Plastic deformation behaviour of single-crystalline martensite of Ti-Nb shape memory alloy

被引：35

作者：

Tahara, Masaki ^{[1
,2
]}

Okano, Nao ^{[3
,4
]}

Inamura, Tomonari ^{[1
,2
]}

Hosoda, Hideki ^{[1
,2
]}

机构：

[1] Tokyo Inst Technol, Inst Innovat Res, Lab Mat & Struct, Midori Ku, 4259 Nagatsutacho, Yokohama, Kanagawa 2268503, Japan

[2] Tokyo Inst Technol, Inst Innovat Res, Lab Future Interdisciplinary Res Sci & Technol, Midori Ku, 4259 Nagatsutacho, Yokohama, Kanagawa 2268503, Japan

[3] Tokyo Inst Technol, Midori Ku, 4259 Nagatsutacho, Yokohama, Kanagawa 2268503, Japan

[4] Nippon Steel Sumitomo Met Corp, 1-8 Fusoucho, Amagasaki, Hyogo 6600891, Japan

来源：

SCIENTIFIC REPORTS | 2017年 / 7卷

基金：

日本学术振兴会;

关键词：

MECHANICAL-PROPERTIES; SUPERELASTIC PROPERTIES; GAMMA-1; MARTENSITE; TRANSFORMATION; MICROSTRUCTURE; ORIENTATION; TEMPERATURE; TEXTURE; STRESS; STRAIN;

D O I：

10.1038/s41598-017-15877-6

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

beta-Ti alloys have attracted considerable attention as new biomedical shape memory alloys. Given the critical importance of the plastic deformation in the martensite phase for the shape memory effect and superelasticity, we investigated here the plastic deformation behaviour of a single crystal of a. (orthorhombic) martensite of Ti-27 mol% Nb shape memory alloy obtained by the stress-induced martensitic transformation of a single crystal of the parent beta phase. Four operative plastic deformation modes were observed, including two dislocation slips and two twinnings. To the best of our knowledge, two of these plastic deformation modes (one dislocation slip and one twinning) were discovered for the first time in this study. The identified slip and twinning systems in the martensite phase have corresponding slip and twinning systems in the parent beta phase with which they share many similarities. Therefore, we believe that the plastic deformation of the a. martensite is inherited from that of the parent beta phase.

引用

页数：11