Author(s)

Xiaoping Luo^1,2, Daqing Fang³, Baosheng Liu^1,2

¹College of Materials Science and Engineering, Taiyuan University of Science and Technology, Taiyuan, China.
²Engineering Research Center for Magnesium Alloys of Shanxi Province, Taiyuan University of Science and Technology, Taiyuan, China.
³College of Materials Science and Engineering, Xi’an Jiaotong University, Xi’an, China.

The mechanical properties and microstructure of an as-cast Mg-5.0Sn-1.0Mn-0.4Zr alloy were investigated during thermo mechanical treatments consisting of hot extrusion, rolling, and ageing at 200°C. The results indicate that only Mg₂Sn phases formed in the Mg matrix, Mn and Zr do not cause the formation of any new phases. The average grain size, tensile strength and elongation were 22 μm, 285 MPa, and 14.5%, respectively, after extrusion + rolling + ageing treatment (ERA). The mechanical properties of ERA alloys with a peak hardness of 81 HV and 6.7% are improved compared with those of EA (extrusion + ageing treatment) samples; these changes are attributed to grain refinement and solid solution strengthening, age hardening, and precipitation strengthening.

Mg-Sn-Mn-Zr Alloy, Thermomechanical Treatment, Microstructure, Mechanical Properties

Luo, X. , Fang, D. and Liu, B. (2018) Thermo-Mechanical Treatment on Microstructure and Mechanical Properties of Mg-5.0Sn-1.0Mn-0.4Zr Alloy. Advances in Materials Physics and Chemistry, 8, 44-50. doi: 10.4236/ampc.2018.81004.