Strain-hardening under uniaxial tension in a rejuvenated bulk metallic glass

doi:10.1016/j.scriptamat.2022.114572

CORC > 金属研究所 > 中国科学院金属研究所

	Strain-hardening under uniaxial tension in a rejuvenated bulk metallic glass
	Zhou, W. H.2,3; Panagiotopoulos, N. T.1; Greer, A. L.1; Li, Y.3
刊名	SCRIPTA MATERIALIA
	2022-04-15
卷号	212 页码:5
关键词	Metallic glass Work-hardening Ductility Fracture Tensile testing
ISSN号	1359-6462
DOI	10.1016/j.scriptamat.2022.114572
通讯作者	Greer, A. L.(alg13@cam.ac.uk) ; Li, Y.(liyi@imr.ac.cn)
英文摘要	A rejuvenated Zr-based bulk metallic glass is tested in tension: it shows strain-hardening and reaches 0.9% plastic strain at failure. The initial rate of increase of flow stress with strain is 73 GPa, much higher than normal for polycrystalline metals and alloys. This hardening rate and its decay with increasing strain are compared with published data on a representative range of conventional and novel alloys. Taking the onset of necking as failure, and using Considere's analysis, we conclude that the metallic glass, however much rejuvenated, is limited to tensile plastic strains of approximately 1%, because of the rapid decay of hardening rate with strain. Rejuvenation of the metallic glass blocks early catastrophic failure in a predominant shear orientation. In comparison with as-cast samples, the fracture surface of the rejuvenated sample is more rugged and the characteristic vein pattern is denser. The effects of rejuvenation on abrasive-wear behavior are also examined. (c) 2022 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
资助项目	European Research Council[ERC-2015-AdG-695487] ; Shenyang National Laboratory for Materials Science
WOS研究方向	Science & Technology - Other Topics ; Materials Science ; Metallurgy & Metallurgical Engineering
语种	英语
出版者	PERGAMON-ELSEVIER SCIENCE LTD
WOS记录号	WOS:000790970200008
资助机构	European Research Council ; Shenyang National Laboratory for Materials Science
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/173911]
专题	金属研究所_中国科学院金属研究所
通讯作者	Greer, A. L.; Li, Y.
作者单位	1.Univ Cambridge, Dept Mat Sci & Met, Cambridge CB3 0FS, England 2.Univ Sci & Technol China, Sch Mat Sci & Engn, Hefei 230026, Peoples R China 3.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Zhou, W. H.,Panagiotopoulos, N. T.,Greer, A. L.,et al. Strain-hardening under uniaxial tension in a rejuvenated bulk metallic glass[J]. SCRIPTA MATERIALIA,2022,212:5.
APA	Zhou, W. H.,Panagiotopoulos, N. T.,Greer, A. L.,&Li, Y..(2022).Strain-hardening under uniaxial tension in a rejuvenated bulk metallic glass.SCRIPTA MATERIALIA,212,5.
MLA	Zhou, W. H.,et al."Strain-hardening under uniaxial tension in a rejuvenated bulk metallic glass".SCRIPTA MATERIALIA 212(2022):5.