Au-Pt合金凝固-固态相变微观组织演化相场法模拟

余东, 马威龙, 王亚莉, 王锦程

Phase Field Modeling of Microstructure Evolution During Solidification and Subsequent Solid-State Phase Transformation of Au-Pt Alloys

YU Dong, MA Weilong, WANG Yali, WANG Jincheng

表1 Au-Pt合金的热物性参数及模拟参数

Table1 Physical property parameters of Au-Pt alloy and related modeling parameters

Parameter Variable Unit Value Liquid phase solute diffusivity DL m2·s-1 3.5 × 10-9 [23] Solid phase solute diffusivity DS m2·s-1 0.5 × 10-12[23] Solid-liquid interface energy σSL J·m-2 0.5 Solid-solid interface energy σSS J·m-2 1 Mole volume Vm m3·mol-1 9.8 × 10-6 Thickness of solid-liquid interface λLS μm 5dx Thickness of solid-solid interface λSS μm 5dx Anisotropy coefficient of interface energy γ4 - 0.02 Mean radius of initial nucleus r μm 10dx