Bending proof strength of Zr61Ti2Cu25Al12 bulk metallic glass and its correlation with shear-banding initiation

doi:10.1016/j.intermet.2020.106915

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	Bending proof strength of Zr61Ti2Cu25Al12 bulk metallic glass and its correlation with shear-banding initiation
	Li, Diao-Feng 1,2; Shen, Yong 1; Xu, Jian 1
刊名	INTERMETALLICS
	2020-11-01
卷号	126 页码:12
关键词	Metallic glasses Yield behavior Bending Mechanical testing Shear band MicroElectroMechanical (MEMS) NanoElectroMechanical NEMS
ISSN号	0966-9795
DOI	10.1016/j.intermet.2020.106915
通讯作者	Xu, Jian(jianxu@imr.ac.cn)
英文摘要	Bending proof strength (sigma(p)) is a key material property for spring-like flexible components. In this work, initial yielding behavior of Zr61Ti2Cu25Al12 (ZT1) bulk metallic glass (BMG) in bending was investigated by an approach of stepwise cyclic loading-unloading under three-point bending (3 PB). It was shown that to meet the requirement of small-deflection condition in mechanics, a range of span-to-thickness ratio was specified at 10-15 for the BMGs subjected to 3 PB, which is one order of magnitude less than that of conventional polycrystalline metals. With conventional monotonic loading tests, the modulus of elasticity in bending and the proportional limit/flexural yield strength of the ZT1 BMG were determined to be E-b = 84 GPa and 2070 MPa, respectively. Combining stepwise loading-unloading with LOM observations alternately, it was shown that apparent yielding response of ZT1 beam in bending directly correlates with the event of first shear-band initiation. With an approach of stepwise cyclic loading-unloading with a measure in high accuracy, the sigma(p) at a permanent strain of 0.005% for the ZT1 BMG was determined to be 1900 +/- 10 MPa. It is noticeable that the sigma(p) of ZT1 BMG is similar to 16% higher than its uniaxial tensile strength. In addition, high modulus of resilience (22 MJ/m(3)) in bending for this BMG manifest significant advantage as a candidate material of flexible components in engineering.
资助项目	National Natural Science Foundation of China[51571192]
WOS研究方向	Chemistry ; Materials Science ; Metallurgy & Metallurgical Engineering
语种	英语
出版者	ELSEVIER SCI LTD
WOS记录号	WOS:000579759400009
资助机构	National Natural Science Foundation of China
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/141022]
专题	金属研究所_中国科学院金属研究所
通讯作者	Xu, Jian
作者单位	1.Chinese Acad Sci, Inst Met Res, 72 Wenhua Rd, Shenyang 110016, Peoples R China 2.Univ Sci & Technol China, Sch Mat Sci & Engn, 72 Wenhua Rd, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Li, Diao-Feng,Shen, Yong,Xu, Jian. Bending proof strength of Zr61Ti2Cu25Al12 bulk metallic glass and its correlation with shear-banding initiation[J]. INTERMETALLICS,2020,126:12.
APA	Li, Diao-Feng,Shen, Yong,&Xu, Jian.(2020).Bending proof strength of Zr61Ti2Cu25Al12 bulk metallic glass and its correlation with shear-banding initiation.INTERMETALLICS,126,12.
MLA	Li, Diao-Feng,et al."Bending proof strength of Zr61Ti2Cu25Al12 bulk metallic glass and its correlation with shear-banding initiation".INTERMETALLICS 126(2020):12.