了解异质成核并预测线材和电弧添加剂制造钢材时的晶粒大小

Y Xu, G. Tranell, Y Li
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引用次数: 0

摘要

接种已成为金属增材制造中实现晶粒细化的一种常见做法,近年来其在钢材中的应用已得到广泛研究。然而,人们对增材制造中高温梯度和快速冷却凝固条件下等轴晶粒的成核行为仍不甚了解。同时,也缺乏针对钢材增材制造的晶粒尺寸预测模型。本研究开发了一种微观结构数值模拟模型,用于模拟增材制造中晶粒的生长和成核行为,并预测具有等轴晶粒结构的接种钢的晶粒大小。这里选择了双相不锈钢的线弧快速成型(WAAM)作为案例研究。模拟结果与实验结果非常吻合。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Understanding heterogeneous nucleation and predicting grain size in wire and arc additive manufacturing of steels with inoculation
Inoculation has become a common practice to achieve grain refinement in metal additive manufacturing, and its application in steels has been extensively investigated in recent years. However, the nucleation behavior of equiaxed grains under high temperature gradient and fast cooling rate solidification conditions in additive manufacturing is still not well understood. And grain size prediction models for additive manufacturing of steel is lacking. In this work, a numerical microstructure simulation model is developed to simulate the growth and nucleation behaviors of grains in additive manufacturing, and to predict the grain size of inoculated steels with equiaxed grain structure. Here a wire and arc additive manufacturing (WAAM) of duplex stainless steel is selected for case study. The simulation results are in a good agreement with the experimental results.
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