Isothermal martensitic transformation behavior of Ti-Nb-O alloy

被引:8
|
作者
Tahara, Masaki [1 ]
Inamura, Tomonari [1 ]
Kim, Hee Young [2 ]
Miyazaki, Shuichi [2 ,3 ]
Hosoda, Hideki [1 ]
机构
[1] Tokyo Inst Technol, Inst Innovat Res, Lab Mat & Struct, Midori Ku, 4259 Nagatsutacho, Yokohama, Kanagawa 2268503, Japan
[2] Univ Tsukuba, Div Mat Sci, 1-1-1 Tennodai, Tsukuba, Ibaraki 3058573, Japan
[3] Fdn Adv Int Sci, 3-24-16 Kasuga, Tsukuba, Ibaraki 3050821, Japan
关键词
Martensitic transformation; Titanium alloys; Interstitials; Isothermal transformation; Shape memory materials; Phase transformation; BETA; DIFFUSION; TITANIUM; SUPERELASTICITY; NIOBIUM; PHASE;
D O I
10.1016/j.matlet.2019.126691
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
The isothermal martensitic transformation (IMT) behavior of Ti-20Nb-0.7O (mol %) alloy was investigated via X-ray diffractometry. Isothermal formation of the alpha '' martensite phase was observed, and the activation energy was determined using the time-temperature-transformation diagram coupled with differential scanning calorimetry. IMT in Ti-20Nb-0.7O alloy was explained by nanometer-sized local lattice modulations (nanodomains) and diffusion of oxygen atoms in the I phase. The latter was found to be the primary rate-determining process. (C) 2019 Elsevier B.V. All rights reserved.
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页数:3
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