Investigation of Microstructure and Mechanical Properties of Zk60 Magnesium Alloy Achieved by Extrusion-Shearing Process

Wrought magnesium alloys often show significant tension-compression yield asymmetry, which can hardly be applied in large-scale industries. This work aimed to investigate the tension-compression yield asymmetry of ZK60 magnesium alloys during extrusion. ZK60 magnesium alloys were extruded at 473 K through the extrusion-shearing (ES) process. Microstructure evolution and mechanical properties of ZK60 magnesium alloys were investigated by optical microscopy (OM), X-ray diffractometry (XRD) and electron back-scattered diffraction (EBSD). The results showed that the grain size is refined to 1.7±0.35μm and the microstructure becomes more uniform. The tensile yield strength of ZK60 magnesium alloy at room temperature is 263.5±6.36 MPa, which is 35.5% higher than that of as-annealed. The tension-compression asymmetry of ZK60 magnesium alloys was significantly improved, which is mainly related to the reduction of the texture intensity of the basal plane.

Keywords: ZK60 magnesium alloy, extrusion-shearing process, tension-compression yield asymmetry, mechanical properties

Suggested Citation: Suggested Citation

Shi, Fengjian and Piao, Nanying and Wang, Hao and Wang, Jiheng and Zang, Qianhao and Guo, Yuhang and Chen, Cai and Zhang, Lu, Investigation of Microstructure and Mechanical Properties of Zk60 Magnesium Alloy Achieved by Extrusion-Shearing Process. Available at SSRN: https://ssrn.com/abstract=4421773 or http://dx.doi.org/10.2139/ssrn.4421773