| Shear transformation zone volume determining ductile–brittle transition of bulk metallic glasses | |
Jiang F; Jiang MQ(蒋敏强) ; Wang HF; Zhao YL; He L; Sun J; J. Sun
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| Source Publication | Acta Materialia
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| 2011 | |
| Volume | 59Issue:5Pages:2057-2068 |
| ISSN | 1359-6454 |
| Other Abstract | Three-point bending experiments were performed on as-cast and annealed samples of Zr52.5Cu17.9Ni14.6Al10Ti5 (Vit105) bulk metallic glasses over a wide range of temperatures varying from room temperature (293 K) to liquid nitrogen temperature (77 K). The results demonstrated that the free volume decrease due to annealing and/or cryogenic temperature can reduce the propensity for the formation of multiple shear bands and hence deteriorate plastic deformation ability. We clearly observed a sharp ductile-to-brittle transition (DBT), across which microscopic fracture feature transfers from micro-scale vein patterns to nano-scale periodic corrugations. Macroscopically, the corresponding fracture mode changes from ductile shear fracture to brittle tensile fracture. The shear transformation zone volume, taking into account free volume, temperature and strain rate, is proposed to quantitatively characterize the DBT behavior in fracture of metallic glasses. |
| Keyword | bulk Metallic Glass Shear Transformation Zone Tension Transformation Zone Free Volume Ductile-to-brittle Transition |
| Subject Area | 新型材料的力学问题 |
| DOI | 10.1016/j.actamat.2010.12.006 |
| URL | 查看原文 |
| Indexed By | SCI ; EI |
| Language | 英语 |
| WOS ID | WOS:000287775400020 |
| Department | LNM冲击动力学与新型材料力学性能 |
| Classification | 一类 |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://dspace.imech.ac.cn/handle/311007/43313 |
| Collection | 非线性力学国家重点实验室 |
| Corresponding Author | J. Sun |
| Recommended Citation GB/T 7714 | Jiang F,Jiang MQ(蒋敏强),Wang HF,等. Shear transformation zone volume determining ductile–brittle transition of bulk metallic glasses[J]. Acta Materialia,2011,59,5,:2057-2068. |
| APA | Jiang F.,Jiang MQ.,Wang HF.,Zhao YL.,He L.,...&J. Sun.(2011).Shear transformation zone volume determining ductile–brittle transition of bulk metallic glasses.Acta Materialia,59(5),2057-2068. |
| MLA | Jiang F,et al."Shear transformation zone volume determining ductile–brittle transition of bulk metallic glasses".Acta Materialia 59.5(2011):2057-2068. |
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