High temperature strain glass in Ti-Au and Ti-Pt based shape memory alloys

• 来源期刊: 中国物理B（英文版）
• 年，卷（期）: 2021,（1）
• 页码范围: 121-126
• 页数: 6页
• 语种: 英文
• DOI: 10.1088/1674-1056/abc54a

摘要

Strain glass is a frozen short-range strain ordered state found in shape memory alloys recently, which exhibits novel properties around the ideal glass transition temperature T0. However, the T0 of current strain glass systems is still very low, limiting their potential applications and experimental studies. In this paper, we reported two new strain glass systems with relatively high T0. In Ti50Au50?xCrx alloys, the strain glass appears at x=25, and exhibits a T0 of 251 K, while inTi50Pt50?yFey alloys, the strain glass takes place at y=30, and shows a T0 of 272 K. Both of them are comparable withthe highest T0 value reported so far. Moreover, the phase diagrams of main strain glass systems in Ti-based alloys were summarized. It is found that the influence of the martensitic transformation temperature of the host alloy on the T0 of the strain glass is limited. This work may help to design new strain glass systems with higher T0 above ambient temperature.