HRTEM analysis of nanocrystallization during umaxial compression of a bulk metallic glass at room temperature

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	HRTEM analysis of nanocrystallization during umaxial compression of a bulk metallic glass at room temperature
	Y. F. Deng; L. L. He; Q. S. Zhang; H. F. Zhang; H. Q. Ye
	2004
发表期刊	Ultramicroscopy
ISSN	0304-3991
卷号	98 期号:2-4 页码:201-208
摘要	Nanocrystallization during deformation of metallic glass at room temperature has significant implications to understand its deformation mechanism. We present here direct high-resolution transmission electron microscopy (HRTEM) observations of nanocrystallization in a Zr(55)AI(10)Ni(5)Cu(30) bulk metallic glass (BMG) fractured by uniaxial compression at room temperature. The formed nanocrystallites are Zr2Cu, with the average diameter of less than 10 nm, and are distributed within the round-like regions of localized plastic deformation. We also show direct evidence of atomic neighbor distance increases associated with the shrinkage and broadening of diffused ring pattern from local deformed areas, which may enhance atomic mobility so that nanocrystallization occurred. Our results demonstrate that the origin of the room-temperature deformation of BMG can be attributed to the local atomic spacing increases induced by localization of plastic flow under uniaxial compression test. (C) 2003 Elsevier B.V. All rights reserved.
部门归属	chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china. shenyang normal univ, dept phys, shenyang 110034, peoples r china.;ye, hq (reprint author), chinese acad sci, inst met res, shenyang natl lab mat sci, 72 wenhua rd, shenyang 110016, peoples r china;hqye@imr.ac.cn
关键词	High-resolution Transmission Electron Microscopy Bulk Metallic Glass Plastic Deformation Nanocrystallization Amorphous-alloys Mechanical-properties Supercooled Liquid Behavior Crystallization Deformation Nanoindentation Plasticity Fracture Flow
URL	查看原文
WOS记录号	WOS:000220821900014
引用统计	被引频次：22[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/321006/35340
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	Y. F. Deng,L. L. He,Q. S. Zhang,et al. HRTEM analysis of nanocrystallization during umaxial compression of a bulk metallic glass at room temperature[J]. Ultramicroscopy,2004,98(2-4):201-208.
APA	Y. F. Deng,L. L. He,Q. S. Zhang,H. F. Zhang,&H. Q. Ye.(2004).HRTEM analysis of nanocrystallization during umaxial compression of a bulk metallic glass at room temperature.Ultramicroscopy,98(2-4),201-208.
MLA	Y. F. Deng,et al."HRTEM analysis of nanocrystallization during umaxial compression of a bulk metallic glass at room temperature".Ultramicroscopy 98.2-4(2004):201-208.