QUARTERLY JOURNAL OF THE JAPAN WELDING SOCIETY
Print ISSN : 0288-4771
Phase-field simulation of sensitization behavior in austenitic stainless steel weld metal with delta-ferrite existence
Akira SEKIKazuhiro OGAWAShin-ichi TERAOKAMasayuki SAGARA
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2018 Volume 36 Issue 4 Pages 213-218

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Abstract

The sensitization behavior in austenitic stainless steel weld metal was simulated using the phase-field method. The simulations were performed for two cases that δ-ferrite does and does not exist in austenitic phase. The calculation results revealed that the Cr-depleted zones do not form both in the vicinity of γ/M23C6 and δ/M23C6 when δ-ferrite exists. On the other hand the Cr-depleted zones form in the interface of γ/M23C6 in the austenitic stainless steel when δ-ferrite dose not exist. The suppression of the formation of Cr-depleted zone can be explained by the model that carbon atoms in the austenitic phase are consumed due to rapid growth of M23C6 in δ-ferrite.

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© 2018 by JAPAN WELDING SOCIETY
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