The effect of cyclic tensile loading on the stress-induced transformation mechanism in superelastic NiTi alloys: an in-situ X-ray diffraction study

被引：43
作者：
Polatidis, E. [1 ,2 ]
Zotov, N. [1 ,2 ]
Bischoff, E. [1 ,2 ]
Mittemeijer, E. J. [1 ,2 ,3 ]
机构：
[1] Max Planck Inst Intelligent Syst, D-70569 Stuttgart, Germany
[2] Max Planck Inst Met Res, D-70569 Stuttgart, Germany
[3] Univ Stuttgart, Inst Mat Sci, D-70569 Stuttgart, Germany
来源：
SCRIPTA MATERIALIA | 2015年 / 100卷
关键词：
NiTi; Shape memory alloys (SMAs); Martensitic phase transformation; X-ray diffraction (XRD); Fatigue; SHAPE-MEMORY ALLOY; LUDERS-LIKE DEFORMATION; INDUCED MARTENSITIC-TRANSFORMATION; MEDICAL APPLICATIONS; BEHAVIOR; STRAIN; PSEUDOELASTICITY; FATIGUE;
D O I：
10.1016/j.scriptamat.2014.12.013
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
The effect of cyclic tensile loading on the transformation behavior of superelastic NiTi was investigated by in-situ synchrotron X-ray diffraction (XRD) and transmission electron microscopy (TEM). It was quantitatively demonstrated that cyclic tensile loading alters the reversible austenite martensite transformation character from localized (transformation fronts propagating) to uniform. TEM and XRD showed that the change of transformation behavior is not related to the presence of retained martensite or a change in texture upon tensile load-cycling but to the introduction of dislocations. (C) 2014 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：59 / 62
页数：4
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