IMR OpenIR
Origin of anomalous inverse notch effect in bulk metallic glasses
Pan, J.; Zhou, H. F.; Wang, Z. T.; Li, Y.; Gao, H. J.; liyi@imr.ac.cn; huajian_gao@brown.edu
2015
Source PublicationJOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS
ISSN0022-5096
Volume84Pages:85-94
AbstractUnderstanding notch-related failure is crucial for the design of reliable engineering structures. However, substantial controversies exist in the literature on the notch effect in bulk metallic glasses (BMGs), and the underlying physical mechanism responsible for the apparent confusion is still poorly understood. Here we investigate the physical origin of an inverse notch effect in a Zr-based metallic glass, where the tensile strength of the material is dramatically enhanced, rather than decreased (as expected from the stress concentration point of view), by introduction of a notch. Our experiments and molecular dynamics simulations show that the seemingly anomalous inverse notch effect is in fact caused by a transition in failure mechanism from shear banding at the notch tip to cavitation and void coalescence. Based on our theoretical analysis, the transition occurs as the stress triaxiality in the notched sample exceeds a material-dependent threshold value. Our results fill the gap in the current understanding of BMG strength and failure mechanism by resolving the conflicts on notch effects and may inspire re-interpretation of previous reports on BMG fracture toughness where pre-existing notches were routinely adopted. (C) 2015 Elsevier Ltd. All rights reserved.
description.department[pan, j. ; li, y.] chinese acad sci, shenyang natl lab mat sci, inst met res, shenyang 110016, peoples r china ; [zhou, h. f. ; gao, h. j.] brown univ, sch engn, providence, ri 02912 usa ; [zhou, h. f.] tsinghua univ, dept engn mech, ctr adv mech & mat, aml, beijing 100084, peoples r china ; [wang, z. t. ; li, y.] natl univ singapore, dept mat sci & engn, singapore 117576, singapore
KeywordBulk Metallic Glasses Notch Strength Shear Band Cavitation
Funding OrganizationNational Nature Science Foundation of China [51401220, 51471165]; National Science Foundation [CMMI-1161749]; Center of Mechanics and Materials at Tsinghua University
Indexed Bysci
Language英语
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/75041
Collection中国科学院金属研究所
Corresponding Authorliyi@imr.ac.cn; huajian_gao@brown.edu
Recommended Citation
GB/T 7714
Pan, J.,Zhou, H. F.,Wang, Z. T.,et al. Origin of anomalous inverse notch effect in bulk metallic glasses[J]. JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS,2015,84:85-94.
APA Pan, J..,Zhou, H. F..,Wang, Z. T..,Li, Y..,Gao, H. J..,...&huajian_gao@brown.edu.(2015).Origin of anomalous inverse notch effect in bulk metallic glasses.JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS,84,85-94.
MLA Pan, J.,et al."Origin of anomalous inverse notch effect in bulk metallic glasses".JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS 84(2015):85-94.
Files in This Item:
There are no files associated with this item.
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Pan, J.]'s Articles
[Zhou, H. F.]'s Articles
[Wang, Z. T.]'s Articles
Baidu academic
Similar articles in Baidu academic
[Pan, J.]'s Articles
[Zhou, H. F.]'s Articles
[Wang, Z. T.]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Pan, J.]'s Articles
[Zhou, H. F.]'s Articles
[Wang, Z. T.]'s Articles
Terms of Use
No data!
Social Bookmark/Share
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.