| Weakening Mechanisms of Platelike σ Phase on Ni-base Superalloys |
| |
| 引用本文： | 刘跃生,赵先国,刘志中,谢锡善.Weakening Mechanisms of Platelike σ Phase on Ni-base Superalloys[J].材料科学技术学报,1990,6(5):319-324. |
| |
| 作者姓名： | 刘跃生 赵先国 刘志中 谢锡善 |
| |
| 作者单位： | Beijing Institute of Aeronautical Materials 100095，China.To whom correspondence should be addressed.，Beijing Institute of Aeronautical Materials，100095，China.，Beijing Institute of Aeronautical Materials，100095，China.，University of Science and Technology Beijing，100083，China. |
| |
| 摘 要： | On the basis of an investigation on σ phase inNi-base cast superalloy K24 and the results aboutσ phase in other Ni-base superalloys,an embrittl-ing mechanism and a softening mechanism,bywhich platelike σ phase weakens the Ni-basesuperalloys,have been proposed.It is consideredthat the platelike morphology and the habit precipi-tation along{111}of σ phase are necessary condi-tions for both mechanisms.The embrittling mecha-nism is dominant at room temperature and highstrain rate,and the softening mechanism is domi-nant at high temperature and low strain rate.Ac-cording to the idea of the softening mechanism andthe analyses of σ phase and alloy compositions,it isconsidered that Nb,Mo and W in the alloys may beresistant to the detrimental effect of σ phase on thestress-rupture properties of the alloys.
|
| 关 键 词： | Ni-base superalloys σ-phase weakening mechanism |
| 收稿时间： | 1990-09-28 |
Weakening Mechanisms of Platelike σ Phase on Ni-base Superalloys |
| |
| LIU Yuesheng ZHAO Xianguo LIU Zhizhong XIE Xishan Beijing Institute of Aeronautical Materials,China. University of Science and Technology Beijing,China.To whom correspondence should be addressed..Weakening Mechanisms of Platelike σ Phase on Ni-base Superalloys[J].Journal of Materials Science & Technology,1990,6(5):319-324. |
| |
| Authors: | LIU Yuesheng ZHAO Xianguo LIU Zhizhong XIE Xishan Beijing Institute of Aeronautical Materials China University of Science and Technology Beijing ChinaTo whom correspondence should be addressed |
| |
| Abstract: | On the basis of an investigation on σ phase in Ni-base cast superalloy K24 and the results about σ phase in other Ni-base superalloys,an embrittl- ing mechanism and a softening mechanism,by which platelike σ phase weakens the Ni-base superalloys,have been proposed.It is considered that the platelike morphology and the habit precipi- tation along{111}of σ phase are necessary condi- tions for both mechanisms.The embrittling mecha- nism is dominant at room temperature and high strain rate,and the softening mechanism is domi- nant at high temperature and low strain rate.Ac- cording to the idea of the softening mechanism and the analyses of σ phase and alloy compositions,it is considered that Nb,Mo and W in the alloys may be resistant to the detrimental effect of σ phase on the stress-rupture properties of the alloys. |
| |
| Keywords: | Ni-base superalloys σ-phase weakening mechanism |
| 本文献已被 CNKI 等数据库收录！ |
| 点击此处可从《材料科学技术学报》浏览原始摘要信息 |
|
点击此处可从《材料科学技术学报》下载全文 |
