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- W4367599205 abstract "Effects of an artificial aging treatment at 1000 °C up to 3000 h on microstructural evolution and mechanical properties of a GTD-111 superalloy have been investigated. Resulting microstructures were analyzed using scanning electron microscopy and energy dispersive x-ray spectroscopy. During the artificial aging treatment, γ’ precipitates coarsened following LSW theory, volume fraction of intragranular γ’ was constant at approximately 33.2% and hardness decreased from 435 to 332 (HV10). Activation energy calculated for γ’ coarsening was 258 kJ/mol. Thermal exposure induced changes in microstructure: morphology of primary γ’ precipitates transformed from cubic to spherical, MC carbides decomposed and a continuous γ’ film formed along the grain boundary. The influence of thermal exposure on the high temperature mechanical behavior of GTD-111 has been studied by hot tensile tests at 900 °C. Changes in ultimate tensile strength and yield strength were relatively small, but high temperature ductility of thermally exposed specimens decreased noticeably due to grain boundary embrittlement." @default.
- W4367599205 created "2023-05-02" @default.
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- W4367599205 date "2023-07-01" @default.
- W4367599205 modified "2023-09-26" @default.
- W4367599205 title "Effects of a high temperature artificial aging on microstructure and mechanical properties of the Ni-base superalloy GTD-111" @default.
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- W4367599205 doi "https://doi.org/10.1016/j.matchar.2023.112966" @default.
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