Austenite Grain Growth Simulation in Welding Heat-Affected Zone

Abstract:

To predict austenite grain growth behavior in the heat-affected zone (HAZ) in low alloy steels, a new calculation model is proposed herein. This model mainly considers the solute-drag effect and pinning effect, which restrain the austenite grain growth. To calculate the solute-drag effect, the grain boundary concentration of each element is obtained by Hillert’s Law. Calculations are performed by simulating the HAZ with a temperature gradient using the phase field method for two dimensions. This calculation demonstrates the possibility of quantitatively predicting the pinning force for welding heat inputs.

• Periodical: Materials Science Forum (Volume 941)
• Pages: 620-626
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.941.620
• Online since: December 2018
• Authors: Naoto Fujiyama*, Akira Seki
• Keywords: Austenite Grain Growth, HAZ, Phase Field Method, Pinning Effect, Solute-Drag Effect

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