江峰
- 教授
- 博士生导师
- 硕士生导师
- 性别：男
- 学历：博士研究生毕业
- 学位：博士
- 所在单位：材料科学与工程学院
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- 学科：材料科学与工程
- 学科：材料科学与工程
吴亚科博士关于镍基783超合金组织和力学性能演化的论文被JAC 录用发表
- 发布时间：2020-08-29
- 文章标题：吴亚科博士关于镍基783超合金组织和力学性能演化的论文被JAC 录用发表
- 内容：
Correlation between evolving microstructures and mechanical
properties of served Inconel 783 superalloysYake Wu a , Jin Tian a , Wei Xiong b ， Peng Zhang c , Feng Jiang a* , Zhibo Zhang c** and JunSun aMicrostructures and mechanical properties of Inconel 783 superalloys, which wereused as ultra-supercritical steam turbine bolts for different time, were systematicallyinvestigated. The results showed that the strength of the superalloys increasedconcomitantly with the service time, while the ductility and impact toughnessexhibited successive degradation. Theoretical calculations regarding variousstrengthening mechanisms demonstrated that the strength increment was mainly dueto the enhanced precipitate strengthening. Moreover, effects of multiscaled phases onthe ductility were successfully analyzed with a modified model, which attributed thereduced ductility to the microscaled phases with high volume fraction. Besides, arelationship correlating the impact toughness with the evolving microstructures andyield strength was examined, which is consistent with the present experimental results,as well as those of other alloys in the literature. The result revealed that the toughnessdegradation was caused by the higher content and/or larger size of the second phase.This work was useful for performance enhancement and evaluation of the Inconel 783superalloy.Keywords: Superalloy; Strengthening mechanism; Microstructure; Ductility;Toughness