Reformation Capability of Short-Range Order and Their Medium-Range Connections Regulates Deformability of Bulk Metallic Glasses

doi:10.1038/srep12177

IMECH-IR > 非线性力学国家重点实验室

	Reformation Capability of Short-Range Order and Their Medium-Range Connections Regulates Deformability of Bulk Metallic Glasses
	Li, Congling 1,2; Wei, Yujie1 ; Shi, Xinghua1 ; Shi, XH (reprint author), Chinese Acad Sci, Inst Mech, LNM, Beijing 100190, Peoples R China.
发表期刊	SCIENTIFIC REPORTS
	2015-07-16
卷号	5 页码:12177
ISSN	2045-2322
摘要	Metallic glasses (MGs) typically have high yield strength while low ductility, and the latter is commonly considered as the Achilles' heel of MGs. Elucidate the mechanism for such low ductility becomes the research focus of this field. With molecular level simulations, we show the degree of short-range order (SRO) of atomic structure for brittle Fe-based glass decreases dramatically during the stretch, while mild change occurs in ductile Zr-based glass. The reformation capability for SRO and their medium-range connections is found to be the primary characteristics to differentiate the deformability between the two metallic glasses. We suspect that, in addition to the strength of networks formed by SRO structure, the reformation capability to reform SRO networks also plays the key role in regulating the ductility in metallic glasses. Our study provides important insights into the understanding about the mechanisms accounting for ductility or brittleness of bulk metallic glasses.; Metallic glasses (MGs) typically have high yield strength while low ductility, and the latter is commonly considered as the Achilles' heel of MGs. Elucidate the mechanism for such low ductility becomes the research focus of this field. With molecular level simulations, we show the degree of short-range order (SRO) of atomic structure for brittle Fe-based glass decreases dramatically during the stretch, while mild change occurs in ductile Zr-based glass. The reformation capability for SRO and their medium-range connections is found to be the primary characteristics to differentiate the deformability between the two metallic glasses. We suspect that, in addition to the strength of networks formed by SRO structure, the reformation capability to reform SRO networks also plays the key role in regulating the ductility in metallic glasses. Our study provides important insights into the understanding about the mechanisms accounting for ductility or brittleness of bulk metallic glasses.
学科领域	Science & Technology - Other Topics
DOI	10.1038/srep12177
URL	查看原文
收录类别	SCI
语种	英语
WOS记录号	WOS:000358008100001
关键词[WOS]	MOLECULAR-DYNAMICS ; DEFORMATION ; FLOW ; PLASTICITY ; BEHAVIOR ; FRACTURE ; DUCTILE ; SOLIDS ; MODEL
WOS研究方向	Science & Technology - Other Topics
WOS类目	Multidisciplinary Sciences
项目资助者	National Natural Science Foundation of China (NSFC) [11023001, 11425211]
课题组名称	LNM微结构计算力学（筹）
论文分区	一类
引用统计
文献类型	期刊论文
条目标识符	http://dspace.imech.ac.cn/handle/311007/55332
专题	非线性力学国家重点实验室
通讯作者	Shi, XH (reprint author), Chinese Acad Sci, Inst Mech, LNM, Beijing 100190, Peoples R China.
作者单位	1.Chinese Acad Sci, Inst Mech, LNM, Beijing 100190, Peoples R China 2.Luoyang Inst Sci & Technol, Sch Civil Engn, Luoyang 471023, Henan Province, Peoples R China
推荐引用方式 GB/T 7714	Li, Congling,Wei, Yujie,Shi, Xinghua,et al. Reformation Capability of Short-Range Order and Their Medium-Range Connections Regulates Deformability of Bulk Metallic Glasses[J]. SCIENTIFIC REPORTS,2015,5:12177.
APA	Li, Congling,Wei, Yujie,Shi, Xinghua,&Shi, XH .(2015).Reformation Capability of Short-Range Order and Their Medium-Range Connections Regulates Deformability of Bulk Metallic Glasses.SCIENTIFIC REPORTS,5,12177.
MLA	Li, Congling,et al."Reformation Capability of Short-Range Order and Their Medium-Range Connections Regulates Deformability of Bulk Metallic Glasses".SCIENTIFIC REPORTS 5(2015):12177.

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