Role of columnar structure on the fracture anisotropy of physical vapor deposited Al/SiC nanolaminates
文献类型：期刊论文
| 作者 | Shen, Sijia; Chen, Yunsheng; Yang, Lingwei; Feng, Yajie; Xu, Jian |
| 刊名 | MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
 |
| 出版日期 | 2020 |
| 卷号 | 786 |
| 关键词 | DEFORMATION MECHANISMS STRENGTH BEHAVIOR MICROSTRUCTURE ORIENTATION PLASTICITY DEPENDENCE SIZE |
| DOI | 10.1016/j.msea.2020.139387 |
| 英文摘要 | In this work, the effect of layer thickness on the mechanical anisotropy of physical vapor deposited Al/SiC nanolaminate was explored by micropillar compressions at directions perpendicular (90 degrees) and parallel (0 degrees) to layer orientations. The role of inherent columnar structure on the fracture mechanism at both loading directions is highlighted. The results show that the Al/SiC micropillar compressed at 90 degrees was strengthened significantly as the layer thickness reduced, due to the constraint of Al plasticity (imposed by stiff SiC layers) and ruptures of SiC layers, both were layer thickness dependent. The constraint was weakened by the ruptures of SiC layers and the inherent columnar structures. Finite element modeling evidences that the latter may trigger early formations of shear bands crossing multiple layers, leading to decreased strain hardening rate and ultimate compressive strength of the Al/SiC micropillar. The strengthening effect was reversed at 0 degrees, with lower strength obtained in thinner layered micropillars. Finite element modeling of micropillar compression suggests that this is mainly a consequence of the inherent columnar structure that weakens remarkably the compressive strength. |
| 学科主题 | Science & Technology - Other Topics ; Materials Science ; Metallurgy & Metallurgical Engineering |
| 源URL | [http://ir.nimte.ac.cn/handle/174433/20759]  |
| 专题 | 2020专题 2020专题_期刊论文 |
| 作者单位 | Yang, LW (corresponding author), China Aerodynam Res & Dev Ctr, Hyperveloc Aerodynam Inst, Mianyang 621000, Sichuan, Peoples R China. |
| 推荐引用方式 GB/T 7714 | Shen, Sijia,Chen, Yunsheng,Yang, Lingwei,et al. Role of columnar structure on the fracture anisotropy of physical vapor deposited Al/SiC nanolaminates[J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,2020,786. |
| APA | Shen, Sijia,Chen, Yunsheng,Yang, Lingwei,Feng, Yajie,&Xu, Jian.(2020).Role of columnar structure on the fracture anisotropy of physical vapor deposited Al/SiC nanolaminates.MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,786. |
| MLA | Shen, Sijia,et al."Role of columnar structure on the fracture anisotropy of physical vapor deposited Al/SiC nanolaminates".MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 786(2020). |
入库方式： OAI收割
来源：宁波材料技术与工程研究所
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