Cyclic degradation in bamboo-like Fe-Mn-Al-Ni shape memory alloys - The role of grain orientation

被引：60

作者：

Vollmer, M. ^{[1
,2
]}

Krooss, P. ^{[1
,2
]}

Kriegel, M. J. ^{[3
]}

Klemm, V. ^{[3
]}

Somsen, C. ^{[4
]}

Ozcan, H. ^{[5
]}

Karaman, I. ^{[5
]}

Weidner, A. ^{[1
]}

Rafaja, D. ^{[3
]}

Biermann, H. ^{[1
]}

Niendorf, T. ^{[1
,2
]}

机构：

[1] Tech Univ Bergakad Freiberg, Inst Werkstofftech Mat Engn, D-09599 Freiberg, Germany

[2] Univ Kassel, Inst Werkstofftech Mat Engn, D-34125 Kassel, Germany

[3] Tech Univ Bergakad Freiberg, Inst Mat Sci, Inst Werkstoffwissensch, D-09599 Freiberg, Germany

[4] Ruhr Univ Bochum, Inst Werkstoffe, D-44801 Bochum, Germany

[5] Texas A&M Univ, Dept Mat Sci & Engn, College Stn, TX 77843 USA

来源：

SCRIPTA MATERIALIA | 2016年 / 114卷

基金：

美国国家科学基金会;

关键词：

Martensitic phase transformation; Cyclic degradation; Superelasticity; In situ testing; Irreversibility; SUPERELASTIC RESPONSE; SIZE; PSEUDOELASTICITY; TEXTURE; FATIGUE;

D O I：

10.1016/j.scriptamat.2015.12.007

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

In the present study the cyclic deformation behavior within differently oriented grains in Fe-34.8Mn-13.5Al-7.4Ni (at.%) shape memory polycrystals featuring a bamboo-like structure was investigated. In cyclic tensile tests up to 50 cycles, the degree of degradation in pseudoelasticity was evaluated and contributing elementary mechanisms are discussed. The results reveal rapid cyclic degradation in the bamboo-like samples. The unexpected stabilization of parent phase in reverse transformed areas and the proceeding activation of new martensite variants in subsequent cycles were found to be the prevailing degradation mechanisms. Dislocation activity is found to be the most detrimental factor. (C) 2015 Elsevier Ltd. All rights reserved.

引用

页码：156 / 160

页数：5

共 24 条

[1] The shape-memory effect and superelasticity in single-crystal ferromagnetic alloy FeNiCoAlTi [J].