Finite element modeling of transient heat transfer and microstructural evolution in welds: Part II. Modeling of grain growth in austenitic stainless steels |
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| Authors: | S E Chidiac D S Wilkinson F A Mirza |
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| Affiliation: | (1) Structures Laboratory, Institute for Research in Construction, National Research Council CanActa, K1A 0R6 Ottawa, ON, Canada;(2) Department of Materials Science and Engineering, McMaster University, L8S 4L7 Hamilton, ON, Canada;(3) Department of Civil Engineering and Engineering Mechanics, McMaster University, L8S 4L7 Hamilton, ON, Canada |
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| Abstract: | During welding, structures are subjected to localized heating and cooling cycles, as described in Part I.1] A mathematical
model is proposed to determine the metallurgical changes that occur in austenitic stainless steel due to the welding thermal
cycle. The proposed kinetic model computes the austenite grain growth as a function of time and temperature. It is based on
a Zener pinning grain growth model. The results obtained indicate that the model is in good agreement with the experimental
data reported in the literature. Furthermore, it was observed that rewriting the kinetic constant in the grain growth equation
as a function of the peak temperature led to improved results for the majority of the cases examined. |
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