A statistical model for predicting the mechanical properties of nanostructured metals with bimodal grain size distribution
文献类型：期刊论文
| 作者 | L. L. Zhu ; S. Q. Shi ; K. Lu ; J. Lu |
| 刊名 | Acta Materialia
 |
| 出版日期 | 2012 |
| 卷号 | 60期号:16页码:5762-5772 |
| 关键词 | Bimodal grain size distribution Strength Ductility Weibull probability distribution Percolation model high-tensile ductility plastic-deformation high-strength nanocrystalline metals enhanced plasticity boundary diffusion al-alloy copper behavior cracks |
| ISSN号 | 1359-6454 |
| 中文摘要 | A statistical analysis is employed to investigate the mechanical performance of nanostructured metals with bimodal grain size distribution. The contributions of microcracks in the plastic deformation are accounted for in the mechanism-based plastic model used to describe the strength and ductility of the bimodal metals. The strain-based Weibull probability distribution function and percolation analysis of microcracked solids are applied to predict the failure behavior of the bimodal metals. The numerical results show that the proposed model can describe the mechanical properties of the bimodal metals, including yield strength, strain hardening and uniform elongation. These predictions agree well with the experimental results. The stochastic approaches adopted in the proposed model successfully capture the failure behavior of bimodal coppers that are sensitive to grain size and the volume fraction of coarse grains in addition to the corresponding threshold for percolation. These results will benefit the optimization of both strength and ductility by controlling constituent fractions and the size of the microstructures in materials. (C) 2012 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved. |
| 原文出处 | |
| 公开日期 | 2013-02-05 |
| 源URL | [http://ir.imr.ac.cn/handle/321006/60540]  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 推荐引用方式 GB/T 7714 | L. L. Zhu,S. Q. Shi,K. Lu,et al. A statistical model for predicting the mechanical properties of nanostructured metals with bimodal grain size distribution[J]. Acta Materialia,2012,60(16):5762-5772. |
| APA | L. L. Zhu,S. Q. Shi,K. Lu,&J. Lu.(2012).A statistical model for predicting the mechanical properties of nanostructured metals with bimodal grain size distribution.Acta Materialia,60(16),5762-5772. |
| MLA | L. L. Zhu,et al."A statistical model for predicting the mechanical properties of nanostructured metals with bimodal grain size distribution".Acta Materialia 60.16(2012):5762-5772. |
入库方式： OAI收割
来源：金属研究所
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