The reorientation of the 2H martensite phase in Cu-Al-Mn shape memory single crystal alloy

S. Ignacova; T. Cernoch; V. Novak; P. Sittner

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The reorientation of the 2H martensite phase in Cu-Al-Mn shape memory single crystal alloy

机译：Cu-Al-Mn形状记忆单晶合金中2H马氏体相的重新取向

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Regarding the deformation processes in shape memory alloys, large amount of experimental data on stress-induced martensitic transformations exist in the literature. Much less evidence is available on the mechanics of the twinning processes in the martensitic phases (particularly the level and orientation dependence of twinning stresses), although they provide recoverable strains of the same order. In this work, twinning deformation processes in the 2H martensite phase in Cu-Al-Mn shape memory alloy single crystals were investigated. It was found that out of the three possible twinning modes (compound, type-I and type-II), the type-II twinning mode prevails for most of the load axis orientations in compression. The reason is the relatively large twinning stress for compound twinning in Cu-Al-Mn comparable to that for type-II twinning.

机译：关于形状记忆合金的变形过程，文献中存在大量有关应力诱发马氏体相变的实验数据。尽管在马氏体相中孪生过程的力学性质（尤其是孪生应力的水平和方向依赖性）方面，可利用的证据很少，尽管它们提供了相同数量级的可恢复应变。在这项工作中，研究了Cu-Al-Mn形状记忆合金单晶在2H马氏体相中的孪生变形过程。已经发现，在三种可能的孪生模式（复合，I型和II型）中，II型孪生模式在压缩中的大多数载荷轴方向上均占优势。原因是与II型孪晶相比，Cu-Al-Mn中化合物孪晶的孪晶应力相对较大。

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来源
《Materials Science and Engineering》 |2008年第3期|526-531|共6页
作者
S. Ignacova; T. Cernoch; V. Novak; P. Sittner;
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作者单位

Institute of Physics AS CR, v.v.i, Na Slovance 2, 182 21 Prague 8, Czech Republic Faculty of Nuclear Sciences and Physical Engineering CTU, Bfehova 7, 11519 Prague 1, Czech Republic;

Institute of Physics AS CR, v.v.i, Na Slovance 2, 182 21 Prague 8, Czech Republic Faculty of Nuclear Sciences and Physical Engineering CTU, Bfehova 7, 11519 Prague 1, Czech Republic;

Institute of Physics AS CR, v.v.i, Na Slovance 2, 182 21 Prague 8, Czech Republic;

Institute of Physics AS CR, v.v.i, Na Slovance 2, 182 21 Prague 8, Czech Republic;

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正文语种 eng
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关键词
Cu-Al-Mn; single crystal; compression; twinning; martensite;

机译：铜铝锰;单晶压缩;孪生马氏体;

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The reorientation of the 2H martensite phase in Cu-Al-Mn shape memory single crystal alloy

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