Nonequilibrium alpha(2)/gamma interfacial structures in a gamma-TiAl based two phase alloy after hot-working and annealing
文献类型：期刊论文
| 作者 | L. C. Zhang ; G. L. Chen ; J. G. Wang ; H. Q. Ye |
| 刊名 | Intermetallics
 |
| 出版日期 | 1997 |
| 卷号 | 5期号:4页码:289-295 |
| 关键词 | titanium aluminides based on TiAl hot forging phase interfaces transmission electron-microscopy titanium aluminide deformation boundaries lamellae |
| ISSN号 | 0966-9795 |
| 中文摘要 | A transmission electron microscope investigation has been performed on the thermal instability of the nonequilibrium alpha(2)/gamma interfacial structure in a hot-forged Ti-45Al-10Nb-2.5Mn-0.05B alloy. The distinctiveness of these nonequilibrium alpha(2)/gamma interfaces in the hot-deformed sample is the misorientation from the conventional orientation relationship {111}(gamma)//{0001}(alpha 2), <1(1) over bar0$>(gamma)//<<11(2)over bar 0>>(alpha 2). The structure of this nonequilibrium interface boundary is characterized by numerous interfacial ledges containing 1/3[111] Frank partial dislocations. The analysis points towards the formation of this type of nonequilibrium alpha(2)/gamma interface being caused by the relative rotation of alpha(2) and gamma plates in the lamellar structure. Further TEM studies of microstructural changes during annealing for 4 min/1000 degrees C of the nonequilibrium alpha(2)/gamma lamellar structure generated by hot-forging revealed that many low-angle grain boundaries are formed in the gamma plates of lamellar colonies, resulting in a gamma subgrain microstructure; necking of alpha(2) plates occurs preferentially at alpha(2) subgrain boundaries; subsequently disintegration of the original alpha(2) plates takes place resulting in spheroidized alpha(2) particles which are aligned at the prior alpha(2)/gamma boundaries. (C) 1997 Published by Elsevier Science Ltd. |
| 原文出处 | |
| 公开日期 | 2012-04-14 |
| 源URL | [http://ir.imr.ac.cn/handle/321006/38207]  |
| 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 | L. C. Zhang,G. L. Chen,J. G. Wang,et al. Nonequilibrium alpha(2)/gamma interfacial structures in a gamma-TiAl based two phase alloy after hot-working and annealing[J]. Intermetallics,1997,5(4):289-295. |
| APA | L. C. Zhang,G. L. Chen,J. G. Wang,&H. Q. Ye.(1997).Nonequilibrium alpha(2)/gamma interfacial structures in a gamma-TiAl based two phase alloy after hot-working and annealing.Intermetallics,5(4),289-295. |
| MLA | L. C. Zhang,et al."Nonequilibrium alpha(2)/gamma interfacial structures in a gamma-TiAl based two phase alloy after hot-working and annealing".Intermetallics 5.4(1997):289-295. |
入库方式： OAI收割
来源：金属研究所
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