Phase field simulation of eutectoid microstructure during austenite-pearlite phase transformation
Shaojie Lv, Hong‐Hui Wu, Kaiyang Wang, Chaolei Zhang, Jiaming Zhu, Shuize Wang, Guilin Wu, Junheng Gao, Xusheng Yang, Xinping Mao
Abstract
Pearlitic steel, known for its superior strength, plasticity and wear resistance, is widely used in diverse applications including light rail, spring production, wire manufacturing, high-rise constructions, etc. The pearlite phase transformation involves a complex transformation process of three phases and two interfaces, and its phase transformation process and complex physical nature necessitate further exploration and study. In this work, the austenitic-pearlite transformation in Fe-0.77C wt.% binary alloys and Fe-0.7C-xMn (x=0.1, 0.2, 0.3) wt.% ternary alloys were examined by using a CALPHAD-based multicomponent multi-phase-field model. The effects of isothermal transformation temperature, cooling rate, and Mn content on the microstructure evolution during the austenite-pearlite transformation were discussed. Furthermore, the multi-component diffusion is captured by phase-field modeling of the lamellar pearlite growth. The current findings offer a novel perspective for investigating the pearlite microstructure in relation to varied compositions and heat treatment processes.