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首页> 外文期刊>Materials Science and Engineering >Crystallography and morphology of various interfaces in Ti-Ni, Ti-Pd and Ni-Mn-Ga shape memory alloys
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Crystallography and morphology of various interfaces in Ti-Ni, Ti-Pd and Ni-Mn-Ga shape memory alloys

机译：Ti-Ni，Ti-Pd和Ni-Mn-Ga形状记忆合金中各种界面的晶体学和形态

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摘要

Crystallography and morphology of various interfaces in Ti-Ni, Ti-Pd and Ni-Mn-Ga shape memory alloys are investigated by transmission electron microscopy. Neither ledge nor step structures are recognized at the irrational interface of the <011>_(B19') type II twin in Ti-Ni martensite and the <121>_(B19) type II twin in Ti-Pd martensite in the two dimensional lattice image from the η1 direction. The combination of plate variants of the 10 and the 14 M Ni-Mn-Ga martensites is subsequently discussed. There are four plate variants commonly designated as A, B, C and D, and three fundamental plate combinations can be identified in a given plate group, namely A: B (C: D) of type II, A: C (B: D) of type I and A: D (B: C) of compound twins in both the martensites. An interesting phenomenon is the migration of A: D boundary in the 10 M martensite during the observation. Finally, we present the atomic structures of {114}_(B2) Σ9 boundary in the B2 parent phase of Ti-Ni. The influence of heat treatment atmosphere on the boundary structures is also discussed.
机译：通过透射电子显微镜研究了Ti-Ni，Ti-Pd和Ni-Mn-Ga形状记忆合金中各种界面的晶体学和形态。 Ti-Ni马氏体中的<011> _（B19'）II型孪晶和二维Ti-Pd马氏体中的<121> _（B19）II型孪晶在非理性界面上都没有识别出凸耳和台阶结构η1方向的点阵图像。随后讨论了10 M和14 M Ni-Mn-Ga马氏体的板变体的组合。通常有四个板变种分别表示为A，B，C和D，并且可以在给定板组中识别出三种基本板组合，即II型的A：B（C：D），A：C（B：D I型和A：两种马氏体中的复合孪晶都为D（B：C）。一个有趣的现象是观察过程中A：D边界在10 M马氏体中的迁移。最后，我们给出了Ti-Ni B2母相中{114} _（B2）Σ9边界的原子结构。还讨论了热处理气氛对边界结构的影响。

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  • 来源
    《Materials Science and Engineering》 |2008年第3期|18-27|共10页
  • 作者

    M. Nishida; T. Hara; M. Matsuda; S. Ii;

  • 作者单位

    Department of Materials Science and Engineering, Kumamoto University, Kumamoto 860-8555, Japan;

    National Institute for Materials Science, Tsukuba, Ibaraki 305-0047, Japan;

    Department of Materials Science and Engineering, Kumamoto University, Kumamoto 860-8555, Japan;

    Department of Mechanical Engineering, Sojyo University, Kumamoto 860-0082, Japan;

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  • 正文语种 eng
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  • 关键词

    irrational boundary; variant plate combination; grain boundary;

    机译：非理性边界变体板组合;晶界;

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