Precipitation of chromium nitride nano-rods on lamellar carbides along austenite-ferrite boundaries in super duplex stainless steel

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• 作者：X.Z. Liang^a ; M.F. Dodge^b ; W. Liang^c ; H.B. Dong^a ; ^{h.dong@le.ac.uk" class="auth_mail" title="E-mail the corresponding author}
• 关键词：Stainless steel ; Isothermal heat treatment ; Phase boundary structure ; Carbides ; Nitrides
• 刊名：Scripta Materialia
• 出版年：2017
• 出版时间：15 January 2017
• 年：2017
• 卷：127
• 期：Complete
• 页码：45-48
• 全文大小：1105 K

文摘

In super duplex stainless steel, austenite-ferrite boundaries are preferential sites for the precipitation of chromium nitride (Cr₂N) during heat treatment. In this study, we observed a large number of Cr₂N rods were continuously lined up on a thin lamella of M₂₃C₆ of 20 nm width along an austenite-ferrite boundary. This observation indicates that M₂₃C₆ carbides at the boundary play a significant role in promoting the formation of Cr₂N rods.