欧阳晟,杨延清

• 1:西北工业大学材料学院

摘要(Abstract)：

采用透射电镜观察了Ni-Mn-Ga形状记忆合金非调制马氏体变体对A-B的晶体学特点。结果表明,马氏体变体为微米级的板条,该板条由两种粗、细不同的纳米级的片层组成,粗、细片层呈{1 1 2}复合型孪晶关系。两变体之间任意一对片层的取向关系随着细片层所占体积分数(λ)的改变而改变。λ较大时,变体之间片层对(粗-粗、粗-细、细-细片层对)都不是(1 12)孪晶,λ接近于零时,细片层消失,粗-粗片层对为(1 12)孪晶。随着λ由较大值减小至零,A-B界面由波浪状的弯曲界面转变成平直的共格孪晶界。

关键词(KeyWords)： Ni-Mn-Ga合金;纳米孪晶;A-B变体对;晶体学;体积分数

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(51071125,51271147,51201134,51201135)

作者(Author): 欧阳晟,杨延清

DOI: 10.13289/j.issn.1009-6264.2017-0171

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