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Theory of modelling the isothermal austenite grain growth in a Si‐Mn TRIP steel
Author(s) -
Jiao Shujun,
Penning Jan,
Leysen Frans,
Houbaert Yvan,
Aernoudt Etienne
Publication year - 2000
Publication title -
steel research
Language(s) - English
Resource type - Journals
eISSN - 1869-344X
pISSN - 0177-4832
DOI - 10.1002/srin.200001326
Subject(s) - isothermal process , austenite , metallurgy , grain growth , grain boundary , thermodynamics , chemistry , materials science , grain size , physics , microstructure
The development of a model to predict the isothermal austenite grain growth during soaking of a low carbon Si‐Mn TRIP steel is described. After reviewing the existing models for isothermal grain growth, a general model d n = d 0 n + K 1 t exp ( K 2 / T ) was selected and a procedure was delineated to calculate the values of the different constants of the equation starting with the real three‐dimensional austenite grain size. This paper also deals with an improved etching technique to reveal the austenite grain boundaries.