DEVELOPMENT OF PROCESSING MAPS FOR INTERCRITICAL ANNEALING USING THE PHASE FIELD APPROACH
A phase field model has been developed to simulate microstructure evolution during intercritical annealing.The model describes ferrite recrystallization,intercritical austenite formation and decomposition.In particular,the overlap of ferrite recrystallization and austenite formation for sufficiently fast line speeds has been taken into account in the model.The model has been benchmarked and validated with experimental data for a DP600 steel.Further,simulations have been performed with a systematic variation of processing parameters,i.e.line speed and intercritical holding temperature.Processing maps have been constructed based on these simulations providing martensite fraction and ferrite grain size as a function of line speed and intercritical temperature for the investigated DP600 steel.This study demonstrates the phase field approach as a promising tool to develop through-process models for advanced high strength steels.
Intercritical annealing Phase field model Dual-phase steel
Benqiang Zhu Matthias Militzer
The Centre for Metallurgical Process Engineering,The University of British Columbia,309-6350 Stores Rd.,Vancouver,BC,Canada V6T1Z4
国内会议
杭州
英文
387-393
2015-11-11（万方平台首次上网日期，不代表论文的发表时间）