Abstract
In order to study the hot workability and to optimize the processing parameters for spray formed FGH4095 superalloy, thermal compression tests for spray formed FGH4095 superalloy have been finished by using a Gleeble 1500 thermal simulated test machine at the strain rates of 0.01–10.0s−1 and temperatures of 1050–1140 °C. The effects of strain rate and deformation temperature on the true stress-true strain curves and microstructure evolution were investigated. The results show that the generation of dynamic recrystallization (DRX) depends sensitively on deformation temperature. When the temperature was lower than 1080 °C, long and narrow necklace grains were shown in the microstructure. When the temperature increased to 1140 °C, new recrystallization grains were generated. The size and shape of γ’ precipitates in the grains have a very important effect as factors of hindering sufficient migration of dislocations on plastic deformation. The result of thermal processing map is in accord with the micro-structure observation, and the best material thermal processing temperature is above 1128 °C.
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Foundation Item: Item Sponsored by National Natural Science Foundation of China (50974016)
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Xu, Y., Shu, Q., Guo, B. et al. Microstructural Characterization of Spray Formed FGH4095 Superalloy During Hot Deformation. J. Iron Steel Res. Int. 20, 57–62 (2013). https://doi.org/10.1016/S1006-706X(13)60127-2
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DOI: https://doi.org/10.1016/S1006-706X(13)60127-2