Effect of rare earth Y addition on two-phase Ni53Mn22Co6Ga19 high-temperature shape memory alloy

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	Effect of rare earth Y addition on two-phase Ni53Mn22Co6Ga19 high-temperature shape memory alloy
	Jiao, Xinquan ; Yang, Shuiyuan ; Su, Yu ; Yang SY(杨水源)
刊名	http://dx.doi.org/10.3139/146.110993
	2014
关键词	MN-GA ALLOYS MARTENSITIC-TRANSFORMATION MECHANICAL-PROPERTIES PHASE-TRANSFORMATION MICROSTRUCTURE NI54MN25GA21 STABILITY
英文摘要	National Natural Science Foundation of China [51201145, 51031003]; Ministry of Science and Technology of China [2009DFA52170]; The microstructures, martensitic transformation, mechanical and shape memory properties of (Ni53Mn22Co6Ga19)(100-x)Y-x (x = 0, 0.1, 0.3) high-temperature shape memory alloys were investigated. It was found that small Y addition results in the refinement of grain size and the increase of gamma phase volume fraction. These changes can effectively improve the tensile ductility and fracture strength of two-phase Ni53Mn22Co6Ga19 alloy, up to the maximum values of 10.1 % and 592 MPa respectively at x = 0.1. However, it is proposed that Y(Ni,Mn)(4)Ga precipitate forms in the alloys with the addition of Y, and its amount increases with further increasing Y addition. The growth of the Y(Ni,Mn)(4)Ga precipitate results in a decrease in the tensile ductility at x = 0.3. Results further show that shape memory properties of the studied alloys are closely related to the refinement of grain size and the alloy yield strength. While adding 0.1 at.% of Y, the shape memory effect and recovery rate decrease, resulting from the refinement of grain size, compared to those of two-phase Ni53Mn22Co6Ga19 alloy. Subsequently they increase with further increasing Y content to 0.3 at.% due to the decrease in the alloy yield strength.
语种	英语
出版者	CARL HANSER VERLAG
内容类型	期刊论文
源URL	[http://dspace.xmu.edu.cn/handle/2288/87378]
专题	材料学院－已发表论文
推荐引用方式 GB/T 7714	Jiao, Xinquan,Yang, Shuiyuan,Su, Yu,et al. Effect of rare earth Y addition on two-phase Ni53Mn22Co6Ga19 high-temperature shape memory alloy[J]. http://dx.doi.org/10.3139/146.110993,2014.
APA	Jiao, Xinquan,Yang, Shuiyuan,Su, Yu,&杨水源.(2014).Effect of rare earth Y addition on two-phase Ni53Mn22Co6Ga19 high-temperature shape memory alloy.http://dx.doi.org/10.3139/146.110993.
MLA	Jiao, Xinquan,et al."Effect of rare earth Y addition on two-phase Ni53Mn22Co6Ga19 high-temperature shape memory alloy".http://dx.doi.org/10.3139/146.110993 (2014).