Assessment of niobium segregation energy in migrating ferrite/austenite phase interfaces
Assessment of niobium segregation energy in migrating ferrite/austenite phase interfaces
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DOI：
10.3139/146.110413
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发表时间：
2010-10
影响因子：
0.8
通讯作者：
R. Okamoto;J. Ågren
中科院分区：
文献类型：
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作者：
R. Okamoto;J. Ågren
利用Odqvist的溶质阻力模型，重新研究了物理参数对迁移铁素体/奥氏体界面内吉布斯能总耗散的影响。结果表明，铁素体/奥氏体相界面的迁移率和铌在界面中的扩散率对吉布斯能量耗散有较大影响。由于最近对相界面迁移率进行了重新评估，很明显，铌的吉布斯偏析能和铌在界面中的扩散率也必须重新评估。本文采用新的物理参数和超低碳钢的实验结果，在Fe-C-Nb体系中对这两个参数进行了重新评价。
Abstract The effects of physical parameters on the total dissipation of Gibbs energy inside migrating ferrite/austenite interfaces have been re-investigated using Odqvist's solute drag model. It is shown that the mobility of the ferrite/austenite phase interface and the diffusivity of niobium in the interface have a strong effect on the Gibbs energy dissipation. As the phase interface mobility was recently reassessed, it is clear that the Gibbs energy of niobium segregation and the diffusivity of niobium in the interface must also be reassessed. In this paper both parameters are reassessed in the Fe–C–Nb system using new physical parameters and experimental results from ultra-low carbon steels.