Extraordinary Room-Temperature Tensile Ductility of Pure Magnesium

Xinghao Du; Haitao Chang; Cai Chen; Xiaofeng Huo; Wanpeng Li; Jacob C Huang; Guosheng Duan; Baolin Wu

doi:10.3390/ma12233813

Extraordinary Room-Temperature Tensile Ductility of Pure Magnesium

Materials (Basel). 2019 Nov 20;12(23):3813. doi: 10.3390/ma12233813.

Authors

Xinghao Du¹, Haitao Chang¹, Cai Chen^{1

2}, Xiaofeng Huo¹, Wanpeng Li³, Jacob C Huang³, Guosheng Duan¹, Baolin Wu¹

Affiliations

¹ School of Materials Science & Engineering, Shenyang Aerospace University, Shenyang 110136, China.
² School of Materials Science & Engineering, Shanghai Jiao Tong University, Shanghai 200240, China.
³ Department of Materials Science & Engineering, City University of Hong Kong, Kowloon 999077, Hong Kong, China.

Abstract

Room-temperature tensile behavior and associated deformation mechanisms of multiple-axial forged (MAFed) pure Mg has been investigated. The as-MAFed Mg, with a coarsely recrystallized structure, exhibited a balanced strain-hardening behavior with strain, resulting in extraordinary mechanical properties with high ultimate stress (~200 MPa) and extensive true strain (~0.30). The observation on the microstructural evolution suggests that the balanced strain-hardening behavior is correlated with de-twinning behavior cooperated with pyramidal <c + a> dislocations at the plastic straining stage.

Keywords: mechanical properties; multiple-axial forging; pure Mg; pyramidal dislocations; strain hardening.