Microstructure and shape-memory characteristics of Ni56Mn25-xCoxGa19 (x=4, 8) high-temperature shape-memory alloys

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	Microstructure and shape-memory characteristics of Ni56Mn25-xCoxGa19 (x=4, 8) high-temperature shape-memory alloys
	Yang, S. Y. ; Ma, Y. Q. ; Jiang, H. F. ; Liu, X. J. ; Liu XJ(刘兴军)
刊名	http://dx.doi.org/10.1016/j.intermet.2010.08.009
	2011-02
关键词	MN-GA ALLOYS FE TRANSFORMATION NI54MN25GA21 DUCTILITY
英文摘要	Natural Science Foundation of China [50771086]; Program for New Century Excellent Talents in University [NCET-09-0676]; Program for New Century Excellent Talents in Fujian Province University (NCETFJ); Fujian Provincial Department of Science and Technolog; NiMnCoGa alloys were studied as candidate of high-temperature shape-memory alloys with Mn substituted by Co. The results show that the hot workability and room-temperature ductility of NiMnGa alloys can be greatly improved by forming ductile gamma phase through Co addition. When the amount of gamma phase is about 19%, the tensile stress and strain are 491 MPa and 8.2%, respectively. When the amount of gamma phase increased to about 43%, the tensile stress and strain are 729.3 MPa and 14.1%, respectively. The reversible strain due to shape-memory effect is 2.1% under a prestrain of 5.3% for x = 4, and the shape-memory ability almost disappears for x = 8 due to large amount of gamma phase, which seriously hampers the reorientation of martensitic variants and/or detwinning. (C) 2010 Elsevier Ltd. All rights reserved.
语种	英语
内容类型	期刊论文
源URL	[http://dspace.xmu.edu.cn/handle/2288/59220]
专题	材料学院－已发表论文
推荐引用方式 GB/T 7714	Yang, S. Y.,Ma, Y. Q.,Jiang, H. F.,et al. Microstructure and shape-memory characteristics of Ni56Mn25-xCoxGa19 (x=4, 8) high-temperature shape-memory alloys[J]. http://dx.doi.org/10.1016/j.intermet.2010.08.009,2011.
APA	Yang, S. Y.,Ma, Y. Q.,Jiang, H. F.,Liu, X. J.,&刘兴军.(2011).Microstructure and shape-memory characteristics of Ni56Mn25-xCoxGa19 (x=4, 8) high-temperature shape-memory alloys.http://dx.doi.org/10.1016/j.intermet.2010.08.009.
MLA	Yang, S. Y.,et al."Microstructure and shape-memory characteristics of Ni56Mn25-xCoxGa19 (x=4, 8) high-temperature shape-memory alloys".http://dx.doi.org/10.1016/j.intermet.2010.08.009 (2011).