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

Yulin Ju*, Claire Davis, Martin Strangwood

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

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.

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

Keywords

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

ASJC Scopus subject areas

  • General Materials Science
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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