粉末冶金技术2011，Vol.29Issue(4)：263-268,6.
固溶温度对粉末镍基高温合金组织与蠕变行为的影响
Influence of solution temperature on microstructure and creep behaviors of powder nickel-based superalloy
谢君 1田素贵 1周晓明 2李柏松1
作者信息
- 1. 沈阳工业大学材料科学与工程学院,沈阳110870
- 2. 北京航空材料研究院,北京100095
- 折叠
摘要
Abstract
By means of the measurement of creep properties and the microstructure observation, the influence of solution temperature on microstructure and creep behaviors of FCH9S nickel base superalloy was investigated. Results show that, after hot isostatic pressing, the microstructure of the alloy mainly consists of 7' phase with different size and y matrix. After 1150℃ solution treatment and oil cooling treatment, coarser y' phase is discontinuously distributed in the previous particle boundaries regions in which exists the depleted zone of the finer y' phase. With the temperature enhancing to 1160℃ , the amount and sizes of the thicker y' phase decrease obviously in the alloy, and the fine y' phase dispersedly precipitates in the grain. Moreover, the carbide particles discontinuously precipitate in the grain and along the grain boundaries, which improve the strength of grain and the boundaries to cause the alloy possessing the longer creep lifetime of the alloy under the applied stress 1034MPa at 650℃ . During creep, the deformation feature of the lower temperature solution treated alloy is that the double orientation slipping of dislocations are activated. After high temperature solution treatment and oil cooling, the deformation features of the alloy are the formation of the dislocation tangles, stacking fault and micro-twinning.关键词
FGH95镍基合金/固溶处理/组织/蠕变/变形特征Key words
FGH95 Ni-base superalloy/ solution treatment/ microstructure/ creep/ deformed feature引用本文复制引用
谢君,田素贵,周晓明,李柏松..固溶温度对粉末镍基高温合金组织与蠕变行为的影响[J].粉末冶金技术,2011,29(4):263-268,6.
