|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Magnesium Technology 2017
||Effect of Ca on the Microstructure, Texture and Mechanical Properties in Mg-Zn-Mn Based Alloy
||Byeong-Chan Suh, Taisuke Sasaki, Taiki Nakata, Shigeharu Kamado, Kazuhiro Hono
|On-Site Speaker (Planned)
In order to broaden the applications of magnesium alloys, there is a strong demand for the development of Mg alloy sheets deformable at room temperature. We investigated the effect of Ca addition on the microstructures and mechanical properties of Mg-4Zn-0.4Zr (ZK40) (wt.%) hot-rolled sheets. The solution treated ZK40 and ZKX400 alloys exhibit bimodal grain structures. While coarse unrecrystallized grains remain in the ZK40, fully recrystallized grain structure is formed in the ZKX400. The addition of Ca results in texture weakening with substantial decrease in the maximum (0001) pole intensity from 13.4 to 4.8. This leads to a substantial improvement of index Erichsen value from 3.5 to 7.5 mm. The tensile yield strength of ZKX400 is 176 MPa, which is higher than that of ZK40, 160 MPa. Since Mg-Zn based alloys are precipitation hardening system, further compositional optimization is expected to increase the strength of the deformed sheet by artificial aging.