Simulation of coarsening of inter-lath cementite in a Q&T steel during tempering |
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| Authors: | Yulin Ju Claire Davis Martin Strangwood |
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| Affiliation: | 1. School of Metallurgy and Materials, University of Birmingham, Birmingham, UK;2. School of Materials Science &3. Engineering, Jiangsu University, Zhenjiang, People’s Republic of China juyulin1990@hotmail.com;5. Warwick Manufacturing Group, University of Warwick, Coventry, UK;6. Warwick Manufacturing Group, University of Warwick, Coventry, UK |
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| Abstract: | A mathematical model, using the finite difference approach, was established to consider tempering in a low carbon low alloy quenched and tempered steel based on experimental observations, treating the coarsening of a larger particle and dissolution of a smaller particle as a continuous and simultaneous process for coupled inter-lath cementite systems. The diffusion of Mn was simplified as a 1D diffusion and occurred between the interface elements and their adjacent elements in the model. The mathematical model predicted the shortest dissolution times for smaller particles in coupled inter-lath cementite systems, which agreed well with experimental observations on tempering from 2 to 4?h. However, the larger particle coarsening was under predicted due to the simplification of considering two particle arrangements. |
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| Keywords: | Q& T steel lath martensite inter-lath cementite coarsening dissolution mathematical model finite difference approach |
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