Crystallography and morphology of twins in equiatomic TiPt martensite
Crystallography and morphology of twins in equiatomic TiPt martensite
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DOI：
10.1179/174328408x302549
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发表时间：
2008-08
影响因子：
1.8
通讯作者：
M. Nishida;M. Matsuda;Y. Yasumoto;S. Yano;Y. Yamabe-Mitarai;T. Hara
中科院分区：
文献类型：
--
作者：
M. Nishida;M. Matsuda;Y. Yasumoto;S. Yano;Y. Yamabe-Mitarai;T. Hara
用透射电镜观察了Ti-Pt形状记忆合金B19（2 H）马氏体中的孪晶。有三种明显的孪晶模式，即{111} 2 H Ⅰ型、2 H Ⅱ型和{101} 2 H复合孪晶。除2 H马氏体外，还观察到各种长周期堆垛结构，如21堆垛和无公度调制马氏体。常观察到两种源于母相同一密排面的马氏体组织共存于同一区域，即“二合一”形态。的“二合一”形态的晶体学方面进行了讨论。
Twins in the B19 (2H) martensite in Ti–Pt shape memory alloy have been investigated by transmission electron microscopy. There are three twinning modes evident, i.e. {111}2H Type I, 2H Type II and {101}2H compound twins. In addition to the 2H martensite, various long period stacking structures are observed such as 21¯12¯ stacking and incommensurate like modulated martensites. It is frequently observed that two martensite structures derived from the identical closed packed plane of the parent phase coexist in the same area, namely, ‘two-in-one’ morphology. The crystallographic aspects of the ‘two-in-one’ morphology are also discussed.