Yield strength of "brittle" metallic glass

doi:10.1016/j.jmst.2022.12.017

IMR OpenIR

	Yield strength of "brittle" metallic glass
	Qu, Ruitao 1,2,3; Volkert, Cynthia A.2; Zhang, Zhefeng 3; Liu, Feng 1
通讯作者	Qu, Ruitao(rtqu@nwpu.edu.cn) ; Liu, Feng(liufeng@nwpu.edu.cn)
	2023-06-20
发表期刊	JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
ISSN	1005-0302
卷号	149 页码:247-254
摘要	"Brittle" metallic glass (MG) usually fractures catastrophically in a shattering mode under macroscopic compression, because cleavage cracking of splitting that originates from extrinsic flaws dominates the failure of such alloys, which brings challenges for studying yield strength. Here we show that the plastic yielding behavior in a brittle Fe-based MG can be successfully activated by decreasing the sample size to micrometer scale to avoid the possible large tensile stress concentrators. The yield strength was found to be at least 33% higher than the fracture strength measured with bulk samples for the present brittle MG. The results further demonstrate that the critical stresses for shear band initiation and propagation are size-independent, while the required stress for cleavage cracking increases with decreasing sample size. The competition of thermodynamic driving forces between the two processes of shear banding and cleavage cracking hence leads to the size-induced brittle-to ductile-transition. These findings clarify the physical nature of the strength of "brittle" MG, implying the great opportunity for using high-strength brittle MGs in devices with small dimensions. (c) 2023 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology.
关键词	Metallic glass Yield strength Fracture Shear band Cracking
资助者	National Natural Science Foundation of China (NSFC) ; Natural Science Foundation of Liaoning Province ; Northwestern Polytechnical Uni- versity ; Northwestern Polytechnical University
DOI	10.1016/j.jmst.2022.12.017
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China (NSFC)[51771205] ; National Natural Science Foundation of China (NSFC)[52271072] ; Natural Science Foundation of Liaoning Province[2020 -MS-011] ; Northwestern Polytechnical Uni- versity ; Northwestern Polytechnical University
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS记录号	WOS:000991812900001
出版者	JOURNAL MATER SCI TECHNOL
引用统计	被引频次：2[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/321006/177768
专题	中国科学院金属研究所
通讯作者	Qu, Ruitao; Liu, Feng
作者单位	1.Northwestern Polytech Univ, Sch Mat Sci & Engn, State Key Lab Solidificat Proc, Xian 710072, Peoples R China 2.Univ Gottingen, Inst Mat Phys, Friedrich Hund Pl 1, D-37077 Gottingen, Germany 3.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Qu, Ruitao,Volkert, Cynthia A.,Zhang, Zhefeng,et al. Yield strength of "brittle" metallic glass[J]. JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,2023,149:247-254.
APA	Qu, Ruitao,Volkert, Cynthia A.,Zhang, Zhefeng,&Liu, Feng.(2023).Yield strength of "brittle" metallic glass.JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,149,247-254.
MLA	Qu, Ruitao,et al."Yield strength of "brittle" metallic glass".JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY 149(2023):247-254.