Stress-induced martensitic transformations in a Cu–Al–Ni shape memory alloy studied by in situ transmission electron microscopy
Stress-induced martensitic transformations in a Cu–Al–Ni shape memory alloy studied by in situ transmission electron microscopy
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DOI：
10.1016/j.msea.2006.12.208
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发表时间：
2008-05
期刊：
影响因子：
6.4
通讯作者：
N. Zárubová;J. Gemperlová;V. Gärtnerová;A. Gemperle
中科院分区：
文献类型：
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作者：
N. Zárubová;J. Gemperlová;V. Gärtnerová;A. Gemperle
对一种Cu-Al-Ni形状记忆合金的原位应变薄片进行了透射电子显微镜观察和分析。实验是在室温下进行的。本文描述了两种应力诱导相变过程。(I)[式：见正文](2H)马氏体的两个变体之间的转变。两个变异体在低应力下共存。随着应力的增加，一个变量被另一个变量替换，并在卸载过程中再次出现。(Ii)β1(D03)奥氏体与[式：见正文](18R)马氏体之间的转变。[公式：见文本]针在压力下的成核和行为被跟踪。
Structural observations by transmission electron microscopy were performed and analyzed on in situ strained foils of a Cu–Al–Ni shape memory alloy. The experiments were carried out at room temperature. Two stress-induced transformation processes are described in this paper. (i) Transition between two variants of [Formula: see text] (2H) martensite. Both variants coexisted at low stresses. With increasing stress, one variant was replaced by the other one and appeared again during unloading. (ii) Transformation between β1(D03) austenite and [Formula: see text] (18R) martensite. Nucleation and behaviour of the [Formula: see text] needles under stress were followed.