A comparative study on the effects of the omega and alpha phases on the temperature dependence of shape memory behavior of a Ti-27Nb alloy

作者：Al Zain Yazan; Kim Hee Young^*; Koyano Tamotsu; Hosoda Hideki; Miyazaki Shuichi

来源：Scripta Materialia, 2015, 103: 37-40.

DOI：10.1016/j.scriptamat.2015.02.032

• Ti-based shape memory alloys
• omega phase
• Superelasticity
• Shape memory effect
• Martensitic transformation

While the stress for inducing the martensitic transformation in a Ti-27Nb alloy changed only slightly on aging, the stress at which the martensite phase starts to plastically deform and the ultimate tensile strength increased on aging due to the formation of thermal omega phase or alpha phase. An anomalous temperature dependence of the shape memory behavior was also observed and explained by the fact that the thermal omega phase encouraged the formation of the athermal omega phase during cooling.

• 出版日期2015-7-1