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Title:
Enhanced tensile plasticity of Zr based bulk metallic glasses by a stress induced large scale flow
Author: Dong J; Gao M; Huan Y(郇勇); Feng YH(冯义辉); Liu, W.; Wang, W. H.
Source: JOURNAL OF ALLOYS AND COMPOUNDS
Issued Date: 2017-12-15
Volume: 727, Pages:297-303
Abstract:

Tensile plasticity in a Zr-based bulk metallic glasses is achieved through a stress induced large-scale flow. The large-scale flow is activated in a complex stress field which is produced by introducing micro-pits array on specimen surfaces using a laser engraving technique. A flame-like fracture morphology with bigger size (about 10 mu m in height) is observed on the fracture surface of specimen, indicating that the size of flow here is far beyond the size of that induced by shear bands. Theoretical analysis accompanied with finite elements modeling (FEM) reveal that the form of high shear zones agrees well with that of the large-scale flow, suggesting that the flow form is changed by the complex stress field. After a comprehensive analyze, the intense shear and suppressing shear bands are concluded to be the two necessary conditions for the stress induced large scale flow. (C) 2017 Elsevier B.V. All rights reserved.

Keyword: Bulk metallic glasses ; Large scale flow ; Tensile plasticity ; Laser-engraving ; Finite element modeling
Language: 英语
Indexed Type: SCI ; EI
DOI: 10.1016/j.jallcom.2017.08.046
Related URLs: 查看原文
DOC Type: Article
WOS Subject: Chemistry, Physical ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS Subject Extended: Chemistry ; Materials Science ; Metallurgy & Metallurgical Engineering
WOS Keyword Plus: SHEAR BANDS ; DUCTILITY ; ALLOYS
WOS ID: WOS:000412712900037
ISSN: 0925-8388
Funder: National Natural Science Foundation of China(11372323 ; MOST 973 of China(2015CB856800) ; CAS ; 11302231)
Department: LNM实验平台
Classification: 一类
Ranking: 1
Citation statistics:
Content Type: 期刊论文
URI: http://dspace.imech.ac.cn/handle/311007/70080
Appears in Collections:非线性力学国家重点实验室_期刊论文

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Recommended Citation:
Dong J,Gao M,Huan Y,et al. Enhanced tensile plasticity of Zr based bulk metallic glasses by a stress induced large scale flow[J]. JOURNAL OF ALLOYS AND COMPOUNDS,2017-12-15,727:297-303.
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