Molecular dynamics simulation of fracture behaviors of 〈110〉 tilt grain boundaries in γ-TiAl
文献类型：期刊论文
| 作者 | Zhao Wenjuan2; Xu Dongsheng3; Zhao Jingwei1; Wang Hao3 |
| 刊名 | Transactions of Nonferrous Metals Society of China
 |
| 出版日期 | 2014 |
| 卷号 | 24期号:11页码:3645-3651 |
| 关键词 | γ-TiAl合金 倾斜晶界 分子动力学 拉伸变形 断裂 |
| ISSN号 | 1003-6326 |
| 其他题名 | Molecular dynamics simulation of fracture behaviors of 〈110〉 tilt grain boundaries in γ-TiAl |
| 英文摘要 | Molecular dynamics (MD) simulations were carried out to study the fracture behaviors of several symmetric tilt grain boundaries in γ-TiAl bicrystals with 〈110〉 misorientation axes. Tensile deformation along direction perpendicular to grain boundary was simulated under various strain rates and temperatures. The results indicate that the relative orientation of the grains and the presence of certain atom units are two critical factors of the interface structure affecting the stress required for dislocation nucleation. Dislocations nucleate and extend at or near the symmetric tilt grain boundaries during the tensile deformation of Σ3 (111) 109.5°, Σ9 (221) 141.1° and Σ27 (552) 148.4° interfaces. For Σ27 (115) 31.6° and Σ11 (113) 50.5° interfaces, the interfaces fractured directly in a cleavage manner due to no dislocation emitted from the boundary. The tensile fracture mechanisms of the bicrystals are that micro-cracks nucleate at the grain boundary and propagate along the interface. The variance of crack propagation is whether there is accommodation of plastic region at the crack tips. |
| 语种 | 英语 |
| CSCD记录号 | CSCD:5317058 |
| 源URL | [http://ir.imr.ac.cn/handle/321006/143666]  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 作者单位 | 1.卧龙岗大学 2.湘潭大学 3.中国科学院金属研究所 |
| 推荐引用方式 GB/T 7714 | Zhao Wenjuan,Xu Dongsheng,Zhao Jingwei,等. Molecular dynamics simulation of fracture behaviors of 〈110〉 tilt grain boundaries in γ-TiAl[J]. Transactions of Nonferrous Metals Society of China,2014,24(11):3645-3651. |
| APA | Zhao Wenjuan,Xu Dongsheng,Zhao Jingwei,&Wang Hao.(2014).Molecular dynamics simulation of fracture behaviors of 〈110〉 tilt grain boundaries in γ-TiAl.Transactions of Nonferrous Metals Society of China,24(11),3645-3651. |
| MLA | Zhao Wenjuan,et al."Molecular dynamics simulation of fracture behaviors of 〈110〉 tilt grain boundaries in γ-TiAl".Transactions of Nonferrous Metals Society of China 24.11(2014):3645-3651. |
入库方式： OAI收割
来源：金属研究所
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