Microdefects and electron densities in NiTi shape memory alloys studied by positron annihilation

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	Microdefects and electron densities in NiTi shape memory alloys studied by positron annihilation
	Hu Yi-feng ; Deng Wen ; Hao Wen-bo ; Yue Li ; Huang Le ; Huang Yu-yang ; Xiong Liang-yue
刊名	TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
	2006-12-01
卷号	16 期号:6 页码:1259-1262
关键词	NiTi alloy microdefect electron density martensite transformation
ISSN号	1003-6326
通讯作者	Deng Wen(wdeng@gxu.edu.cn)
英文摘要	The microdefects and free electron densities in B2, R and B19' phases of Ni50.78Ti49.22 alloy were studied by positron lifetime measurements. Comparing the lifetime parameters of the Ni50.78Ti49.22 alloy measured at 295 K and 225 K, it is found that the free electron density of the R phase is lower than that of the B2 phase; the open volume of the defects of the R phase is larger, while the concentration of these defects is lower than that of the B2 phase. The Ni50.78Ti49.22 alloy exhibits B19' phase at 115 K. In comparison with the R phase, the free electron density of the B19' phase increases, the open volume of the defects of the B19' phase reduces, and the concentration of these defects increases. The microdefects and the free electron density play an important role during the multi-step transformations (B2 -> R -> B19' phase transformations) in Ni50.78Ti49.22 alloy with the decrease of temperature.
WOS研究方向	Metallurgy & Metallurgical Engineering
语种	英语
出版者	ALLERTON PRESS INC
WOS记录号	WOS:000243345900003
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/88818]
专题	金属研究所_中国科学院金属研究所
通讯作者	Deng Wen
作者单位	1.Jiangsu Teachers Univ Technol, Dept Basic Sci, Changzhou 213001, Peoples R China 2.Guangxi Univ, Coll Phys Sci & Technol, Nanning 530004, Peoples R China 3.Chinese Acad Sci, Met Res Inst, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Hu Yi-feng,Deng Wen,Hao Wen-bo,et al. Microdefects and electron densities in NiTi shape memory alloys studied by positron annihilation[J]. TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA,2006,16(6):1259-1262.
APA	Hu Yi-feng.,Deng Wen.,Hao Wen-bo.,Yue Li.,Huang Le.,...&Xiong Liang-yue.(2006).Microdefects and electron densities in NiTi shape memory alloys studied by positron annihilation.TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA,16(6),1259-1262.
MLA	Hu Yi-feng,et al."Microdefects and electron densities in NiTi shape memory alloys studied by positron annihilation".TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA 16.6(2006):1259-1262.