The site occupancies of alloying elements in TiAl and Ti3Al alloys
文献类型：期刊论文
| 作者 | Y. L. Hao ; D. S. Xu ; Y. Y. Cui ; R. Yang ; D. Li |
| 刊名 | Acta Materialia
 |
| 出版日期 | 1999 |
| 卷号 | 47期号:4页码:1129-1139 |
| 关键词 | electron-channeling analysis substitution behavior ternary additions base alloys alchemi atoms diffraction location compound zone |
| ISSN号 | 1359-6454 |
| 中文摘要 | The site occupancies of V, Cr, Mn, Fe, Ni, Zr, Nb, Mo, Ta, Ga and Sn (1-5 at.%) in TiAl alloys with different compositions, and in Ti3Al with the compositions of Ti-26 at.%Al-(1-2 at.%)X, were measured by the atom location channelling enhanced microanalysis (ALCHEMI) method. For TiAl alloys, the results show that Zr, Nb and Ta atoms invariably occupy Ti sites, while Fe, Ni, Ga and Sn atoms occupy Al sites, the alloy composition having no significant influence on their site preference. By contrast, the site preference of V, Cr, and Mn changes considerably with alloy composition (the Ti/Al ratio in particular), the probability of these elements substituting for Ti decreasing in the above order. For quaternary Ti-Al-V-Cr alloys, the site occupancies of V and Cr do not show much mutual influence. In general, with increasing atomic number, elements in the same period show increasing tendency to substitute for Al, as is the tendency to substitute for Ti for elements in the same group of the periodic table. For Ti3Al alloys, Ga and Sn atoms occupy Al sites, while V, Cr, Mn, Zr, Nb, Mo and Ta atoms occupy Ti sites, the site preference of V, Cr, Mn and Mo in TiAl alloys being different from that in Ti3Al. The experimental results are interpreted in terms of a Bragg-Williams-type model and bond-order data obtained from electronic structure calculation. Qualitative agreement between the model and measurements is reached. (C) 1999 Acta Metallurgica Inc. Published by 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/321006/37364]  |
| 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 | Y. L. Hao,D. S. Xu,Y. Y. Cui,et al. The site occupancies of alloying elements in TiAl and Ti3Al alloys[J]. Acta Materialia,1999,47(4):1129-1139. |
| APA | Y. L. Hao,D. S. Xu,Y. Y. Cui,R. Yang,&D. Li.(1999).The site occupancies of alloying elements in TiAl and Ti3Al alloys.Acta Materialia,47(4),1129-1139. |
| MLA | Y. L. Hao,et al."The site occupancies of alloying elements in TiAl and Ti3Al alloys".Acta Materialia 47.4(1999):1129-1139. |
入库方式： OAI收割
来源：金属研究所
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