Flow behavior and microstructure evolution of a P/M TiAl alloy during high temperature deformation
文献类型：期刊论文
| 作者 | G. Wang ; L. Xu ; Y. X. Tian ; Z. Zheng ; Y. Y. Cui ; R. Yang |
| 刊名 | Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing
 |
| 出版日期 | 2011 |
| 卷号 | 528期号:22-23页码:6754-6763 |
| 关键词 | Titanium aluminide Powder metallurgy Hot deformation behavior Dynamic recrystallization dynamic recrystallization hot deformation submicrocrystalline structure aluminide alloys intermetallics prediction working creep steel twin |
| ISSN号 | 0921-5093 |
| 中文摘要 | Hot compression tests of a P/M Ti-47Al-2Cr-2Nb-0.2W-0.15B (at. pct) alloy were carried out on a Gleeble-3800 simulator at the temperatures ranging from 950 degrees C to 1250 degrees C with the strain rates ranging from 10 s(-1) to 10(-3) s(-1). Optical microscope, electron backscatter diffraction technique, and transmission electron microscope were employed to investigate the microstructure evolution and nucleation mechanisms of dynamic recrystallization. It was found that the flow behavior is a function of the deformation temperature and strain rate. The dependence of the peak stress on the deformation temperature and strain rate can be expressed by a hyperbolic-sine type equation. The activation energy for the alloy is calculated to be 315 kJ/mol. The size of the dynamically recrystallized grains decreased with increasing the value of parameter Z. However, the size of dynamically recrystallized grains almost remains constant with increasing deformation strain. At the early stage the dominant nucleation mechanism of dynamic recrystallization in the alloy is the discontinuous dynamic recrystallization, which is characterized by the bulging of the original grain boundaries and the deformation twinning. As the deformation strain increased, the continuous dynamic recrystallization characterized by progressive subgrain rotation occurred. Twinning was observed under all deformation conditions. The spheroidization of the alpha(2) took place at the compression temperature 950 degrees C and the strain rate 10(-3) s(-1). (C) 2011 Elsevier B.V. All rights reserved. |
| 原文出处 | |
| 公开日期 | 2012-04-13 |
| 源URL | [http://ir.imr.ac.cn/handle/321006/30719]  |
| 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. X. Tian,et al. Flow behavior and microstructure evolution of a P/M TiAl alloy during high temperature deformation[J]. Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing,2011,528(22-23):6754-6763. |
| APA | G. Wang,L. Xu,Y. X. Tian,Z. Zheng,Y. Y. Cui,&R. Yang.(2011).Flow behavior and microstructure evolution of a P/M TiAl alloy during high temperature deformation.Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing,528(22-23),6754-6763. |
| MLA | G. Wang,et al."Flow behavior and microstructure evolution of a P/M TiAl alloy during high temperature deformation".Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing 528.22-23(2011):6754-6763. |
入库方式： OAI收割
来源：金属研究所
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