 845 (December 2013): 118–22. http://dx.doi.org/10.4028/www.scientific.net/amr.845.118.

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Анотація:
The properties of Al-Si-Cu cast alloys are strongly affected by eutectic Al-Si and Al-Cu phases. The characteristic parameters of these two phases with additions cerium 1wt % (Ce) and lanthanum1 wt % (La) were investigated in Al-11Si-2Cu near eutectic alloy using computer-aided cooling curve thermal analysis. As a result, the La additive showed the highest (TNAl-Si) while the Ce additive showed very little effect. In addition, the growth temperature (TGAl-Si) is decreased by adding Ce compared to the base alloy and La addition. Additives showed an increase of recalescence magnitude (TRAl-Si). Addition La and Ce increased the nucleation and growth temperature of Al-Cu phase. The microstructure analysis on the silicon morphology showed that 1 wt % La and 1 wt % Ce additions play refiner role in Al-Si-Cu near eutectic alloys. Findings are also confirmed by aspect ratio of eutectic silicon phase.
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Zhang, Huidi, Bin Chen, Jianfei Hao, Huishu Wu, Ming Chen, Weirong Li, Runxia Li, and Biao Wang. "Effects of Cu/Er on Tensile Properties of Cast Al-Si Alloy at Low Temperature." Materials 16, no. 3 (January 17, 2023): 902. http://dx.doi.org/10.3390/ma16030902.

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Анотація:
The current protocol presents the effects of the addition of Cu, rare earth Er, and Cu-Er composite elements on the microstructure of the Al-10Si-0.3Mg alloy. The variations in their low-temperature tensile properties were also investigated. The addition of rare earth Er elements, Cu elements, and Cu-Er composite elements increased the strength of all three groups of alloys when stretched at low temperatures (−60 °C). Further, the elongation of the alloy increased with the addition of Er, while the elongation of the other two groups decreased. The low-temperature (−60 °C) tensile strength of the alloy with the same composition was higher than that at room temperature (20 °C), but the elongation decreased. Notably, by adding rare earth Er to the Al-10Si-0.3Mg alloy, the three-dimensional morphology was changed from coarse dendritic to fine fibrous, the secondary dendritic arm spacing (SDAS) of the alloy was reduced, and the grains were refined. The Al2Cu phase, Al-Si-Cu-Mg quaternary phase, and Cu-rich phase appeared in the alloy with the addition of Cu elements, but the Si phase morphology and α-Al dendrites were not significantly improved. Interestingly, the Si phase morphology of the alloy was improved by adding Cu-Er composite elements, and SDAS was reduced. Still, the Al2Cu phase, Al-Si-Cu-Mg quaternary phase, and Cu-rich phase were not much improved.
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10

Cheng, Xiao Min, Xin Chen, Yuan Yuan Li, and Yong Gang Tan. "Research on the Properties of the Thermal Storage and Corrosion of Al-Si-Cu-Mg-Zn Alloy." Advanced Materials Research 197-198 (February 2011): 1064–72. http://dx.doi.org/10.4028/www.scientific.net/amr.197-198.1064.

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Анотація:
In this paper, various kinds of high-temperature phase change thermal storage Al-Si-Cu-Mg-Zn alloys were prepared, and the thermal properties were studied through integrated thermal analysis. Then the corrosion kinetics of Cr20Ni80 alloy in Al-7% Si alloy and Al-Cu-Mg-Zn alloy at 700°C in thermal cycles were obtained. The microstructures, element concentration and phases in the interface were analyzed by means of metallographic microscope, EPMA and XRD. The results show that all materials phase transition temperatures are during 450°C ~650°C . The total thermal energies of the materials are higher than 900J/cm3. Quaternary alloys and quinary alloys show much more advantages when applying for solar thermal power generation systems. The latent heat depends strongly upon the composition and percentage of elements and the phase composition. Besides, experimental results show that the corrosion rate of Cr20Ni80 alloy in Al-7%Si alloy at 700°C is 0.167mm/h. Under thermal cycling conditions, the corrosion rate of Cr20Ni80 alloy in Al-Cu-Mg-Zn alloy is a little lower and the reaction interface layer does not significantly affect the rate of further corrosion. The corrosion of Al-Si-Cu-Mg-Zn phase change thermal storage materials depends on the content of aluminum element, and nickel-based alloys are not suitable for use as packaging materials.
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Більше джерел

Дисертації з теми "Al-Si-Cu ALLOY"

1

Jain, Syadwad. "Corrosion and protection of heterogeneous cast Al-Si (356) and Al-Si-Cu-Fe (380) alloys by chromate and cerium inhibitors." Columbus, Ohio : Ohio State University, 2006. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1145140821.

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2

Cupido, Llewellyn Heinrich. "Experimental and numerical investigation of heat treatment of al-si-cu alloy." Thesis, Cape Peninsula University of Technology, 2014. http://hdl.handle.net/20.500.11838/1291.

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Анотація:
Dissertation submitted in fulfilment of the requirements for the degree Master of Technology: Mechanical Engineering in the Faculty of Engineering at the Cape Peninsula University of Technology
Aluminium alloys has seen recent increase usage in the automotive industry. This is due to the global obligation towards carbon emission reduction and fuel efficiency in the transport sector. The good strength-to-weight ratio offered by Al-Si-Cu alloys showed promising results towards the compliance of these environmentally friendly criteria. The enhanced mechanical properties is obtained when the alloy is subjected to the T6 heat treatment process, which cause microstructural changes due to the evolution of intermetallic phases. The process involves solution heat treatment, for dissolving soluble Cu- and Mg-containing phases, the homogenization of alloying elements, and the spheroidisation of eutectic Silicon. It is followed by quenching, for maximum precipitation hardening particle retention in solution, and a further artificial ageing process with the aim to acquire a uniform distribution of small precipitates, for strength improvement. The heat treatment schedule applied in this study was conducted as follows: Solution heat treatment at a temperature of 525°C for 6h Quenching in water of temperature 50°C; Artificial ageing for 8h at a temperature of 175°C, and then after left inside furnace to cool down to room temperature. This is higher than the 520°C, but shorter than the 8-12h, observed in literature. Also, quenching is done at a lower temperature rather than 60°C, and artificial ageing at a higher temperature, rather than the 155°C. This was done to be able to draw a comparison between the MAGMASOFT® simulation, which has this non-adjustable schedule, and the experimental results. The simulated and experimental results were comparable and similar outcomes, but with some discrepancies. Such as the porosity was far more visible and intense in the experimental, than what was predicted by the software. The as-cast and heat treated microstructure revealed the expected evolution of intermetallic particles, such as dissolving of the Al2Cu and the spheroidisation of the eutectic Si phases. Another phase that was identified was the insoluble AlFeSi and other possible Fe-containing phases, which due to the higher solution heat treatment temperature, showed partial fragmentation and dissolution. The study provided practical data about the effect of heat treatment on microstructural evolution and how it affects the properties of the Al-Si-Cu alloy. It also brought to the attention and understanding of how critical pouring temperature is, as it affect the initial nucleation, and cooling rate, and therefore the micro and macro properties.
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3

Кушнерьов, О. І., та В. Ф. Башев. "Магнітні властивості багатокомпонентних сплавів системи Cu-Fe-Ni із домішками Al та Si". Thesis, Сумський державний університет, 2017. http://essuir.sumdu.edu.ua/handle/123456789/63905.

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У 2004 р були опубліковані перші роботи, присвячені створенню і дослідженню нового класу матеріалів, так званих високоентропійних сплавів (ВЕС), що можуть включати в себе до 13 основних елементів, в концентраціях від 5 до 35%. У даній роботі за допомогою вібраційного магнітометра досліджені магнітні властивості ВЕС Al0.5CuFeNi та CuFeNiSi0.5 у литому стані. При цьому встановлено, що обидва сплави є феромагнетиками із питомою намагніченістю MS відповідно 28 А·м2/кг та 37 А·м2/кг. Підвищене значення MS для сплаву CuFeNiSi0.5 вочевидь пояснюється наявністю у ньому ОЦК фази, сформованої на основі феромагнітного α-заліза.
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4

Poole, Warren J., H. Proudhon, X. Wang, and Y. Brechet. "The role of internal stresses on the plastic deformation of the Al–Mg–Si–Cu alloy AA6111." Taylor and Francis, 2008. http://hdl.handle.net/2429/416.

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Анотація:
In this work, we have investigated the internal stress contribution to the flow stress for a commercial 6xxx aluminium alloy (AA6111). In contrast to stresses from forest and precipitation hardening, the internal stress cannot be assessed properly with a uniaxial tensile test. Instead, tension-compression tests have been used to measure the Bauschinger stress and produce a comprehensive study which examines its evolution with i) the precipitation structure and ii) a wide range of applied strain. A large set of ageing conditions was investigated to explore the effect of the precipitation state on the development of internal stress within the material. It is shown that the Bauschinger stress generally increases with the applied strain and critically depends on the precipitate average radius and is thus linked to the shearable/non shearable transition. Further work in the case of non-shearable particles shows that higher strain eventually lead to particle fracture and the Bauschinger stress then rapidly decreases. Following the seminal work of Brown et al, a physically based approach including plastic relaxation and particle fracture is developed to predict the evolution of the internal stress as a function of the applied strain. Knowing the precipitation structure main characteristics –such as the average precipitate radius, length and volume fraction– allows one to estimate accurately the internal stress contribution to the flow stress with this model.
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5

Hwang, Junyeon. "Characterization and Mechanical Properties of Nanoscale Precipitates in Modified Al-Si-Cu Alloys Using Transmission Electron Microscopy and 3D Atom Probe Tomography." Thesis, University of North Texas, 2007. https://digital.library.unt.edu/ark:/67531/metadc3661/.

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Анотація:
Among the commercial aluminum alloys, aluminum 319 (Al-7wt%Si-4wt%Cu) type alloys are popularly used in automobile engine parts. These alloys have good casting characteristics and excellent mechanical properties resulting from a suitable heat treatment. To get a high strength in the 319 type alloys, grain refining, reducing the porosity, solid solution hardening, and precipitation hardening are preferred. All experimental variables such as solidification condition, composition, and heat treatment are influence on the precipitation behavior; however, precipitation hardening is the most significant because excess alloying elements from supersaturated solid solution form fine particles which act as obstacles to dislocation movement. The challenges of the 319 type alloys arise due to small size of precipitate and complex aging response caused by multi components. It is important to determine the chemical composition, crystal structure, and orientation relationship as well as precipitate morphology in order to understand the precipitation behavior and strengthening mechanism. In this study, the mechanical properties and microstructure were investigated using transmission electron microscopy and three dimensional atom probe tomography. The Mn and Mg effects on the microstructure and mechanical properties are discussed with crystallographic study on the iron intermetallic phases. The microstructural evolution and nucleation study on the precipitates in the low-Si 319 type aluminum alloys are also presented with sample preparation and analysis condition of TEM and 3DAP tomography.
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6

Bacaicoa, Inigo [Verfasser]. "Effect of heat treatment and iron content on the microstructure and mechanical properties of a secondary Al-Si-Cu alloy / Inigo Bacaicoa." Kassel : Universitätsbibliothek Kassel, 2019. http://d-nb.info/1195721846/34.

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7

Yang, Deyu. "Rôle d'addition de magnésium sur l'occurence de la fonte naissante dans les alliages expérimentaux et commerciaux Al-Si-Cu et son influence sur la microstructure et les propriétés de traction de l'alliage = Role of magnesium addition on the occurence of incipient melting in experimental and commercial Al-Si-Cu alloys and its influence on the alloy microstructure and tensile properties /." Thèse, Chicoutimi : Université du Québec à Chicoutimi, 2006. http://theses.uqac.ca.

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8

Zhang, Gongwang. "THE FORMATION MECHANISM OF α-PHASE DISPERSOIDS AND QUANTIFICATION OF FATIGUE CRACK INITIATION BY EXPERIMENTS AND THEORETICAL MODELING IN MODIFIED AA6061 (AL-MG-SI-CU) ALLOYS". UKnowledge, 2018. https://uknowledge.uky.edu/cme_etds/90.

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Анотація:
AA6061 Al alloys modified with addition of Mn, Cr and Cu were homogenized at temperatures between 350 ºC and 550 ºC after casting. STEM experiments revealed that the formation of α-Al(MnFeCr)Si dispersoids during homogenization were strongly affected by various factors such as heating rate, concentration of Mn, low temperature pre-nucleation treatment and homogenization temperature. Through analysis of the STEM results using an image software Image-Pro, the size distributions and number densities of the dispersoids formed during different annealing treatments were quantitatively measured. It was revealed that increasing the heating rate or homogenization temperature led to a reduction of the number density and an increase in size of the dispersoids. The number density of dispersoids could be markedly increased through a low temperature pre-nucleation treatment. A higher Mn level resulted in the larger number density, equivalent size and length/width ratio of the dispersoids in the alloy. Upsetting tests on two of these Mn and Cr-containing AA6061 (Al-Mg-Si-Cu) Al alloys with distinctive Mn contents were carried out at a speed of 15 mm s-1 under upsetting temperature of 450 ºC after casting and subsequent homogenization heat treatment using a 300-Tone hydraulic press. STEM experiments revealed that the finely distributed α-Al(MnFeCr)Si dispersoids formed during homogenization showed a strong pinning effect on dislocations and grain boundaries, which could effectively inhibit recovery and recrystallization during hot deformation in the two alloys. The fractions of recrystallization after hot deformation and following solution heat treatment were measured in the two alloys with EBSD. It was found that the recrystallization fractions of the two alloys were less than 30%. This implied that the finely distributed α-dispersoids were rather stable against coarsening and they stabilized the microstructure by inhibiting recovery and recrystallization by pinning dislocations during deformation and annealing at elevated temperatures. By increasing the content of Mn, the effect of retardation on recrystallization were further enhanced due to the formation of higher number density of the dispersoids. STEM and 3-D atom probe tomography experiments revealed that α-Al(MnFeCr)Si dispersoids were formed upon dissolution of lathe-shaped Q-AlMgSiCu phase during homogenization of the modified AA6061 Al alloy. It was, for the first time, observed that Mn segregated at the Q-phase/matrix interfaces in Mn-rich regions in the early stage of homogenization, triggering the transformation of Q-phase into strings of Mn-rich dispersoids afterwards. Meanwhile, in Mn-depleted regions the Q-phase remained unchanged without segregation of Mn at the Q-phase/matrix interfaces. Upon completion of α-phase transformation, the atomic ratio of Mn and Si was found to be 1:1 in the α-phase. The strengthening mechanisms in the alloy were also quantitatively interpreted, based on the measurements of chemical compositions, dispersoids density and size, alloy hardness and resistivity as a function of the annealing temperature. This study clarified the previous confusion about the formation mechanism of α-dispersoids in 6xxx series Al alloys. Four-point bend fatigue tests on two modified AA6061 Al alloys with different Si contents (0.80 and 1.24 wt%, respectively) were carried out at room temperature, f = 20 Hz, R = 0.1, and in ambient air. The stress-number of cycles to failure (S-N) curves of the two alloys were characterized. The alloys were solution heat treated, quenched in water, and peak aged. Optical microscopy and scanning electron microscopy were employed to capture a detailed view of the fatigue crack initiation behaviors of the alloys. Fatigue limits of the two alloys with the Si contents of 0.80 and 1.24 wt% were measured to be approximately 224 and 283.5 MPa, respectively. The number of cracks found on surface was very small (1~3) and barely increased with the applied stress, when the applied stress was below the yield strength. However, it was increased sharply with increase of the applied stress to approximately the ultimate tensile strength. Fatigue crack initiation was predominantly associated with the micro-pores in the alloys. SEM examination of the fracture surfaces of the fatigued samples showed that the crack initiation pores were always aspheric in shape with the larger dimension in depth from the sample surface. These tunnel-shaped pores might be formed along grain boundaries during solidification or due to overheating of the Si-containing particles during homogenization. A quantitative model, which took into account the 3-D effects of pores on the local stress/strain fields in surface, was applied to quantification of the fatigue crack population in a modified AA6061 Al alloy under cyclic loading. The pores used in the model were spherical in shape, for simplicity, with the same size of 7 μm in diameter. The total volume fraction of the pores in the model were same as the area fraction of the pores measured experimentally in the alloy. The stress and strain fields around each pore near the randomly selected surface in a reconstructed digital pore structure of the alloy were quantified as a function of pore position in depth from the surface using a 3-D finite element model under different stress levels. A micro-scale Manson-Coffin equation was used to estimate the fatigue crack incubation life at each of the pores in the surface and subsurface. The population of fatigue cracks initiated at an applied cyclic loading could be subsequently quantified. The simulated results were consistent with those experimentally measured, when the applied maximum cyclic stress was below the yield strength, but the model could not capture the sudden increase in crack population at UTS, as observed in the alloy. This discrepancy in crack population was likely to be due to the use of the spherical pores in the model, as these simplified pores could not show the effects of pore shape and their orientations on crack initiation at the pores near surface. Although it is presently very time-consuming to calculate the crack population as a function of pore size and shape in the alloy with the current model, it would still be desirable to incorporate the effects of shape and orientation of the tunnel-shaped pores into the model, in the future, in order to simulate the fatigue crack initiation more accurately in the alloy.
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9

Buha, Joka School of Materials Science &amp engineering UNSW. "Interrupted ageing of Al-Mg-Si-Cu alloys." Awarded by:University of New South Wales. School of Materials Science and engineering, 2005. http://handle.unsw.edu.au/1959.4/20794.

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This thesis systematically investigates the effects of a recently developed modified ageing procedure of aluminium alloys, termed the T6I6 temper, on the microstructural development and mechanical properties of the Al ??? Mg ??? Si - Cu alloy 6061. For the T6I6 temper, a conventional single stage T6 temper is interrupted by an ageing period at a reduced temperature (65??C) to facilitate secondary precipitation, before resuming the final ageing at the temperature of the initial T6 treatment. The T6I6 temper was found to cause simultaneous increases in tensile properties, hardness, and toughness as compared with 6061 T6. Al ??? Mg ??? Si ??? Cu alloys are medium strength alloys widely used in the automotive industry and their further improvement is underpinned by stringent demands for weight reduction placed on the transportation industry in recent years. The potential for further improvement of the mechanical properties was found in the control of secondary precipitation that may take place even in some fully aged alloys when exposed to reduced temperatures. The overall improvement in the mechanical properties of 6061 T6I6 was attributed to the formation of finer and more densely dispersed precipitates in the final microstructure. The refinement of precipitates was facilitated by control of the precipitation processes and gradual evolution of the microstructure throughout each stage of the T6I6 treatment. The results indicated that the concentration and the chemical environment of the vacancies controlled the precipitation processes in this alloy. Findings also show that the proportion of the different precipitate phases present in the final microstructure, as well as the amount of the solute in these precipitates, can be controlled and modified utilizing secondary precipitation. A number of analytical techniques were used in this study. The evolution of the microstructure was studied using Transmission Electron Microscopy (TEM), High Resolution TEM (HRTEM) and Three Dimensional Atom Probe (3DAP). Vacancy-solute interactions were studied using Positron Annihilation Lifetime Spectroscopy (PALS) and 3DAP. The distribution of the solute was studied using 3DAP and Nuclear Magnetic Resonance (NMR). Differential Scanning Calorimetry (DSC) was used to identify precipitation reactions and to determine the stability of vacancy-associated aggregates.
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Sjölander, Emma. "Heat treatment of Al-Si-Cu-Mg casting alloys." Doctoral thesis, Tekniska Högskolan, Högskolan i Jönköping, JTH. Forskningsmiljö Material och tillverkning – Gjutning, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:hj:diva-15695.

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Environmental savings can be made by increasing the use of aluminium alloys in the automotive industry as the vehicles can be made lighter. Increasing the knowledge about the heat treatment process is one task in the direction towards this goal. The aim of this work is to investigate and model the heat treatment process for Al-Si casting alloys. Three alloys containing Mg and/or Cu were cast using the gradient solidification technique to achieve three different coarsenesses of the microstructure and a low amount of defects. Solution treatment was studied by measuring the concentration of Mg, Cu and Si in the α-Al matrix using wavelength dispersive spectroscopy (WDS) after various times at a solution treatment temperature. A diffusion based model was developed which estimates the time needed to obtain a high and homogenous concentration of alloying elements for different alloys, temperatures and coarsenesses of the microstructure. It was shown that the yield strength after artificial ageing is weakly dependent on the coarseness of the microstructure when the solution treatment time is adjusted to achieve complete dissolution and homogenisation. The shape and position of ageing curves (yield strength versus ageing time) was investigated empirically in this work and by studying the literature in order to differentiate the mechanisms involved. A diffusion based model for prediction of the yield strength after different ageing times was developed for Al-Si-Mg alloys. The model was validated using data available in the literature. For Al-Si-Cu-Mg alloys further studies regarding the mechanisms involved need to be performed. Changes in the microstructure during a heat treatment process influence the plastic deformation behaviour. The Hollomon equation describes the plastic deformation of alloys containing shearable precipitates well, while the Ludwigson equation is needed when a supersaturated solid solution is present. When non-coherent precipitates are present, none of the equations describe the plastic deformation well. The evolution of the storage rate and recovery rate of dislocations was studied and coupled to the evolution of the microstructure using the Kocks-Mecking strain hardening theory.
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Книги з теми "Al-Si-Cu ALLOY"

1

Huang, Ze Wen. Study of the ageing behaviour of Al-Mg-Si 6061 and Al-Zn-Mg-Cu 7075 alloys with and without lithium additions. Birmingham: University of Birmingham, 1991.

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Частини книг з теми "Al-Si-Cu ALLOY"

1

Jarfors, Anders E. W., Nils-Erik Andersson, Toni Bogdanoff, Mostafa Payandeh, Salem Seifeddine, Alexander Leickt, and Aron Tapper. "The Portevin-Le Chatelier Effect in a Rheocast Al-Si-Cu Alloy." In Light Metals 2015, 321–25. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2015. http://dx.doi.org/10.1002/9781119093435.ch54.

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Jarfors, Anders E. W., Nils-Erik Andersson, Toni Bogdanoff, Mostafa Payandeh, Salem Seifeddine, Alexander Leickt, and Aron Tapper. "The Portevin-Le Châtelier Effect in a Rheocast Al-Si-Cu Alloy." In Light Metals 2015, 321–25. Cham: Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-48248-4_54.

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Kolobnev, N. I., L. B. Khokhlatova, S. V. Samokhvalov, A. A. Alekseev, S. V. Sbitneva, T. I. Tararaeva, and V. I. Popov. "Heat Treatment Effect on Properties of Al-Mg-Si-Cu 1370 Alloy." In Materials Science Forum, 519–24. Stafa: Trans Tech Publications Ltd., 2006. http://dx.doi.org/10.4028/0-87849-408-1.519.

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Li, Hong-Xiang, Shengli Guo, Peng Du, and Sheng-Pu Liu. "Effect of Cu Content on Microstructure and Properties of Al–Mg–Si Alloy." In Springer Proceedings in Physics, 143–51. Singapore: Springer Singapore, 2019. http://dx.doi.org/10.1007/978-981-13-5944-6_15.

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5

Zhang, Jin Shan, Yong Jun Xue, You Jun Guo, Chun Xiang Xu, and Wei Liang. "Effect of Si on As-Cast Microstructure in Quasicrystalline Al-Cu -Fe Alloy." In Materials Science Forum, 619–22. Stafa: Trans Tech Publications Ltd., 2007. http://dx.doi.org/10.4028/0-87849-432-4.619.

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Bjørge, Ruben, Sigmund J. Andersen, Calin D. Marioara, Joanne Etheridge, and Randi Holmestad. "Aberration-Corrected STEM Study of Precipitates in an Al-Mg-Si-Ge-Cu Alloy." In ICAA13: 13th International Conference on Aluminum Alloys, 3–8. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2012. http://dx.doi.org/10.1002/9781118495292.ch1.

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Oe, Yoshihisa, Kenji Matsuda, Momoko Tokuda, Takeshi Nagai, Tokimasa Kawabata, and Susumu Ikeno. "Effect of Cu or Ag Addition on Two-Step Aging Al-Mg-Si Alloy." In ICAA13: 13th International Conference on Aluminum Alloys, 1267–70. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2012. http://dx.doi.org/10.1002/9781118495292.ch193.

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Bjørge, Ruben, Sigmund J. Andersen, Calin D. Marioara, Joanne Etheridge, and Randi Holmestad. "Aberration-Corrected STEM Study of Precipitates in an Al-Mg-Si-Ge-Cu Alloy." In ICAA13 Pittsburgh, 3–8. Cham: Springer International Publishing, 2012. http://dx.doi.org/10.1007/978-3-319-48761-8_1.

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Oe, Yoshihisa, Kenji Matsuda, Momoko Tokuda, Takeshi Nagai, Tokimasa Kawabata, and Susumu Ikeno. "Effect of Cu or Ag Addition on Two-Step Aging Al-Mg-Si Alloy." In ICAA13 Pittsburgh, 1267–70. Cham: Springer International Publishing, 2012. http://dx.doi.org/10.1007/978-3-319-48761-8_193.

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Amirkhanlou, Sajjad, Yijie Zhang, Shouxun Ji, and Zhongyun Fan. "Young’s Modulus of Al–Si–Mg–Cu Based Alloy Under Different Heat Treatment Processes." In Light Metals 2017, 335–42. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-51541-0_44.

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Тези доповідей конференцій з теми "Al-Si-Cu ALLOY"

1

Futas, Peter. "FLUIDITY OF AL � SI � CU ALLOY: TESTS AND COMPUTER SIMULATION." In 18th International Multidisciplinary Scientific GeoConference SGEM2018. Stef92 Technology, 2018. http://dx.doi.org/10.5593/sgem2018/2.1/s07.051.

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2

Ma, Hong, Peihao Geng, and Guoliang Qin. "Effect of Alloying Elements of Al Alloy on the Interfacial Microstructure and Fracture Behaviour of Al Alloy/Steel Inertia Friction Welded Joint: A Comparative Study." In ASME 2022 17th International Manufacturing Science and Engineering Conference. American Society of Mechanical Engineers, 2022. http://dx.doi.org/10.1115/msec2022-85196.

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Abstract The present study highlighted the effect of alloying elements in Al alloy on the interfacial microstructure, and the corresponding fracture behaviour of the Al alloy/steel inertia friction welded joint by selectively adopting two types of Al alloys. A strong texture of <111>//radial direction was formed on the Al alloy side in both types of joints, while no obvious changes were identified on the steel side. Different types of intermetallic compounds (IMCs) were formed at the weld interface. In the Al-Mg-Si alloy/steel joint produced at a low heat input, the interfacial microstructure was composed of a nanoscale amorphous layer and partially crystallised layer, while it turned into a fully crystallised Fe2Al5 phase with Si enriched when the heat input was enhanced. In the Al-Cu alloy/steel joint, Cu was enriched at the weld interface, with the possible formation of Fe-Al-Cu based IMCs. Moreover, a two-layered structure of IMC with different compositions of Cu appeared when the joint was prepared at a high heat input. Such distinct interfacial microstructure caused different fracture behaviours of joints. An interfacial reaction layer less than 130 nm thick led to the failure of Al alloy rather than the weld interface which easily happened at a thicker IMC.
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3

Onoda, H., E. Takahashi, S. Madokoro, H. Fukuyo, and S. Sawada. "The improvement of Al-Si-Cu alloy interconnects by hafnium and boron addition." In Digest of Technical Papers.1990 Symposium on VLSI Technology. IEEE, 1990. http://dx.doi.org/10.1109/vlsit.1990.111006.

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4

Dong, Zhong-Li, Xue Luo, Xiao-Qiang Li, Jing-Mao Li, Ming Nie, and Qing Xiao. "Development of Al-Si-Cu-Zn-Mn Filler Metal for Brazing 3003 Aluminum Alloy." In The 2nd Annual International Workshop on Materials Science and Engineering (IWMSE 2016). WORLD SCIENTIFIC, 2017. http://dx.doi.org/10.1142/9789813226517_0043.

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5

Campbell, Sylvia, John Stearns, and Paulo Morais. "A High Strength Aluminum Solution for Polymer Coated Bearings." In WCX SAE World Congress Experience. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 2023. http://dx.doi.org/10.4271/2023-01-0077.

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<div class="section abstract"><div class="htmlview paragraph">Aluminum-tin (Al-Sn) and aluminum-tin-silicon (Al-Sn-Si) alloy lined bimetals have traditionally been utilized in rod and main bearing applications in light duty gasoline engines due to their combination of strength and soft-phase properties, such as embeddability and conformabilty. The load carrying capability of Al-Sn-Si alloys can be further increased by applying a polymer overlay, but recent advances in engine design, to improve efficiency and reduce CO<sub>2</sub> emissions, have resulted in maximum specific load requirements beyond the performance limits of current Al-Sn-Si-Cu products. In these instances, the usual option would be to specify a lead-free bronze-based bearing solution, which has increased strength, but necessitates greater weight and brings a significant cost disadvantage over aluminum products. To address these problems, we have developed a novel high strength aluminum lined bimetal for use with a polymer coating, which offers a significant advantage in load carrying capability over traditional Al-Sn-Si-Cu alloys. The novel high strength developed alloy employs an Al-Mn-Mg substrate, which is roll bonded to a steel backing. Bearing rig testing has demonstrated a significant improvement in fatigue performance over the highest rated Al-Sn-Si bearing alloy and an acceptable level of seizure and wear performance. Initial particle tolerance test results are encouraging. A 900-hour thermal shock engine test established the potential of the development alloy to perform satisfactorily in an application which typically uses a more costly bronze-based bearing solution.</div></div>
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Lombardi, Anthony, Glenn Byczynski, Buddhika Guruwatta Vidanalage, Areej Fatima, and Narayan Kar. "Development of a Novel High Strength Aluminum-Cerium Based Rotor Alloy for Electric Vehicle Induction Motor Applications." In WCX SAE World Congress Experience. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 2023. http://dx.doi.org/10.4271/2023-01-0878.

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<div class="section abstract"><div class="htmlview paragraph">To increase vehicle range, light weighting of electric vehicles has been extensively researched and implemented by using aluminum intensive solutions. With regards to traction motors, aluminum alloys that have a desired combination of high electrical conductivity and strength are required for high power output and efficiency. In this research, a novel Al-Ce based alloy, with minor additions of Si and Mg for strengthening, was investigated in different heat treatment tempers to maximize mechanical properties while maintaining a high electrical conductivity. This new alloy system appears to have addressed the classic conundrum of the inverse relationship of mechanical performance verses electrical conductivity for traditional aluminum alloy systems. The results suggest that the Al-Ce-Si-Mg alloy had yield strength in excess of 120 MPa and electrical conductivity of at least 50 %IACS in the T5 and T6 conditions. Simulations of a squirrel cage induction machine show that this combination of properties resulted in similar motor performance to other rotor Al alloys. As a result, the Al-Ce-Si-Mg alloy is a promising alternative to the near pure Al or Cu-based alloys that are currently used in induction motor rotor castings.</div></div>
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Naiju, CD, Krishnamoorthy Annamalai, and Jayakumar Thangaraj. "Investigation of Wear and Corrosion Behavior of Aluminum Metal Matrix Composites for Automotive Applications." In International Conference on Advances in Design, Materials, Manufacturing and Surface Engineering for Mobility. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 2020. http://dx.doi.org/10.4271/2020-28-0461.

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<div class="section abstract"><div class="htmlview paragraph">This research is an attempt to investigate the possibility of enhancing wear and corrosion behaviour of aluminium alloy and composites for high-temperature applications. The 319 alloys with minor additions of Ni, Ti and Fe elements using the liquid metallurgy technique, Al-Si-Cu-Mg matrix alloy (Al alloy) was obtained and it was used as a base alloy and it is reinforced with Silicon carbide (SiC), Magnesium oxide (MgO) under the following composites, namely Al alloy/3wt % MgO (AA-SRM), Al alloy/ 3wt % SiC (AA-SRS) and Al alloy/3wt %SiC-3wt % MgO (AAHRSM) using a stir casting route. The wear test was investigated under the following factors, namely constant sliding velocity 3.21 m/s, sliding distance up to 10000 m under different loadings (4.9, 9.8, 14.7, 19.62, and 24.5 N) using wear test by a pin on the disc test rig. The wear rate was calculated using the tested samples under different loadings, sliding distance, and weight concentration conditions. Morphology studies of the Aluminium alloy and composites samples and their worn surface structure were examined using SEM. Finally, the corrosion test was analyzed under various environmental conditions using the specimen immersion technique. The Al-Si-Cu-Mg alloy and metal matrix composites samples were immersed for 120 hours in the concentration 0.3M H2SO4, 3.5 weight concentration NaCl, and 0.1M NaOH solution at room temperature condition. The rate of corrosion was calculated using the weight loss method.</div></div>
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Fellicia, Dian Mughni, Rochman Rochiem, Na'il Akbar, and M. Abi Rafdi. "Review: The effect of alloy element on the microstructure and mechanical properties of Al-Si-Mg-Cu alloy during heat treatment." In THE 4TH INTERNATIONAL CONFERENCE ON MATERIALS AND METALLURGICAL ENGINEERING AND TECHNOLOGY (ICOMMET) 2020. AIP Publishing, 2021. http://dx.doi.org/10.1063/5.0072323.

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9

Marrocco, T., L. C. Driver, S. J. Harris, and D. G. McCartney. "Microstructure and Properties of Thermally Sprayed Al-Sn based Alloys for Plain Bearing Applications." In ITSC2006, edited by B. R. Marple, M. M. Hyland, Y. C. Lau, R. S. Lima, and J. Voyer. ASM International, 2006. http://dx.doi.org/10.31399/asm.cp.itsc2006p0625.

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Abstract Al-Sn plain bearings for automotive applications traditionally comprise a multilayer structure. Conventionally, bearing manufacturing involves casting the Al-Sn alloy and roll¬bonding to a steel backing strip. Recently, high velocity oxy- fuel thermal spraying has been employed as a novel alternative manufacturing route. The present project extends previous work on ternary Al-Sn- Cu alloys to quaternary systems, which contain specific additions for potentially enhanced properties. Two alloys were studied in detail, namely Al-20wt.%Sn-lwt.%Cu-2wt.%Ni and Al-20wt.%Sn-lwt.%Cu-7wt.%Si. This paper will describe the microstructural evolution of these alloys following HVOF spraying onto steel substrates and subsequent heat treatment. Microstructures of powders and coatings were investigated by scanning electron microscopy and phases identified by X-ray diffraction. Coating microhardnesses were determined in both as-sprayed and heat treated conditions and differences related to the microstructures which developed. Finally, the wear behaviour of the sprayed and heat treated coatings in hot engine oil was measured using an industry standard test and compared with that of conventionally manufactured Al-Sn bearings.
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Shvets, Karina, Gulnara Khalikova, Elena Korznikova, and Vadim Trifonov. "Structure and microhardness of Al–Si–Cu–Ni alloy after severe plastic deformation and high-temperature annealing." In ADVANCED MATERIALS WITH HIERARCHICAL STRUCTURE FOR NEW TECHNOLOGIES AND RELIABLE STRUCTURES. AIP Publishing LLC, 2015. http://dx.doi.org/10.1063/1.4932903.

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Звіти організацій з теми "Al-Si-Cu ALLOY"

1

Turchi, Patrice E. A. Thermodynamic, Kinetic, and Physical Properties of Ag-Al-Cu-Ni-Si-Zn Alloys. Office of Scientific and Technical Information (OSTI), May 2018. http://dx.doi.org/10.2172/1440721.

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