Microstructural stability of lamellar TiAl-based alloys at high temperature
文献类型：期刊论文
| 作者 | G. L. Chen ; L. C. Zhang ; W. J. Zhang |
| 刊名 | Intermetallics
 |
| 出版日期 | 1999 |
| 卷号 | 7期号:11页码:1211-1218 |
| 关键词 | titanium aluminides defects defects based on TiAl dislocation geometry and planar faults arrangement alpha(2)/gamma interfacial structure deformed ti-45al-10nb alloy creep resistance deformation |
| ISSN号 | 0966-9795 |
| 中文摘要 | The microstructural stability of lamellar TiAl-base alloys at high temperature was studied by conventional and high-resolution transmission electron microscopy. This paper emphasized the influence of substructures on the thermal stability of lamellar structure. These substructures produced by thermal mechanical treatments include lattice dislocations and boundary dislocations, the subgrain boundaries, the impinged T (Q) twins and misorientated multi-ledges lamellar interface boundaries. Three dual-phase TiAl based alloys containing different type and density of substructures were produced by different thermomechanical treatments. The microstructural changes in these dual phase TiAl-base alloys were compared after exposure at 800-1000 degrees C. It was found that the existence of such substructures could accelerate the degeneration of lamellar structure, leading to the rapid necking and break-up of alpha(2) plates, the coarsening of gamma plates, and the formation of new gamma grains. A detailed description of various degeneration processes was given in the paper. As a result, the lamellar structure with heavy substructures started to degenerate after thermal exposure at 800 degrees C for 4.5 h. While only slight coarsening was observed at the colony boundaries in the lamellar structure without substructures even after exposure at 900 degrees C for 7 days. (C) 1999 Elsevier Science Ltd. All rights reserved. |
| 原文出处 | |
| 公开日期 | 2012-04-14 |
| 源URL | [http://ir.imr.ac.cn/handle/321006/37321]  |
| 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 | G. L. Chen,L. C. Zhang,W. J. Zhang. Microstructural stability of lamellar TiAl-based alloys at high temperature[J]. Intermetallics,1999,7(11):1211-1218. |
| APA | G. L. Chen,L. C. Zhang,&W. J. Zhang.(1999).Microstructural stability of lamellar TiAl-based alloys at high temperature.Intermetallics,7(11),1211-1218. |
| MLA | G. L. Chen,et al."Microstructural stability of lamellar TiAl-based alloys at high temperature".Intermetallics 7.11(1999):1211-1218. |
入库方式： OAI收割
来源：金属研究所
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