Effect of thermal exposure on stress rupture properties of a Re bearing Ni base single crystal superalloy
文献类型：期刊论文
| 作者 | J. L. Liu ; T. Jin ; J. J. Yu ; X. F. Sun ; H. R. Guan ; Z. Q. Hu |
| 刊名 | Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing
 |
| 出版日期 | 2010 |
| 卷号 | 527期号:4-5页码:890-897 |
| 关键词 | Single crystal superalloy Thermal exposure Stress rupture Microstructure carbon additions creep-properties sx-superalloys microstructure behavior deformation rr2072 phase |
| ISSN号 | 0921-5093 |
| 中文摘要 | The effect of thermal exposure on microstructure and creep properties of a Re bearing single crystal superalloy is investigated. The alloy is exposed at 950 degrees C for 100-2000h. The coarsening behavior of gamma' varies with local position. The gamma' particles in dendrite core and interior secondary arm form raft when aged longer than 100h. The gamma' in periphery of secondary arm can retain cuboidal morphology aged to 2000h in addition to normal growth. The gamma' in interdendrite region develops into irregular raft. The various behavior of gamma' is attributed to the segregation of refractory elements. The MC carbide demonstrates high stability even though it begins to decompose to M(6)C after 500 h exposure. This is explained from its high contents of Ta and Nb. mu phase precipitates in both dendrite core and interdendrite region when aged more than 100 h, but the mu phase in these two areas have different morphologies, which is attributed to their unique nucleation site and orientation relationship with matrix. The creep lives of exposed samples at 1000 degrees C/280 MPa decrease with increasing of aging time generally, especially, the life of 500 h aged sample drops lower than that of 1000 h aged sample. The degradation of creep life is accounted for based on coarsening of gamma' and deposition of dislocation during thermal exposure. (C) 2009 Elsevier B.V. All rights reserved. |
| 原文出处 | |
| 公开日期 | 2012-04-13 |
| 源URL | [http://210.72.142.130/handle/321006/31295]  |
| 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 | J. L. Liu,T. Jin,J. J. Yu,et al. Effect of thermal exposure on stress rupture properties of a Re bearing Ni base single crystal superalloy[J]. Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing,2010,527(4-5):890-897. |
| APA | J. L. Liu,T. Jin,J. J. Yu,X. F. Sun,H. R. Guan,&Z. Q. Hu.(2010).Effect of thermal exposure on stress rupture properties of a Re bearing Ni base single crystal superalloy.Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing,527(4-5),890-897. |
| MLA | J. L. Liu,et al."Effect of thermal exposure on stress rupture properties of a Re bearing Ni base single crystal superalloy".Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing 527.4-5(2010):890-897. |
入库方式： OAI收割
来源：金属研究所
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