Development and Application of a New Al-Si-Mg Alloy for Semi-Solid Forming

Abstract:

Based on A356, development and application of a new Al-Si-Mg alloy had been studied, aimed to get an alloy with excellent mechanical property and suitable for semi-solid forming. An adjustment of Mg content is made, from 1% to 2.5%, to ensure the composition range. The temperature range of semi-solid alloys can be obtained through the phase calculation on the alloys with T-cal, a kind of thermodynamic software. The accuracy of phase can be verified with differential scanning calorimeter (DSC). The chosen alloys are melted to be prepared for specimens, followed by mechanical testing. Finally, the optimal composition can be got according to mechanical properties, to be used for electromagnetic continuous casting, followed by the induction reheating and thixotropic semi-solid forming process. The law analyses were discussed during the induction reheating for Al-Si-Mg alloy and A356.

• Periodical: Advanced Materials Research (Volumes 476-478)
• Pages: 670-675
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.476-478.670
• Online since: February 2012
• Authors: Xiao Hu Pei, Yi Tao Yang
• Keywords: Al-Si-Mg Alloy, Mechanical Property, Phase Calculation, Semi-Solid Processing

References

[1] Kazakov, Atkinson, HelenV. Thixoforming of Otherwise Wrought Aluminum Alloys: Thermodynamic Prediction of Amenable Compositions. Proceedings of the 5th International ESAFORM Conference on Material Forming, 2002, pp.655-658

[2] Bi-cheng Yang,, Jun-Xu, Zhan-feng Tian. The research for Semi-solid aluminum AlSi6MgZ heating process [J].Thermalprocessing.2005,34(6):37-39. (In Chinese)

[3] Shi-Lin Zhang, Song-zan Ren. Concise Handbook aluminum [M].Shanghai：Shanghai Science and Technology Literature Publishing House，2006:11-12. (In Chinese)

[4] Rong-zhang Tian. Cast aluminum alloy [M].Hunan：Central South University Press，2006：101. (In Chinese)

[5] Zhong-Tu Yu，Heng-hua Zhang，Guang-Jie Shao. Semi-solid Forming Research of aluminum alloy and the mechanical properties [J]. Metal forming process，2003，21(4)：58-61(In Chinese)

[6] National Standard of Republic of China GBT288-2002- tensile test method for metallic materials at room temperature (In Chinese)

[7] MAO W M, CUI C L, ZHAO A M, et al. Dynamical coarsening processes of microstructures in non-dendritic AlSi7Mg alloy remelted in semi-solid state [J]. Trans. Nonferrous Metal. Soc. China, 2000, 10(1):25-28.

[8] Xiaohu Pei, Yi-tao Yang. Reheated process optimization for A356 aluminum alloy billet of semi-solid forming [J].Special Casting and Nonferrous Alloys.2011,31(5):428-431. (In Chinese)