Effect of Hot Rolling on the Microstructure and Mechanical Performance of a Mg-5Sn Alloy

Xiaoru Zhuo; Cong Shao; Peng Zhang; Zhichao Hu; Huan Liu

doi:10.3390/ma15175973

Effect of Hot Rolling on the Microstructure and Mechanical Performance of a Mg-5Sn Alloy

Materials (Basel). 2022 Aug 29;15(17):5973. doi: 10.3390/ma15175973.

Authors

Xiaoru Zhuo^{1

2

3}, Cong Shao², Peng Zhang¹, Zhichao Hu¹, Huan Liu^{2

4}

Affiliations

¹ Nanjing Institute of Agricultural Mechanization, Ministry of Agriculture and Rural Affairs, Nanjing 210014, China.
² College of Mechanics and Materials, Hohai University, Nanjing 211100, China.
³ College of Engineering, Nanjing Agricultural University, Nanjing 210031, China.
⁴ Jiangsu Key Laboratory for Light Metal Alloys, Nanjing Yunhai Special Metals Co., Ltd., Nanjing 211200, China.

Abstract

A Mg-5Sn alloy was hot rolled at 380 °C with three different rolling reductions (30%, 50%, and 70%), and its effect on the microstructure and mechanical performance was examined. Grain size decreases, whereas the area fraction of Mg₂Sn particles and dislocation density increase with the increase in rolling reduction. Therefore, the yield strength (YS) and ultimate tensile strength (UTS) exhibit an ascending trend, whereas the elongation (EL) shows a descending trend with increasing rolling reduction. The alloy hot rolled for 70% possesses a high strength of 310 MPa and an EL of 8.4%. The strength enhancement is mainly ascribed to precipitation strengthening, grain refinement strengthening, and dislocation strengthening.

Keywords: Mg-Sn alloy; ductility; rolling; strength; strengthening mechanism.

Abstract

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