Effect of pre-deformation on martensitic transformation behavior and the microstructure of a Ni-Mn-Ga alloy

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	Effect of pre-deformation on martensitic transformation behavior and the microstructure of a Ni-Mn-Ga alloy
	Gao, ZY ; Chen, F ; Cai, W ; Zhao, LC ; Wu, GH ; Shen, BG ; Zhan, WS
刊名	MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
	2006
卷号	438 页码:974
关键词	SHAPE-MEMORY ALLOY
ISSN号	0921-5093
通讯作者	Gao, ZY: Harbin Inst Technol, Sch Mat Sci & Engn, Harbin 150001, Peoples R China.
中文摘要	The influence of pre-deformation on the martensitic transformation behavior and its microstructure has been put forward in a Ni55Mn20Ga25 (at.%) ferromagnetic shape memory alloy. It is found that the reverse martensitic transformation temperatures (A(s) and A(f)) increase linearly with increasing amount of deformation, while the martensitic transformation temperatures (M-s and M-f) are not changed even when the deformation is up to 6%. However, the effect of the pre-deformation on the reverse martensitic transformation disappears in the following heating process. Transmission electron microscopy shows well-accommodated martensite variants in the undeformed specimen and interfacial boundaries are straight and well-defined. After deformation, the reorientation of martensite variants occurs at the expense of the unfavorable martensite variants, and the interfacial boundary changes from a sharp and straight morphology to a curved and irregular one. Meanwhile, some lattice defects are formed inside the variants even in slightly compressed samples. With increasing deformation, more lattice defects are generated inside the variants as well as in the interfacial boundaries between variants. Based on the analysis of the experimental results, the micromechanism of the effect of pre-deformation on martensific transformation behavior has been clarified. (c) 2006 Elsevier B.V. All rights reserved.
收录类别	SCI
语种	英语
公开日期	2013-09-17
内容类型	期刊论文
源URL	[http://ir.iphy.ac.cn/handle/311004/36528]
专题	物理研究所_物理所公开发表论文_物理所公开发表论文_期刊论文
推荐引用方式 GB/T 7714	Gao, ZY,Chen, F,Cai, W,et al. Effect of pre-deformation on martensitic transformation behavior and the microstructure of a Ni-Mn-Ga alloy[J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,2006,438:974.
APA	Gao, ZY.,Chen, F.,Cai, W.,Zhao, LC.,Wu, GH.,...&Zhan, WS.(2006).Effect of pre-deformation on martensitic transformation behavior and the microstructure of a Ni-Mn-Ga alloy.MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,438,974.
MLA	Gao, ZY,et al."Effect of pre-deformation on martensitic transformation behavior and the microstructure of a Ni-Mn-Ga alloy".MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 438(2006):974.