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Energy Dissipation In Fracture Of Bulk Metallic Glasses Via Inherent Competition Between Local Softening And Quasi-Cleavage
文献类型：期刊论文
| 作者 | Jiang MQ(蒋敏强) ; Ling Z(凌中); Meng JX(孟积兴); Dai LH(戴兰宏)
|
| 刊名 | Philosophical Magazine
 |
| 出版日期 | 2008 |
| 页码 | 407-426 |
| 通讯作者邮箱 | lhdai@lnm.imech.ac.cn |
| 关键词 | Ni-Cu-Be Amorphous-Alloys Shear Bands Dynamic Fracture Zr-Ti Mechanical-Properties Plastic-Deformation Hardening Material Flow Behavior |
| ISSN号 | 1478-6435 |
| 通讯作者 | Dai, LH (reprint author), Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100080, Peoples R China. |
| 中文摘要 | Compression, tension and high-velocity plate impact experiments were performed on a typical tough Zr41.2Ti13.8Cu10Ni12.5Be22.5 (Vit 1) bulk metallic glass (BMG) over a wide range of strain rates from similar to 10(-4) to 10(6) s(-1). Surprisingly, fine dimples and periodic corrugations on a nanoscale were also observed on dynamic mode I fracture surfaces of this tough Vit 1. Taking a broad overview of the fracture patterning of specimens, we proposed a criterion to assess whether the fracture of BMGs is essentially brittle or plastic. If the curvature radius of the crack tip is greater than the critical wavelength of meniscus instability [F. Spaepen, Acta Metall. 23 615 (1975); A.S. Argon and M. Salama, Mater. Sci. Eng. 23 219 (1976)], microscale vein patterns and nanoscale dimples appear on crack surfaces. However, in the opposite case, the local quasi-cleavage/separation through local atomic clusters with local softening in the background ahead of the crack tip dominates, producing nanoscale periodic corrugations. At the atomic cluster level, energy dissipation in fracture of BMGs is, therefore, determined by two competing elementary processes, viz. conventional shear transformation zones (STZs) and envisioned tension transformation zones (TTZs) ahead of the crack tip. Finally, the mechanism for the formation of nanoscale periodic corrugation is quantitatively discussed by applying the present energy dissipation mechanism. |
| 类目[WOS] | Materials Science, Multidisciplinary ; Mechanics ; Metallurgy & Metallurgical Engineering ; Physics, Applied ; Physics, Condensed Matter |
| 研究领域[WOS] | Materials Science ; Mechanics ; Metallurgy & Metallurgical Engineering ; Physics |
| 关键词[WOS] | NI-CU-BE ; AMORPHOUS-ALLOYS ; SHEAR BANDS ; DYNAMIC FRACTURE ; ZR-TI ; MECHANICAL-PROPERTIES ; PLASTIC-DEFORMATION ; HARDENING MATERIAL ; FLOW ; BEHAVIOR |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000253153400009 |
| 公开日期 | 2009-08-03 ; 2009-09-14 |
| 源URL | [http://dspace.imech.ac.cn/handle/311007/26130]  |
| 专题 | 力学研究所_力学所知识产出(1956-2008) |
| 推荐引用方式 GB/T 7714 | Jiang MQ,Ling Z,Meng JX,et al. Energy Dissipation In Fracture Of Bulk Metallic Glasses Via Inherent Competition Between Local Softening And Quasi-Cleavage[J]. Philosophical Magazine,2008:407-426. |
| APA | 蒋敏强,凌中,孟积兴,&戴兰宏.(2008).Energy Dissipation In Fracture Of Bulk Metallic Glasses Via Inherent Competition Between Local Softening And Quasi-Cleavage.Philosophical Magazine,407-426. |
| MLA | 蒋敏强,et al."Energy Dissipation In Fracture Of Bulk Metallic Glasses Via Inherent Competition Between Local Softening And Quasi-Cleavage".Philosophical Magazine (2008):407-426. |
入库方式： OAI收割
来源：力学研究所
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