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Reformation Capability of Short-Range Order and Their Medium-Range Connections Regulates Deformability of Bulk Metallic Glasses
Li, Congling1,2; Wei, Yujie1; Shi, Xinghua1; Shi, XH (reprint author), Chinese Acad Sci, Inst Mech, LNM, Beijing 100190, Peoples R China.
2015-07-16
发表期刊SCIENTIFIC REPORTS
卷号5页码:12177
ISSN2045-2322
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
DOI10.1038/srep12177
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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)
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被引频次:3[WOS]   [WOS记录]     [WOS相关记录]
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
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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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