Directional coarsening of gamma ' phase in single crystal nickel based superalloys during tensile creep
文献类型：期刊论文
| 作者 | S. G. Tian ; H. H. Zhou ; J. H. Zhang ; H. C. Yang ; Y. B. Xu ; Z. Q. Hu |
| 刊名 | Materials Science and Technology
 |
| 出版日期 | 2000 |
| 卷号 | 16期号:4页码:451-456 |
| 关键词 | super-alloy uniaxial stress shape changes parameters morphology apparent |
| ISSN号 | 0267-0836 |
| 中文摘要 | The gamma' precipitate rafting kinetics and morphological evolution for two model single crystal superalloys have been studied. The microstructure of the alloys after different stages of tensile creep at 1040 degrees C and under a range of stresses are examined using TEM and SEM, The chemical compositions of both gamma and gamma' phases are analysed by energy dispersive spectrometry. Results show that a meshlike gamma' raft structure is formed along the direction normal to the stress axis during primary creep. The applied stress causes a decrease in the coherent strain energy at the gamma'/gamma interfaces in the (001) crystal plane. The released energy is the driving force for the diffusion of elements, leading to the formation of the gamma' rafts. A longer time is required for the formation of gamma' rafts in alloy 2 owing to its higher content of the refractory element W which obstructs the migration of the other elements in the diffusion field of the gamma' rafts. |
| 原文出处 | |
| 公开日期 | 2012-04-14 |
| 源URL | [http://ir.imr.ac.cn/handle/321006/37175]  |
| 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 | S. G. Tian,H. H. Zhou,J. H. Zhang,et al. Directional coarsening of gamma ' phase in single crystal nickel based superalloys during tensile creep[J]. Materials Science and Technology,2000,16(4):451-456. |
| APA | S. G. Tian,H. H. Zhou,J. H. Zhang,H. C. Yang,Y. B. Xu,&Z. Q. Hu.(2000).Directional coarsening of gamma ' phase in single crystal nickel based superalloys during tensile creep.Materials Science and Technology,16(4),451-456. |
| MLA | S. G. Tian,et al."Directional coarsening of gamma ' phase in single crystal nickel based superalloys during tensile creep".Materials Science and Technology 16.4(2000):451-456. |
入库方式： OAI收割
来源：金属研究所
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