Mechanical and functional properties of two-phase Ni53Mn 22Co6Ga19 high-temperature shape memory alloy with the addition of Dy

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	Mechanical and functional properties of two-phase Ni53Mn 22Co6Ga19 high-temperature shape memory alloy with the addition of Dy
	Yang, S.Y. ; Wang, C.P. ; Liu, X.J. ; Wang CP(王翠萍) ; Liu XJ(刘兴军)
刊名	http://dx.doi.org/10.1088/0964-1726/22/3/035008
	2013
关键词	Gallium Gallium alloys Grain size and shape Manganese Martensitic transformations Nickel Shape memory effect
英文摘要	The effects of Dy addition on microstructure, martensitic transformation, mechanical and shape memory properties of the two-phase Ni53Mn 22Co6Ga19 high-temperature shape memory alloy were investigated. It is found that a small Dy addition results in the refinement of grain size, which can effectively improve the tensile ductility and strength of the two-phase Ni53Mn22Co 6Ga19 alloy. However, a Dy(Ni,Mn)4Ga precipitate forms in the alloys with the Dy addition, and its amount increases with an increase in the Dy addition. This change causes the ductility of the alloys to decrease when the Dy addition is further increased to 0.3 at.%. The results further show that the changes in the martensitic transformation temperature of the studied alloys can be attributed to the combined effects of the tetragonality (c/a) and electron concentration (e/a) of martensite. Additionally, the shape memory effects of the alloys are closely related to the refinement of grain size and the alloy strength. In this study, the (Ni 53Mn22Co6Ga19)99.8Dy 0.2 alloy exhibits a variety of good properties, including a high martensitic transformation starting temperature of 385.7 °C, a tensile ductility of 10.3% and a shape memory effect of 2.8%. ? 2013 IOP Publishing Ltd.
语种	英语
出版者	Institute of Physics Publishing
内容类型	期刊论文
源URL	[http://dspace.xmu.edu.cn/handle/2288/87292]
专题	材料学院－已发表论文
推荐引用方式 GB/T 7714	Yang, S.Y.,Wang, C.P.,Liu, X.J.,et al. Mechanical and functional properties of two-phase Ni53Mn 22Co6Ga19 high-temperature shape memory alloy with the addition of Dy[J]. http://dx.doi.org/10.1088/0964-1726/22/3/035008,2013.
APA	Yang, S.Y.,Wang, C.P.,Liu, X.J.,王翠萍,&刘兴军.(2013).Mechanical and functional properties of two-phase Ni53Mn 22Co6Ga19 high-temperature shape memory alloy with the addition of Dy.http://dx.doi.org/10.1088/0964-1726/22/3/035008.
MLA	Yang, S.Y.,et al."Mechanical and functional properties of two-phase Ni53Mn 22Co6Ga19 high-temperature shape memory alloy with the addition of Dy".http://dx.doi.org/10.1088/0964-1726/22/3/035008 (2013).