Long Time High Temperature Stress Rupture Strength Behavior and Structure Stability Study on Ni-Base Superalloy Nimonic 80A

摘要：

　　Nimonic 80A Ni-base superalloy can be used for high temperature steam turbine components.There is a critical requirement for turbine blade application that the stress rupture strength for 105 hrs at relevant high temperatures should be higher than 100MPa.On the other hand,it must keep good structure stability and no harmful phase such asσ -phase and the TCP phase formation at long time high temperature exposure.Therefore,the long time stress rupture tests at temperatures of 600,650,680 and 700℃ for different stresses have been carried out.The long time structure stability has been also studied in detail.The results show that Nimonic 80A can meet the critical requirement for USC steam turbine blades at 600~700℃.Any detrimental phases have not been found at the long time stress rupture tests.The morphology of grain boundary carbides also has no apparent change.Based on above mentioned results,Nimonic 80A is recommended to be used for USC steam turbine components in the temperature range of 600~650℃.

关键词： Nimonic 80A High temperature stress rupture Structure stability

作者: Xiaofei Chen Zhihao Yao Maicang Zhang Xishan Xie Qiuying Yu Jingjing Song Lifeng Ding Hongwei Shen

作者单位: University of Science and Technology Beijing,Beijing 100083,China Beijing Institute of Aeronautical Materials,Beijing 100095,China Shanghai Electric Power Generation Equipment Co.,Ltd. Turbine Plant,Shanghai 200240,China

会议类型: 国际会议

会议名称: 2016 International Symposium on Structural Integrity，ISSI—2016(2016国际结构完整性研讨会)

会议地点: 天津

会议语种:英文

页码: 148-152

在线出版日期: 2016-05-26（万方平台首次上网日期，不代表论文的发表时间）