Effect of Heat Treatment on Microstructure and Mechanical Properties of MA2-1 Alloy Sheet
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.
W.Ke, E.H.Han, Y.F.Han, K.Kainer and A.A.Luo
W. Zheng et al., "Effect of Heat Treatment on Microstructure and Mechanical Properties of MA2-1 Alloy Sheet", Materials Science Forum, Vols. 488-489, pp. 151-154, 2005