Thermal stability and mechanical properties of nanostructured Ti-24Nb-4Zr-7.9Sn alloy
文献类型：期刊论文
| 作者 | S. J. Li ; Y. W. Zhang ; B. B. Sun ; Y. L. Hao ; R. Yang |
| 刊名 | Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing
 |
| 出版日期 | 2008 |
| 卷号 | 480期号:1-2页码:101-108 |
| ISSN号 | 0921-5093 |
| 关键词 | mechanical properties thermal stability nanostructuring titanium alloy severe plastic-deformation shape-memory alloys grain-refinement behavior kinetics growth titanium copper ecap |
| 中文摘要 | Thermal stability of the nanostructured grains of cold-rolled Ti-24Nb-4Zr-7.9Sn alloy and corresponding variations in mechanical properties were investigated. The activation energy for grain growth was found distinct below and above the (a + beta)/beta transus of similar to 950 K, with values of similar to 47 and similar to 206 kJ/mol, respectively. Due to the pinning effect of the a precipitates at P grain boundaries, grains sizes can be maintained at less than 100 nm during prolonged annealing at temperatures up to 773 K, and are less than 1 mu m for annealing temperature up to 923 K and time up to 2 h. Annealing above the P transus resulted in coarse grains with sizes of tens of micrometers in less than 2 h. Tensile and hardness tests showed rapid strengthening with the increase of annealing time below 773 K, which was attributed to both the rapid formation of nano-sized a precipitates and the slow growth rate of P grains. By adjusting the grain size of the cold-rolled material the high strength/low Young's modulus match desirable for implant applications can be improved over the hot-rolled bars with coarse grains. (c) 2007 Published by Elsevier B.V. |
| 原文出处 | |
| 公开日期 | 2012-04-13 |
| 源URL | [http://210.72.142.130/handle/321006/32891]  |
| 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 | S. J. Li,Y. W. Zhang,B. B. Sun,et al. Thermal stability and mechanical properties of nanostructured Ti-24Nb-4Zr-7.9Sn alloy[J]. Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing,2008,480(1-2):101-108. |
| APA | S. J. Li,Y. W. Zhang,B. B. Sun,Y. L. Hao,&R. Yang.(2008).Thermal stability and mechanical properties of nanostructured Ti-24Nb-4Zr-7.9Sn alloy.Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing,480(1-2),101-108. |
| MLA | S. J. Li,et al."Thermal stability and mechanical properties of nanostructured Ti-24Nb-4Zr-7.9Sn alloy".Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing 480.1-2(2008):101-108. |
入库方式： OAI收割
来源：金属研究所
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