Abstract

A mesoscopic simulation based on random packing powder bed model was established to study the heat behavior of CP-Ti during selective laser melting. The characteristics of the molten pool under the interaction of laser and powder, and the influence of laser power on the thermal behavior, hydrodynamics and surface morphology evolution of the molten pool were studied. The results show that with the increase of laser power, the maximum temperature, temperature change rate, lifetime of molten pool and size are greatly improved. In addition, the characteristics and heat behavior of the molten pool under the double track are mainly studied in this study. It is found that the maximum temperature, lifetime, and the length and width of the molten pool of the second track are higher than those in the first, and with the increase of laser power, the length width ratio of the second track in molten pool becomes larger.

Graphic Abstract

中文翻译：

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商业纯钛粉在选择性激光熔化过程中的热行为多物理场建模

摘要

建立了基于随机堆积粉末床模型的细观模拟来研究CP-Ti在选择性激光熔化过程中的热行为。研究了激光与粉末相互作用下熔池的特性，以及激光功率对熔池热行为、流体动力学和表面形貌演化的影响。结果表明，随着激光功率的增加，最高温度、温度变化率、熔池寿命和尺寸都有很大提高。此外，本研究主要研究了双轨下熔池的特性和热行为。发现第二轨道的最高温度、寿命、熔池的长度和宽度均高于第一轨道，并且随着激光功率的增加，

图形摘要