تجزیه و تحلیل پایه ای از تاثیر ویژگی های پودر در لیزر انتخابی ذوب مولیبدن بر اساس یک مدل شبیه سازی چند فیزیکی

Selective Laser Melting (SLM) offers great potential for the processing of molybdenum as it allows the production of parts that can hardly be fabricated in a classical way. The workpiece is built up by melting up powder layer by layer. Besides the applied laser parameters, the characteristics of the powder and the deposited powder layer have a crucial influence on the dynamics of the process and the final processing result. In order to get a fundamental understanding of these influences, numerical simulations are a versatile tool as they allow a detailed look on isolated parameters. In this contribution a coupled thermo-fluid dynamical simulation model for SLM is applied for a fundamental analysis of the influence of powder characteristics in SLM of molybdenum. The results allow a deeper insight into the influences of powder particle size and powder particle arrangement on the SLM process and the formation of the molten track.