A comparative study on the effects of the ω and α phases on the temperature dependence of shape memory behavior of a Ti–27Nb alloy. (1st July 2015)

• Record Type: Journal Article
• Authors: Al-Zain, Yazan; Kim, Hee Young; Koyano, Tamotsu; Hosoda, Hideki; Miyazaki, Shuichi
• Is Part Of: Scripta materialia. Volume 103(2015)
• Page Start: 37
• Page End: 40
• Publication Date: 2015-07-01
• Subjects: Ti-based shape memory alloys -- ω phase -- Superelasticity -- Shape memory effect -- Martensitic transformation; Materials -- Periodicals; Metallurgy -- Periodicals; Metalen; Legeringen; Materiaalkunde; Metals, metalworking and machinery industries; Metals; Electronic journals; 620.11
• DOI: 10.1016/j.scriptamat.2015.02.032
• Languages: English
• ISSNs: 1359-6462

Abstract

Abstract : 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 ω phase or α phase. An anomalous temperature dependence of the shape memory behavior was also observed and explained by the fact that the thermal ω phase encouraged the formation of the athermal ω phase during cooling.