Kinetics modeling of delta-ferrite formation and retainment during casting of supermartensitic stainless steel

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• 作者：Frank Niessen^a ; ^{frannie@dtu.dk} ; Niels S. Tiedje^b ; ^{nsti@mek.dtu.dk} ; John Hald^c ; ^{jhald@mek.dtu.dk}
• 关键词：Kinetics modeling ; Delta ferrite ; Solidification ; Casting ; Supermartensitic stainless steel ; Diffusion ; Solid state transformation
• 刊名：Materials & Design
• 出版年：2017
• 出版时间：15 March 2017
• 年：2017
• 卷：118
• 期：Complete
• 页码：138-145
• 全文大小：1351 K
• 卷排序：118

文摘

The transformations during solidification and cooling in casting can be predicted with kinetics modeling of diffusion. The kinetics model can predict the amount of retained δ-ferrite and the partitioning between δ-ferrite and austenite. Micro-segregation from solidification was shown to be homogenized within seconds. Compositional inhomogeneity is caused by the impinged diffusion field of the δ-ferrite to austenite transformation.