Self-accommodation in Ti-Nb shape memory alloys
Self-accommodation in Ti-Nb shape memory alloys
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DOI：
10.1016/j.actamat.2009.04.051
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发表时间：
2009-08-01
期刊：
影响因子：
9.4
通讯作者：
Miyazaki, S.
中科院分区：
文献类型：
--
作者：
Chai, Y. W.;Kim, H. Y.;Miyazaki, S.
Nb含量为20 ~ 24 at.%的Ti-Nb形状记忆合金中α "马氏体的自适应形态被查由三个α "变体组成的空心和实心三角形形态被认为是α"自适应形态。alpha "变体通过{1（1）over bar 1}（alpha“）上的孪生相互关联。由两个α "变体组成的V形形态与由三个α"变体组成的实心三角形形态相结合，被发现是另一种类型的自适应形态。来自V形形态的α "变体通过在{111}上孪生而相关（α“），而来自实心三角形形态的α"变体通过在条1上{1（1）}上孪生而彼此相关（α”）。发现晶体学上等价的{1（1）over bar 1}（α“）孪晶位错对与符号相反的台阶导致孪晶台阶和台阶的总体取向平行于{1（1）over bar 1}（α”）孪晶界面。(C)2009 Acta Materialia Inc.由爱思唯尔有限公司出版。保留所有权利。
Self-accommodation morphology of the alpha '' martensites in Ti-Nb shape memory alloys with Nb content ranging from 20 to 24 at.% was investigated. Hollow and solid triangular morphologies consisting of three alpha '' variants were found to be the alpha '' self-accommodation morphologies. The alpha '' variants are related to each other by twinning on {1 (1) over bar1}(alpha ''). A V-shaped morphology consisting of two alpha '' variants coupled with a solid triangular morphology consisting of three alpha '' variants was found to be another type of self-accommodation morphology. The alpha '' variants from the V-shaped morphology are related by twinning on {111}(alpha ''), whereas the alpha '' variants from the solid triangular morphology are related to each other by twinning on {1 (1) over bar1}(alpha ''). Pairs of crystallographically equivalent {1 (1) over bar1}(alpha '') twinning dislocations with steps of opposite signs were found to cause the overall orientation of the twinning terraces and steps to be parallel to the {1 (1) over bar1}(alpha '') twinning interface. (C) 2009 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.