Microscopic deformation mechanism of a Ti66.1Nb13.9Ni4.8Cu8Sn7.2 nanostructure-dendrite composite
文献类型：期刊论文
| 作者 | K. B. Kim ; J. Das ; W. Xu ; Z. F. Zhang ; J. Eckert |
| 刊名 | Acta Materialia
 |
| 出版日期 | 2006 |
| 卷号 | 54期号:14页码:3701-3711 |
| 关键词 | plastic deformation compression test transmission electron microscopy phase transformation nanocomposite induced omega-phase enhanced plasticity ductile dendrites nb alloys microstructure shear |
| ISSN号 | 1359-6454 |
| 中文摘要 | Systematic investigations of the microstructural changes upon compression have been performed in order to elucidate the microscopic deformation mechanisms of the high-strength and ductile Ti66.1Nb13.9Ni4.8Cu8Sn7.2 nanostructure-dendrite composite. After 8% deformation, a rotation of beta-Ti dendrites is observed during the interaction of slip and shear bands. This rotation leads to the formation of new slip bands in the dendrites. The beta-Ti dendrites locally transform into omega phase during the interaction between the newly and the previously formed slip bands. The rotation of the dendrites causes local volume changes at the interfacial areas between the dendrites and the matrix, consisting of a mixture of hexagonal close-packed alpha-Ti and body-centered tetragonal Ti2Cu phases. This induces a rotational stress into the nanostructured matrix. After further deformation up to 25%, the shear bands penetrate the dendrite/matrix interfaces, producing extra interfaces. The nanostructured matrix exhibits a sandwiched microstructure in order to accommodate effectively the shear strains. These results suggest that structural coherency of the dendrite/matrix interfaces is important for controlling both the strength and the ductility of the nanostructure-dendrite composite. (c) 2006 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved. |
| 原文出处 | |
| 公开日期 | 2012-04-13 |
| 源URL | [http://ir.imr.ac.cn/handle/321006/34286]  |
| 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 | K. B. Kim,J. Das,W. Xu,et al. Microscopic deformation mechanism of a Ti66.1Nb13.9Ni4.8Cu8Sn7.2 nanostructure-dendrite composite[J]. Acta Materialia,2006,54(14):3701-3711. |
| APA | K. B. Kim,J. Das,W. Xu,Z. F. Zhang,&J. Eckert.(2006).Microscopic deformation mechanism of a Ti66.1Nb13.9Ni4.8Cu8Sn7.2 nanostructure-dendrite composite.Acta Materialia,54(14),3701-3711. |
| MLA | K. B. Kim,et al."Microscopic deformation mechanism of a Ti66.1Nb13.9Ni4.8Cu8Sn7.2 nanostructure-dendrite composite".Acta Materialia 54.14(2006):3701-3711. |
入库方式： OAI收割
来源：金属研究所
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