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Modeling hardness of polycrystalline materials and bulk metallic glasses
文献类型：期刊论文
| 作者 | X. Q. Chen ; H. Y. Niu ; D. Z. Li ; Y. Y. Li |
| 刊名 | Intermetallics
 |
| 出版日期 | 2011 |
| 卷号 | 19期号:9页码:1275-1281 |
| 关键词 | Mechanical properties theory Elastic properties superhard rhenium diboride elastic-constants high-pressure mechanical-properties theoretical hardness ambient-pressure boron suboxide nitrides prediction carbides |
| ISSN号 | 0966-9795 |
| 中文摘要 | Though extensively studied, hardness, defined as the resistance of a material to deformation, still remains a challenging issue for a formal theoretical description due to its inherent mechanical complexity. The widely applied Teter's empirical correlation between hardness and shear modulus has been considered to be not always valid for a large variety of materials. The main reason is that shear modulus only responses to elastic deformation whereas the hardness links both elastic and permanent plastic properties. We found that the intrinsic correlation between hardness and elasticity of materials correctly predicts Vickers hardness for a wide variety of crystalline materials as well as bulk metallic glasses (BMGs). Our results suggest that, if a material is intrinsically brittle (such as BMGs that fail in the elastic regime), its Vickers hardness linearly correlates with the shear modulus (H(v) = 0.151G). This correlation also provides a robust theoretical evidence on the famous empirical correlation observed by Teter in 1998. On the other hand, our results demonstrate that the hardness of polycrystalline materials can be correlated with the product of the squared Pugh's modulus ratio and the shear modulus (H(v) = 2(k(2)G)(0.585) - 3 where k =G/B is Pugh's modulus ratio). Our work combines those aspects that were previously argued strongly, and, most importantly, is capable to correctly predict the hardness of all hard compounds known included in several pervious models. (C) 2011 Elsevier Ltd. All rights reserved. |
| 原文出处 | |
| 公开日期 | 2012-04-13 |
| 源URL | [http://210.72.142.130/handle/321006/30267]  |
| 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 | X. Q. Chen,H. Y. Niu,D. Z. Li,et al. Modeling hardness of polycrystalline materials and bulk metallic glasses[J]. Intermetallics,2011,19(9):1275-1281. |
| APA | X. Q. Chen,H. Y. Niu,D. Z. Li,&Y. Y. Li.(2011).Modeling hardness of polycrystalline materials and bulk metallic glasses.Intermetallics,19(9),1275-1281. |
| MLA | X. Q. Chen,et al."Modeling hardness of polycrystalline materials and bulk metallic glasses".Intermetallics 19.9(2011):1275-1281. |
入库方式： OAI收割
来源：金属研究所
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