|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Phase Transformations and Microstructural Evolution
||Mg-Sc-based Alloy and Its Functionality
||Daisuke Ando, Yukiko Ogawa, Yuta Takeuchi, Yuji Sutou, Junichi Koike
|On-Site Speaker (Planned)
Mg alloys have been expected as a next generation structural material for decade years. However, because of low formability, low corrosion resistance and high cost, Mg alloys have not been used widely yet. Therefore, in order to break the wall, our group have attempted to add some functionality, such as high strength, super-elasticity and shape memory effect into Mg alloys using metastable BCC phase in Mg-Sc alloys. This alloy shows ultra-high strength after aging due to fine HCP precipitation from BCC matrix. Furthermore, the alloys show super-elasticity of 4.4% at -150°C and shape recovery upon heating. The shape memory properties are caused by reversible martensitic transformation. Its density is around 2 g/cm3, which is one-third less than that of practical TiNi Shape memory alloy. The study shows a possibility to use metastable BCC phase for novel microstructural control and adding functionality into Mg alloys.
||Planned: Supplemental Proceedings volume