Processing Maps for Hot Working Behavior of a PM TiAl Alloy
文献类型：期刊论文
| 作者 | G. Wang ; L. Xu ; Y. Wang ; Z. Zheng ; Y. Y. Cui ; R. Yang |
| 刊名 | Journal of Materials Science & Technology
 |
| 出版日期 | 2011 |
| 卷号 | 27期号:10页码:893-898 |
| 关键词 | Titanium aluminide Powder metallurgy Hot deformation behavior Processing map Dynamic recrystallization gamma-titanium aluminide static recrystallization superplastic behavior grain-size deformation |
| ISSN号 | 1005-0302 |
| 中文摘要 | The hot deformation behavior of a Ti-47Al-2Cr-2Nb-0.2W-0.15B (at.%) titanium aluminide alloy fabricated by pre-alloyed powder metallurgy has been investigated by using the hot compression tests in the temperature range from 950 degrees C to 1300 degrees C and at the strain rates between 10(-3) s(-1) and 10 s(-1). The processing maps have been established to evaluate the optimum hot processing conditions and reveal the instability regions. It is found that the flow stress of the investigated alloy is a strong function of the temperature and the strain rate. The investigated alloy has the optimum hot-working condition at 950 degrees C and 10(-3) s(-1), since the material undergoes dynamic recrystallization to produce a fine-grained microstructure. At 1250 degrees C and 10(-3) s(-1), the alloy exhibits superplastic deformation. At 1300 degrees C and 10(-1) s(-1), the cyclic dynamic recrystallization with high temperature grain coarsening takes place. The material undergoes flow instabilities at lower temperatures and higher strain rates, as predicted by the instability criterion. The processing maps demonstrate that the strain significantly affected the instability regions. The manifestations of the instabilities have been observed in the form of microvoids, wedge cracks, and surface fractures. |
| 原文出处 | |
| 公开日期 | 2012-04-13 |
| 源URL | [http://210.72.142.130/handle/321006/30720]  |
| 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. Wang,L. Xu,Y. Wang,et al. Processing Maps for Hot Working Behavior of a PM TiAl Alloy[J]. Journal of Materials Science & Technology,2011,27(10):893-898. |
| APA | G. Wang,L. Xu,Y. Wang,Z. Zheng,Y. Y. Cui,&R. Yang.(2011).Processing Maps for Hot Working Behavior of a PM TiAl Alloy.Journal of Materials Science & Technology,27(10),893-898. |
| MLA | G. Wang,et al."Processing Maps for Hot Working Behavior of a PM TiAl Alloy".Journal of Materials Science & Technology 27.10(2011):893-898. |
入库方式： OAI收割
来源：金属研究所
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