Simulation of coarsening of inter-lath cementite in a Q&T steel during tempering

Research output: Contribution to journalArticle

Authors

Colleges, School and Institutes

External organisations

  • School of Materials Science & Engineering
  • Jiangsu University
  • University of Warwick

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.

Details

Original languageEnglish
Pages (from-to)1-17
Number of pages17
JournalMaterials Science and Technology (United Kingdom)
Publication statusPublished - 2020

Keywords

  • coarsening, dissolution, finite difference approach, inter-lath cementite, lath martensite, mathematical model, Q&T steel