The overview of the formation mechanisms of topologically close-packed phases in Ni-based single crystal superalloys

被引：19
作者：
Cheng, Yuan [1 ]
Zhao, Xinbao [1 ,2 ]
Xia, Wanshun [1 ]
Yue, Quanzhao [1 ]
Gu, Yuefeng [1 ,2 ]
Zhang, Ze [1 ,2 ]
机构：
[1] Zhejiang Univ, Inst Superalloys Sci & Technol, Sch Mat Sci & Engn, Hangzhou 310027, Peoples R China
[2] Zhejiang Univ, Sch Mat Sci & Engn, State Key Lab Silicon & Adv Semicond Mat, Hangzhou 310027, Peoples R China
来源：
MATERIALS & DESIGN | 2024年 / 237卷
基金：
中国国家自然科学基金;
关键词：
TCP phases; Formation mechanism; Mechanical properties; Ni-based single crystal superalloys; NICKEL-BASED SUPERALLOYS; TERM THERMAL EXPOSURE; MU-PHASE; MICROSTRUCTURAL STABILITY; PRECIPITATION BEHAVIOR; TCP PHASE; P-PHASE; CREEP-PROPERTIES; SIGMA-PHASE; AS-CAST;
D O I：
10.1016/j.matdes.2023.112582
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The nucleation and growth of topologically close-packed (TCP) phases in Ni-based single crystal superalloys (SCs) are controlled by composition, temperature, time, interface structure and stress. The formation of TCP phases causes detrimental effects on the mechanical properties of SCs. Therefore, it is crucial to study the formation mechanism and control factors of TCP phases to develop new-generation Ni-based SCs. Different alloying elements influence the TCP phase nucleation by adjusting the chemical driving force. The interface structure determined by interface energy and strain energy mainly affects the growth mechanism and morphology of the TCP phase. Various temperature determines the driving force for TCP nucleation and diffusion rates of elements during TCP phase growth. Holding time is also crucial to the growth and evolution of TCP phases. Applied stress also has an impact on the precipitation of TCP phases. Evolution between different types of TCP phases depends on the temperature, composition and crystal structure of TCP phases. TCP phases damage the mechanical properties mainly by causing stress concentration and weak interface strength. The review aims to establish a link among TCP phase formation, alloy design and microstructure from the macroscopic view to the microscopic view, providing some perspectives for future research.
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页数：17
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