Three-dimensional finite-element analysis of the quenching process of plain-carbon steel with phase transformation |
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Authors: | Seong-Hoon Kang Yong-Taek Im |
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Affiliation: | (1) the Computer Aided Materials Processing Laboratory, Department of Mechanical Engineering, ME3227, Korea Advanced Institute of Science and Technology, 305-701 Daejeon, Korea |
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Abstract: | In this study, three-dimensional finite-element (FE) analyses were carried out to predict the volume fractions of various
phases generated during the quenching process of plain-carbon steel and the temperature history, considering the latent heat
generated due to phase transformation. Diffusional phase transformation for a nonisothermal process was described by discretizing
the cooling curve into various small isothermal steps and using a time-temperature-transformation (TTT) diagram for carbon
steel. For this, Sheil’s additive rule was adopted to predict the incubation time which indicates the onset of phase nucleation,
and, also, the Johnson-Mehl-Avrami-Kolmogorov (JMAK) equation was used to model the phase growth. For handling diffusionless
transformation, Koistinen and Marburger’s equation was employed to model the austenite-martensite transformation during the
rapid quenching process. Finally, temperature variations obtained from the FE simulation were compared to the experimental
data available in the literature to validate the reliability of the numerical solution, and its application was made to simulate
the three-dimensional forming process of a bevel gear and cam lobe. |
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Keywords: | |
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