Study of gamma precipitates induced by the stabilized stress-induced martensite (SSIM) training method in Cu-Zn-Al alloys

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	Study of gamma precipitates induced by the stabilized stress-induced martensite (SSIM) training method in Cu-Zn-Al alloys
	X. M. Zhang ; J. M. Guilemany ; J. Fernandez ; M. Liu ; L. Liu
刊名	Intermetallics
	2000
卷号	8 期号:7 页码:703-707
关键词	intermetallics miscellaneous phase transformations shape-memory effects shape-memory alloys oriented growth transformation behavior
ISSN号	0966-9795
中文摘要	It is known that the presence of small gamma precipitates in Cu-Zn-Al alloys favours the appearance of the two-way shape memory effects (TWSME), especially via the training process of the stabilization of stress-induced martensite (SSIM). In order to investigate the effect of the gamma precipitates trained by the SSIM method, the morphology and strain field of the gamma phase in Cu-Zn-Al alloys have been studied by means of transmission electron microscopy (TEM) and high-resolution electron microscopy (HREM). It was found that the small gamma precipitates (about 10-20 nm) are ellipsoidal, with a large strain field oriented in one direction in the beta austenite grains, regardless of the grain orientation, and that the gamma precipitates in the martensite relaxed their strain fields and changed their shape from ellipsoidal to spherical. HREM images revealed perfect coherency between the gamma precipitates and the beta matrix, and the scale of the strain field was estimated to be in the range of 80-150 nm. It was suggested that the oriented ellipsoidal gamma precipitates are stress-induced during SSIM treatment in the austenite and the available elastic stress field causes the thermoelastic martensitic transformation. The effect of the fine y precipitates on TWSME was also discussed. (C) 2000 Elsevier Science Ltd. All rights reserved.
原文出处	://WOS:000087568100001
公开日期	2012-04-14
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/37254]
专题	金属研究所_中国科学院金属研究所
推荐引用方式 GB/T 7714	X. M. Zhang,J. M. Guilemany,J. Fernandez,et al. Study of gamma precipitates induced by the stabilized stress-induced martensite (SSIM) training method in Cu-Zn-Al alloys[J]. Intermetallics,2000,8(7):703-707.
APA	X. M. Zhang,J. M. Guilemany,J. Fernandez,M. Liu,&L. Liu.(2000).Study of gamma precipitates induced by the stabilized stress-induced martensite (SSIM) training method in Cu-Zn-Al alloys.Intermetallics,8(7),703-707.
MLA	X. M. Zhang,et al."Study of gamma precipitates induced by the stabilized stress-induced martensite (SSIM) training method in Cu-Zn-Al alloys".Intermetallics 8.7(2000):703-707.