Dislocation structures in single crystal nickel- and cobalt-based superalloys under tensile and fatigue loading
文献类型：期刊论文
| 作者 | Z. G. Wang ; Y. B. Xu |
| 刊名 | Defect and Diffusion Forum
 |
| 出版日期 | 1997 |
| 卷号 | 152页码:40925 |
| 关键词 | single crystal superalloy fatigue loading dislocation gamma' precipitate dislocation-free zone stacking fault energy elevated-temperature creep behavior alloy |
| ISSN号 | 1012-0386 |
| 中文摘要 | Dislocation structures in monocrystalline nickel-based superalloys DD8, ZS26 and a directionally solidified cobalt-based superalloy under tensile and fatigue loading are reviewed. An investigation of dislocation structure in DD8 during fatigue loading at 760 degrees C was conducted. Dislocation bands and three-dimensional networks were found in the matrix, Most of the dislocations observed in the gamma'-phase were in the form of superdislocations. The superimposition of the cyclic component to the process of creep resulted in a minor effect on lifetime of single crystal nickel-based superalloy ZS26. Transmission electron microscopy (TEM) reveals different mechanisms of dislocation-gamma' precipitate interaction under various loading conditions. In addition, TEM in-situ investigation of dislocation behaviour at the crack tip in single crystal nickel-based superalloy DD8 was carried out. Dislocation free zone (DFZ) ahead of the crack tip was frequently observed and affected by the nearby gamma/gamma' interfaces. The defects induced by cyclic straining in the single crystal cobalt-based superalloy are mainly characterized by stacking faults and their intersections. |
| 原文出处 | |
| 公开日期 | 2012-04-14 |
| 源URL | [http://ir.imr.ac.cn/handle/321006/38139]  |
| 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 | Z. G. Wang,Y. B. Xu. Dislocation structures in single crystal nickel- and cobalt-based superalloys under tensile and fatigue loading[J]. Defect and Diffusion Forum,1997,152:40925. |
| APA | Z. G. Wang,&Y. B. Xu.(1997).Dislocation structures in single crystal nickel- and cobalt-based superalloys under tensile and fatigue loading.Defect and Diffusion Forum,152,40925. |
| MLA | Z. G. Wang,et al."Dislocation structures in single crystal nickel- and cobalt-based superalloys under tensile and fatigue loading".Defect and Diffusion Forum 152(1997):40925. |
入库方式： OAI收割
来源：金属研究所
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