Effect of small gamma-precipitates on the two-way shape memory effect in Cu-Zn-Al alloys

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	Effect of small gamma-precipitates on the two-way shape memory effect in Cu-Zn-Al alloys
	X. M. Zhang; M. Liu; J. Fernandez; J. M. Guilemany
	2000
发表期刊	Materials & Design
ISSN	0261-3069
卷号	21 期号:6 页码:557-559
摘要	The gamma-precipitates in Cu-Zn-Al alloys, trained by the stabilization of the stress induced martensite (SSIM) method, have been studied. After the SSIM treatment, it was found that small gamma-precipitates in the beta-austenite are ellipsoidal, with a large strain field oriented in the same direction; while in the martensite the gamma-precipitates changed their shape from ellipsoid to spheroid, and relaxed their strain fields. In order to check whether the strain field of the gamma-precipitates is capable of producing a thermoelastic martensitic transformation, an in-situ observation, by heating a sample holder in TEM, was performed. It was found that during heating over a temperature A(s), the gamma-precipitates with a spherical shape in the martensite recovered their strain field and elliptical shape. During cooling, the strain field of the gamma-precipitates disappeared again. It was proposed that the strain field of the gamma-precipitates, trained by the SSIM method, plays an important part in the thermoelastic martensitic transformation, and presents two-way shape memory effects. (C) 2000 Elsevier Science Ltd. All rights reserved.
部门归属	univ barcelona, barcelona 08028, spain. cas, inst met res, atom imaging solids lab, shenyang 110015, peoples r china.
关键词	Twsme (Two Way Shape Memory Effect) Precipitation Strain Fields Cu-zn-al Alloys Stress-induced Martensite Oriented Growth Transformation Behavior
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WOS记录号	WOS:000088844400014
引用统计	被引频次：15[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/321006/37256
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	X. M. Zhang,M. Liu,J. Fernandez,et al. Effect of small gamma-precipitates on the two-way shape memory effect in Cu-Zn-Al alloys[J]. Materials & Design,2000,21(6):557-559.
APA	X. M. Zhang,M. Liu,J. Fernandez,&J. M. Guilemany.(2000).Effect of small gamma-precipitates on the two-way shape memory effect in Cu-Zn-Al alloys.Materials & Design,21(6),557-559.
MLA	X. M. Zhang,et al."Effect of small gamma-precipitates on the two-way shape memory effect in Cu-Zn-Al alloys".Materials & Design 21.6(2000):557-559.