Effect of Heat Treatment on Microstructure and Mechanical Properties of MA2-1 Alloy Sheet

Abstract:

Effect of heat treatment on the microstructure and mechanical properties of high purity MA2-1(Mg-5wt.%Al-1wt.%Zn-0.4wt.%Mn) alloy sheet were investigated. X-ray diffraction analysis indicated that the microstructure of high purity MA2-1 alloy sheet annealed consisted of α-Mg solid solution, β (Mg17Al12) phase and Al-Mn phases such as Al6Mn and Al10Mn3. β phase dissolved into α-Mg solid solution during the solution treatment and formed supersaturated α-Mg solid solution. After aging at the temperatures of 423 K, 473 K and 523 K for 12 hours, β phase precipitated from the supersaturated α-Mg solid solution. Optical microscope observation found that the grain size of the MA2-1 alloy sheet became larger after heat treatment. As a result, the mechanical properties of the MA2-1 alloy sheet such as the tensile strength and yield strength declined after the heat treatment.

• Periodical: Materials Science Forum (Volumes 488-489)
• Pages: 151-154
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.488-489.151
• Online since: July 2005
• Authors: Weichao Zheng, Xiao Li Sun, Peijie Li, Daben Zeng, L.B. Ber
• Keywords: Heat Treatment, MA2-1 Alloy Sheet, Mechanical Property, Microstructure, Wrought Magnesium Alloy

References

[1] A. Styczynski, Ch. Hartig, J. Bohlen and D. Letzig: Scripta Materialia 50 (2004), pp.943-947.

DOI: 10.1016/j.scriptamat.2004.01.010

[2] J.C. Tan, M.J. Tan: Materials Science and Engineering A339 (2003), pp.124-132.

[3] Bai Ding: World Nonferrous Metals, 2003, No. 4, pp.62-65.

[4] Xiao Xiaoling, Luo Chengping, Nie Jianfeng and B.C. Muddle: Acta Metallurgica Sinica, 2001, No. 1, pp.1-7.

[5] Luo Chengping, Xiao Xiaoling, Liu Jiangwen, Nie Jianfeng and B.C. Muddle: Acta Metallurgica Sinica, 2002, No. 7, pp.709-714.

[6] D. Duly, J.P. Simon and Y. Brechet: Acta Metallurgica Materialia, 1995, Vol. 43, No. 1, pp.101-106.

DOI: 10.1016/0956-7151(95)90266-x