[SY-F7] Symposium F-7

[SY-F7] Phase-field simulation of solidification morphology in laser powder deposition of Fe-B alloys

^○Xiaoxia Li, Xiangge Qin (School of Materials Science and Engineering, Jiamusi Univ., China)

Laser melting deposition is a complicated physical and chemical metallurgical process. In this paper, the phase field model of alloy solidification is coupled to laser melting deposition process, and a finite element model of heat transfer is established. By studying the variation of the spacing of dendrite Fe₂B of Fe-B alloy powder under the conditions of laser melt deposition, the robustness and accuracy of the coupled model were verified. Experiments show that under different temperature gradient conditions, the size and spacing of the dendrite Fe₂B of the cross-section morphology of the Fe-B alloy deposited by laser melting deposition have changed significantly. The quantitative phase field simulation of the heat transfer finite element model under local steady state conditions confirms this behavior. This work demonstrates the potential of the phase-field method to simulate laser melting deposition techniques and analyze the potential of alloy solidification under complex heat transfer conditions.