Knowledge Management System of Institue of Mechanics, CAS
| Comparison Of Shear Banding In Bmgs Due To Thermal-Softening And Free Volume Creation | |
Liu LF(刘龙飞) ; Dai LH(戴兰宏); Bai YL(白以龙); Ke FJ(柯孚久); Liu, LF (reprint author), Hunan Univ Sci & Technol, Hunan Prov Key Lab Hlth Maintenance Mech Equipmen, Xiangtan 411201, Peoples R China.
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| Source Publication | Science In China Series G-Physics Mechanics & Astronomy
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| 2008 | |
| Pages | 1367-1379 |
| ISSN | 1672-1799 |
| Abstract | This paper reports a comparative study of shear banding in BMGs resulting from thermal softening and free volume creation. Firstly, the effects of thermal softening and free volume creation on shear instability are discussed. It is known that thermal softening governs thermal shear banding, hence it is essentially energy related. However, compound free volume creation is the key factor to the other instability, though void-induced softening seems to be the counterpart of thermal softening. So, the driving force for shear instability owing to free volume creation is very different from the thermally assisted one. In particular, long wave perturbations are always unstable owing to compound free volume creation. Therefore, the shear instability resulting from coupled compound free volume creation and thermal softening may start more like that due to free volume creation. Also, the compound free volume creation implies a specific and intrinsic characteristic growth time of shear instability. Finally, the mature shear band width is governed by the corresponding diffusions (thermal or void diffusion) within the band. As a rough guide, the dimensionless numbers: Thermal softening related number B, Deborah number (denoting the relation of instability growth rate owing to compound free volume and loading time) and Lewis number (denoting the competition of different diffusions) show us their relative importance of thermal softening and free volume creation in shear banding. All these results are of particular significance in understanding the mechanism of shear banding in bulk metallic glasses (BMGs). |
| Keyword | Metallic Glasses Shear Bands Diffusion Instability Bulk Metallic-glass Deformation-behavior Plastic-deformation Amorphous-alloys Flow Localization Failure Solids Damage |
| DOI | 10.1007/s11433-008-0133-3 |
| Indexed By | SCI |
| Language | 英语 |
| WOS ID | WOS:000258317000018 |
| WOS Keyword | BULK METALLIC-GLASS ; DEFORMATION-BEHAVIOR ; PLASTIC-DEFORMATION ; AMORPHOUS-ALLOYS ; FLOW ; LOCALIZATION ; FAILURE ; SOLIDS ; DAMAGE |
| WOS Research Area | Physics |
| WOS Subject | Physics, Multidisciplinary |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://dspace.imech.ac.cn/handle/311007/25926 |
| Collection | 力学所知识产出(1956-2008) |
| Corresponding Author | Liu, LF (reprint author), Hunan Univ Sci & Technol, Hunan Prov Key Lab Hlth Maintenance Mech Equipmen, Xiangtan 411201, Peoples R China. |
| Recommended Citation GB/T 7714 | Liu LF,Dai LH,Bai YL,et al. Comparison Of Shear Banding In Bmgs Due To Thermal-Softening And Free Volume Creation[J]. Science In China Series G-Physics Mechanics & Astronomy,2008:1367-1379. |
| APA | 刘龙飞,戴兰宏,白以龙,柯孚久,&Liu, LF .(2008).Comparison Of Shear Banding In Bmgs Due To Thermal-Softening And Free Volume Creation.Science In China Series G-Physics Mechanics & Astronomy,1367-1379. |
| MLA | 刘龙飞,et al."Comparison Of Shear Banding In Bmgs Due To Thermal-Softening And Free Volume Creation".Science In China Series G-Physics Mechanics & Astronomy (2008):1367-1379. |
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