Microstructure study of a gamma-TiAl based alloy containing W and Si
文献类型：期刊论文
| 作者 | W. M. Yin ; V. Lupinc ; L. Battezzati |
| 刊名 | Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing
 |
| 出版日期 | 1997 |
| 卷号 | 240页码:713-721 |
| 关键词 | gamma-TiAl microstructure phase transformation tungsten beta phase titanium aluminides phase-stability al |
| ISSN号 | 0921-5093 |
| 中文摘要 | The phase transformations and modulated microstructures in the cast alloy Ti-47Al-2W-0.5Si(at.%) have been studied. It has been shown that microstructure is sensitive to heat treatment and composition. The structure in the alloy heat treated at 1300 degrees C mainly consists of coarse lamellar, fine lamellar, equiaxed gamma grains and beta phase. Homogenizing treatment at 1400 degrees C results in nearly fully-lamellar structure which shows colony-boundary gamma phase grains. The observations showed that small increases in W content result in changes in the amount and morphology of beta phase. For the alloy containing 2.1 at.% W, the beta phase has been observed in three types of morphology: blocky beta phase containing gamma needles and fine silicide particles inside; rod-like beta phase and fine needle-like beta phase. For the alloy variant containing 1.5 at.% W, only a very small amount of rod-like beta phase appeared. Different mechanisms are proposed to explain the occurrence of three types of beta phase, in that W may stabilize it by extending the primary beta phase to lower temperature as well as by yielding new phase zones. A few primary silicide particles have been found in the interdendrite region in the alloys containing more than 0.5 at.% Si, while coherent secondary silicides generally nucleated at the interfaces. (C) 1997 Elsevier Science S.A. |
| 原文出处 | |
| 公开日期 | 2012-04-14 |
| 源URL | [http://ir.imr.ac.cn/handle/321006/38177]  |
| 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 | W. M. Yin,V. Lupinc,L. Battezzati. Microstructure study of a gamma-TiAl based alloy containing W and Si[J]. Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing,1997,240:713-721. |
| APA | W. M. Yin,V. Lupinc,&L. Battezzati.(1997).Microstructure study of a gamma-TiAl based alloy containing W and Si.Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing,240,713-721. |
| MLA | W. M. Yin,et al."Microstructure study of a gamma-TiAl based alloy containing W and Si".Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing 240(1997):713-721. |
入库方式： OAI收割
来源：金属研究所
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