Calorimetric study of multiple-step transformation in TiNi shape memory alloy with partial transformation cycle

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	Calorimetric study of multiple-step transformation in TiNi shape memory alloy with partial transformation cycle
	Z. G. Wang; X. T. Zu; X. D. Feng; H. Q. Mo; J. M. Zhou
	2004
发表期刊	Materials Letters
ISSN	0167-577X
卷号	58 期号:25 页码:3141-3144
摘要	Single-step transformation was observed for Ti-50.6 at.%Ni shape memory alloy (SMA) solution annealed at 800 degreesC for 20 min and quenched to 0 degreesC. However, multiple-step transformation (MST) occurred after further aging at 380-500 degreesC for 1 h. Aging at 380 degreesC resulted in three distinct DSC peaks upon cooling and two peaks upon heating. Aging at 450 degreesC resulted in three distinct DSC peaks upon cooling and one peak upon heating. There were two peaks that emerge upon cooling and one peak upon heating for the samples aged at 500 degreesC. The multiple-step transformation was studied by differential scanning calorimetry (DSC) with partial transformation cycle. The multiple-step transformation was explained by the heterogeneous microstructures. The matrix in the precipitate Ti3Ni4 region near the grain boundary transformed from parent phase (B2) to R phase and further to martensite (B19') which contribute to the first and second peaks upon cooling, and B19' --> R --> B2 transformation happens upon heating. Whereas the matrix in the precipitate free grain interiors B2 transformed into martensite directly which contribute to the third peak upon cooling. (C) 2004 Published by Elsevier B.V.
部门归属	univ elect sci & technol china, dept appl phys, chengdu 610054, peoples r china. chinese acad sci, int ctr mat phys, shenyang 110015, peoples r china. sichuan univ, dept phys, chengdu 610064, peoples r china.;zu, xt (reprint author), univ elect sci & technol china, dept appl phys, chengdu 610054, peoples r china;zuxt@sohu.com
关键词	Tini Shape Memory Alloy Aging Differential Scanning Calorimetry (Dsc) Martensitic Phase Transformation Partial Transformation Cycle Binary Niti-alloys Martensitic-transformation Electron-microscopy Phase Microstructure
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WOS记录号	WOS:000223822100012
引用统计	被引频次：16[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/35598
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	Z. G. Wang,X. T. Zu,X. D. Feng,et al. Calorimetric study of multiple-step transformation in TiNi shape memory alloy with partial transformation cycle[J]. Materials Letters,2004,58(25):3141-3144.
APA	Z. G. Wang,X. T. Zu,X. D. Feng,H. Q. Mo,&J. M. Zhou.(2004).Calorimetric study of multiple-step transformation in TiNi shape memory alloy with partial transformation cycle.Materials Letters,58(25),3141-3144.
MLA	Z. G. Wang,et al."Calorimetric study of multiple-step transformation in TiNi shape memory alloy with partial transformation cycle".Materials Letters 58.25(2004):3141-3144.