Phase field simulation of pearlite growth based on OpenCL parallel baffle

Abstract

Abstract: The KKSO model coupling of phase field and solute field was established. OpenCL parallel computing was used to simulate the eutectoid growth process of Fe-C alloy, and the influence of baffles with different shapes and positions on the co-growth of lamellar pearlite was studied. The results show that GPU computing efficiency reach up to 88 times faster than that of serial CPU, and as the simulation scale increases, acceleration performance is higher; the presence of baffles directly affects the evolution of pearlite morphology that is, the growth of pearlite under the bafflewas be restricted, and the morphology of the pearlite passing through the gap of the baffle changed; when the baffle is located directly above the interface between cementite and ferrite, the cementite on both sides of the baffle merges into an irregular shape; the carbon atoms in the front of the cementite phase cannot meet its growth requirements, so that the growth stops, and adjacent ferrites merge into one phase. Therefore, the presence of the baffle can control the growth morphology of pearlite.

Key words: KKSO model, OpenCL, Fe-C alloy, lamellar pearlite, baffle

CLC Number:

TG248
TG244

ZHU Chang-sheng, LI Yu-jie, MA Fang-lan, FENG Li, LEI Peng. Phase field simulation of pearlite growth based on OpenCL parallel baffle[J]. Journal of Lanzhou University of Technology, 2021, 47(2): 13-20.

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