Abstract
The microstructure evolution of nickel-based superalloys has a great influence on the mechanical behavior during service conditions. Microstructure modification and the effect of process variables such as forging temperature, die-speed, and tool heating were evaluated after hot die forging of a heat-resistant nickel-based alloy. Forging sequences in a temperature range from 1253 to 1323 K were considered through experimental trials. An Avrami model was applied using finite element data to evaluate the average grain size and recrystallization at different evolution zones. It was observed that sequential forging at final temperatures below 1273 K provided greater grain refinement through time-dependent recrystallization phenomena. This investigation was aim to explore the influence of forging parameters on grain size evolution in order to design a fully homogenous and refined microstructure after hot die forging.
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The authors acknowledge the financial support provided by the Consejo Nacional de Ciencia y Tecnología CONACYT, Mexico. A special recognition goes to FRISA Forjados S.A. de C.V. for the facilities for carrying out this project.
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Reyes, L.A., Páramo, P., Salas Zamarripa, A. et al. Influence of Processing Parameters on Grain Size Evolution of a Forged Superalloy. J. of Materi Eng and Perform 25, 179–187 (2016). https://doi.org/10.1007/s11665-015-1828-z
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DOI: https://doi.org/10.1007/s11665-015-1828-z