中国有色金属学报(英文版)
Transactions of Nonferrous Metals Society of China
| Vol. 36 No. 3 March 2026 |
（a Institute of New Energy and Low-Carbon Technology, Sichuan University, Chengdu 610207, China;
b School of Materials Science and Engineering, Sichuan University, Chengdu 610065, China;
c Engineering Research Center of Alternative Energy Materials & Devices of Ministry of Education, Sichuan University, Chengdu 610065, China）
Abstract:The microstructure and mechanical properties of ZK60 extruded alloy by rapid solidification (RS) and as-cast ingot processes were investigated using optical microscope, scanning electron microscope, X-ray diffraction, electron back-scatter diffraction, and mechanical tests. The results show that the RS ZK60 extruded alloy exhibits relatively high tensile yield strength (TYS), compressive yield strength (CYS) and elongation of 300.8 MPa, 303.6 MPa and 18.6%, respectively. The RS ZK60 extruded alloy with an ultra-fine grain size of 1.28 μm not only has a weak texture with a maximum polar density of 3.3 but also addresses the tension-compression asymmetry with a CYS/TYS ratio of approximately 1.0. The calculation of the strengthening mechanism indicates that the improvement in the mechanical properties of the RS ZK60 extruded alloy is primarily attributed to grain refinement.
Key words: ZK60 magnesium alloy; rapid solidification; hot extrusion; tension-compression asymmetry; texture; strengthening mechanism
