Effects of microstructure and lattice misfit on creep life of Ni-based single crystal superalloy during long-term thermal exposure
-
Wenyan Gan
,
Hangshan Gao
Abstract
According to the microstructural evolution during longterm thermal exposure at 1100 °C, the creep rupture life of Ni-based single crystal superalloys at 980 °C/270 MPa was evaluated. The microstructure was characterized by means of scanning electron microscopy, X-ray diffraction and related image processing methods. The size of γ’ precipitates and the precipitation amount of topologically close-packed increased with the increase in thermal exposure time, and coarsening of the γ’ precipitates led to the simultaneous increase of the matrix channel width. The relationship between the creep rupture life and the lattice misfit of γ/γ’, the coarsening of γ’ precipitate and the precipitation of TCP phase are systematically discussed. In addition, according to the correlation between γ’ phase evolution and creep characteristics during thermal exposure, a physical model is established to predict the remaining creep life.
References
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© 2021 Walter de Gruyter GmbH, Berlin/Boston, Germany
Articles in the same Issue
- Contents
- Original Contributions
- Distributions of As, Pb, Sn and Zn as minor elements between iron silicate slag and copper in equilibrium with tridymite in the Cu–Fe–O–Si system
- Short Communications
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- Effect of TiO2 crystal form on the denitration performance of Ce–W–Ti catalyst
- Notifications
- Deutsche Gesellschaft für Materialkunde / German Materials Science Society
Articles in the same Issue
- Contents
- Original Contributions
- Distributions of As, Pb, Sn and Zn as minor elements between iron silicate slag and copper in equilibrium with tridymite in the Cu–Fe–O–Si system
- Short Communications
- Free vibration analysis and selection of composite for high strength and stiffness using multi-attribute decision making
- Metallurgical and wear study of MWCNT-reinforced h-AMMC fabricated through microwave hybrid sintering
- Effects of microstructure and lattice misfit on creep life of Ni-based single crystal superalloy during long-term thermal exposure
- Fracture toughness assessment at different regions in an inertial friction welded Ti-5Al-2Sn-2Zr-4Mo-4Cr alloy plate
- Microstructure and mechanical property improvement of dissimilar metal joints for TC4 Ti alloy to Nitinol NiTi alloy by laser welding
- The influence of gadolinium on Al–Ti–C master alloy and its refining effect on AZ31 magnesium alloy
- Effect of adding rare-earth cerium on the microstructure and acid rain corrosion resistance of the ADC12 alloy
- Effect of TiO2 crystal form on the denitration performance of Ce–W–Ti catalyst
- Notifications
- Deutsche Gesellschaft für Materialkunde / German Materials Science Society
