Surface recrystallisation and oxidation of polycrystalline superalloy castings during isothermal exposure at 1100 degrees C
文献类型：期刊论文
| 作者 | W. G. Jiang ; M. C. Yang ; L. H. Lou ; Z. Q. Hu |
| 刊名 | International Journal of Cast Metals Research
 |
| 出版日期 | 2012 |
| 卷号 | 25期号:4页码:195-200 |
| 关键词 | Superalloy Investment casting Modulus Recrystallisation Residual stress Oxidation ni-base superalloy gas-turbine blade heat-treatment dynamic recrystallization leading-edge water-vapor microstructure behavior 900-degrees-c evolution |
| ISSN号 | 1364-0461 |
| 中文摘要 | The surface recrystallisation and oxidation of polycrystalline superalloy castings with different casting moduli were studied. Specimens exposed at 1100 degrees C for 2 h in hydrogen, and at 1100 degrees C for 2, 20 and 60 h in air were examined by optical and scanning electron microscopy and energy dispersive spectroscopy. No surface recrystallisation was observed on the surfaces of heavy section castings with moduli of 2.8 or 5.2 mm after exposure at 1100 degrees C, and the oxidation scale was only 50 mu m in thickness after exposure in air for 60 h. Surface recrystallisation was observed in the thin wall casting of 0.28 mm modulus; recrystallisation produced higher oxidation rates, owing to enhanced diffusion, and the oxidation scale thickness was 120 mu m after 60 h. The mechanism of surface recrystallisation and its effect in accelerating surface oxidation are discussed. |
| 原文出处 | |
| 公开日期 | 2013-02-05 |
| 源URL | [http://ir.imr.ac.cn/handle/321006/60025]  |
| 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. G. Jiang,M. C. Yang,L. H. Lou,et al. Surface recrystallisation and oxidation of polycrystalline superalloy castings during isothermal exposure at 1100 degrees C[J]. International Journal of Cast Metals Research,2012,25(4):195-200. |
| APA | W. G. Jiang,M. C. Yang,L. H. Lou,&Z. Q. Hu.(2012).Surface recrystallisation and oxidation of polycrystalline superalloy castings during isothermal exposure at 1100 degrees C.International Journal of Cast Metals Research,25(4),195-200. |
| MLA | W. G. Jiang,et al."Surface recrystallisation and oxidation of polycrystalline superalloy castings during isothermal exposure at 1100 degrees C".International Journal of Cast Metals Research 25.4(2012):195-200. |
入库方式： OAI收割
来源：金属研究所
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