| Onset and Direction of Shear Banding Instability in Metallic Glasses | |
| Chen Y(陈艳); Dai LH(戴兰宏); Dai, LH (reprint author), Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China. | |
| Source Publication | Journal of Materials Science & Technology
 |
| 2014-06 | |
| Volume | 30Issue:6Pages:616-621 |
| ISSN | 1005-0302 |
| Abstract | The shear banding instability occurs as the homogenous deformation in metallic glasses (MGs) develops to a critical point, at which the discontinuity in deformation rate is incipient across nano-scale shear bands. When and where the shear instability takes place is an important issue for understanding the shear band origin. However, such condition and direction of shear localization concerning the unique properties of MGs is still lacking for general stress state. In this paper, a new constitutive is introduced for MGs accounting for the pressure sensitivity, dilatancy and structural evolution; the shear banding is regarded as the appearance of instability in the constitutive description of inelastic deformation. Tying the bifurcation theory to the new constitutive, the general condition of deformation localization is derived. The shear band orientation corresponding to the easiest direction of shear instability is then obtained in dependence on pressure sensitivity, dilatancy and Poisson's ratio for MGs. The range of the predicted shear band angles is consistent with the experimental observations. |
| Keyword | Metallic Glasses Shear Banding Instability Bifurcation |
| Subject Area | Materials Science ; Metallurgy & Metallurgical Engineering |
| URL | 查看原文 |
| Indexed By | SCI ; EI |
| Language | 英语 |
| WOS ID | WOS:000340350300013 |
| Funding Organization | Financial support is from the National Key Basic Research Program of China (Grant No. 2012CB937500), the National Natural Science Foundation of China (Grants Nos. 11202221 and 11132011), and the CAS/SAFEA International Partnership Program for Creative Research Teams. |
| Department | LNM冲击动力学与新型材料力学性能 |
| Classification | 二类 |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://dspace.imech.ac.cn/handle/311007/49011 |
| Collection | 非线性力学国家重点实验室 |
| Corresponding Author | Dai, LH (reprint author), Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China. |
| Recommended Citation GB/T 7714 | Chen Y,Dai LH,Dai, LH . Onset and Direction of Shear Banding Instability in Metallic Glasses[J]. Journal of Materials Science & Technology,2014,30,6,:616-621. |
| APA | Chen Y,Dai LH,&Dai, LH .(2014).Onset and Direction of Shear Banding Instability in Metallic Glasses.Journal of Materials Science & Technology,30(6),616-621. |
| MLA | Chen Y,et al."Onset and Direction of Shear Banding Instability in Metallic Glasses".Journal of Materials Science & Technology 30.6(2014):616-621. |
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