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- W4206539323 abstract "The creep behaviour of Ni-base superalloy 690 has been studied in the temperature range of 800–1000 °C, and stress range of 25–105 MPa under constant load creep conditions. The alloy follows a power-law creep behaviour in the tested conditions and obeys a Monkman-Grant relationship. All the creep data points lay within a ±5% scatter band of the Larson-Miller parameter vs. log stress plot. The alloy spent more than 50% of its life in the tertiary regime and failed predominantly by cavitation. Creep parameters, like apparent activation energy and stress exponent, were relatively high (∼363–498 kJ/mol and 5.5–7, respectively). A high value of the apparent activation energy has been attributed to the resistance of fine carbide particles that form during creep. The microstructural sub-structure of creep deformed samples shows subgrains separated by low angle grain boundaries and randomly oriented dislocations suggesting dislocation climb as the rate-controlling creep mechanism." @default.
- W4206539323 created "2022-01-25" @default.
- W4206539323 creator A5058334991 @default.
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- W4206539323 date "2022-03-01" @default.
- W4206539323 modified "2023-10-14" @default.
- W4206539323 title "Creep behaviour of alloy 690 in the temperature range 800–1000 °C" @default.
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- W4206539323 doi "https://doi.org/10.1016/j.jmrt.2022.01.060" @default.
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