|About this Abstract
||2022 TMS Annual Meeting & Exhibition
||Phase Transformations and Microstructural Evolution
||Thermoelastic Martensitic Transformation in Mn-rich Mn-Cu-Al BCC Alloys
||Tatsuya Ito, Xiao Xu, Toshihiro Omori, Ryosuke Kainuma
|On-Site Speaker (Planned)
Cu-Al-Mn ternary alloys are known as the first discovered Heusler alloys, and the BCC structure has a broad region of solid solution. These alloys show thermoelastic martensitic transformations from the BCC to the monoclinic or tetragonal structures in the Cu-rich regions. They exhibit shape memory effect and superelasticity, which have been utilized for applications such as medical clips for ingrown nails. However, the research has been limited to the Cu-rich region because the martensitic transformation temperature decreases by the addition of either Mn or Al. In this work, we investigated the phase equilibria, microstructures and crystal structures in Mn-rich Mn-Cu-Al alloys. As a result, we found a thermoelastic martensitic transformation for the first time near the BCC/FCC phase boundary. The martensitic transformation temperatures and crystal structures will be reported in this presentation.
||Phase Transformations, Copper / Nickel / Cobalt, Other