High-resolution transmission electron microscope (HRTEM) study of the transformation interface and substructure in NiTiHf40 melt-spun ribbons

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	High-resolution transmission electron microscope (HRTEM) study of the transformation interface and substructure in NiTiHf40 melt-spun ribbons
	M. Liu ; X. M. Zhang ; Y. Y. Li ; J. Z. Chen ; M. J. Tu
刊名	Journal of Alloys and Compounds
	2002
卷号	334 页码:147-153
关键词	transition metal alloys amorphous materials TEM phase transition shape-memory alloy hf b19' martensite
ISSN号	0925-8388
中文摘要	The fine structures of self-accommodation spear-like martensite variant groups and the interface between the martensite region and the amorphous phase region in NiTi-Hf-40 melt-spun ribbons were studied by using high-resolution transmission electron microscopy (HRTEM). In the self-accommodation lath plate martensite group, the variants prefer to form orthogonal morphology of spear-like martensite on both sides of melt-spun ribbons. Some variant pairs were of the (011)(B19). Type I twin related with straight and coherent interface while the interface between other variants is curved and incoherent. The main substructure in variants of the group was not the (001)(B19). compound twin but the (011)(B19). Type I microtwin and (011) stacking faults. The interface between the amorphous phase and the martensite region showed high energy and nonequilibrium configuration. Some area in the interface is straight but not smooth and exhibited an irregular configuration and some area in the interface has an obvious zigzag configuration. Energy-dispersive spectroscopy (EDX) analysis of the composition in NiTi-Hf-40 ribbon showed that the Ni and Ti content were different in the martensite region and in the amorphous phase. The amorphous phase and the martensite coexisted in NiTi-Hf ribbons when the cooling rate was high enough. The higher hardness and brittleness of Hf-40 compared to those of lower Hf content NiTi-Hf alloys were due to the not retained austenite, the very small variant pair and the coexisting amorphous phase. (C) 2002 Elsevier Science BY All rights reserved.
原文出处	://WOS:000173810700023
公开日期	2012-04-14
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/36350]
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	M. Liu,X. M. Zhang,Y. Y. Li,et al. High-resolution transmission electron microscope (HRTEM) study of the transformation interface and substructure in NiTiHf40 melt-spun ribbons[J]. Journal of Alloys and Compounds,2002,334:147-153.
APA	M. Liu,X. M. Zhang,Y. Y. Li,J. Z. Chen,&M. J. Tu.(2002).High-resolution transmission electron microscope (HRTEM) study of the transformation interface and substructure in NiTiHf40 melt-spun ribbons.Journal of Alloys and Compounds,334,147-153.
MLA	M. Liu,et al."High-resolution transmission electron microscope (HRTEM) study of the transformation interface and substructure in NiTiHf40 melt-spun ribbons".Journal of Alloys and Compounds 334(2002):147-153.