Phase-Field Modeling for Intercritical Annealing of a Dual-Phase Steel

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• 作者：Benqiang Zhu (1)
  Matthias Militzer (1)
  
  1. The Center for Metallurgical Process Engineering ; The University of British Columbia ; 309-6350 Stores Road ; Vancouver ; BC ; V6T 1Z4 ; Canada
  
• 刊名：Metallurgical and Materials Transactions A
• 出版年：2015
• 出版时间：March 2015
• 年：2015
• 卷：46
• 期：3
• 页码：1073-1084
• 全文大小：3,919 KB
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• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry
  Materials Science
  Metallic Materials
  Structural Materials
  Physical Chemistry
  Ceramics,Glass,Composites,Natural Materials
  
• 出版者：Springer Boston
• ISSN：1543-1940

文摘

A phase-field model has been developed to describe microstructure evolution during intercritical annealing of a commercial DP600 dual-phase steel. The simulations emphasize the interaction between ferrite recrystallization and austenite formation from a cold-rolled pearlite/ferrite microstructure at high heating rates. The austenite-ferrite transformations are assumed to occur under conditions where only carbon partitions between the phases by long-range diffusion. A solute drag model has been integrated with the phase-field model to describe the effect of substitutional alloying elements on the migration of the ferrite/austenite interface. Experimental results including recrystallization and transformation kinetics as well as austenite morphology have been successfully described by carefully adjusting both the austenite nucleation scenario and the interface mobilities.