Microstructural Degradation and Creep Property Damage of a Second-Generation Single Crystal Superalloy Caused by High Temperature Overheating

被引：6
作者：
Guo, Xiaotong [1 ,2 ]
He, Hao [1 ]
Chen, Fangzhou [2 ]
Liu, Jiahao [2 ]
Li, Wendao [3 ]
Zhao, Hao [2 ]
机构：
[1] Chongqing CEPREI Ind Technol Res Inst Co Ltd, Chongqing 401332, Peoples R China
[2] China Elect Prod Reliabil & Environm Testing Res I, Guangzhou 511370, Peoples R China
[3] Xiangtan Univ, Sch Mat Sci & Engn, Xiangtan 411105, Peoples R China
来源：
MATERIALS | 2023年 / 16卷 / 04期
关键词：
superalloy; overheating; creep property; microstructure; UDIMET; 500; MECHANISMS;
D O I：
10.3390/ma16041682
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Nickel base superalloys are widely used to manufacture turbine blades, and overheating poses a serious threat to the safe service of turbine blades. In this study, a second-generation nickel base single crystal superalloy was taken as the research object, and we carried out the overheating treatment at 1100 degrees C and 1300 degrees C, and then tested the creep properties at 1000 degrees C/300 MPa and 1100 degrees C/130 MPa. Through systematic analysis of creep properties, gamma/gamma' phases, and creep voids, the effects of overheating on the microstructures and creep properties of the experimental superalloy were revealed. The results demonstrate that the effect of overheating at 1100 degrees C on the microstructure of the experimental superalloy can be ignored, and the effect on the creep property is limited. The degree of gamma' dissolution is gradually increased and the creep property is reduced with overheating time extending at the overheating temperature of 1300 degrees C.
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页数：11
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