溶接学会論文集
Print ISSN : 0288-4771
δフェライト共存下でのオーステナイト系ステンレス鋼溶接金属の鋭敏化挙動のフェーズフィールドシミュレーション
-オーステナイト系ステンレス鋼溶接金属の鋭敏化挙動のモデル化-
関 彰小川 和博寺岡 慎一相良 雅之
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2018 年 36 巻 4 号 p. 213-218

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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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