Direct metal laser sintering is a metal-based additive manufacturing process used to make components directly from metal powders in a layered fashion. A high-intensity laser beam is used to fuse the metal powders during the scanning of the powder bed. In this process, rapid heating and solidification take place, which lead to thermal stress in the build part that can affect the mechanical properties of the fabricated component. In the present work, a thermo-mechanical model was developed using a finite element approach to study the effect of hatch spacing on residual stress in the AlSi10Mg build part. From the simulation results, it was found that there was a decrease in residual stress in the build part with an increase in hatch spacing. This simulation study will help the manufacturer and the designer to select appropriate hatch spacing for printing the component with minimum residual stress.

中文翻译：

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在 AlSi10Mg 构建部件的直接金属激光烧结中，随着舱口间距的变化预测构建部件的残余应力和变形：热机械建模

直接金属激光烧结是一种基于金属的增材制造工艺，用于以分层方式直接从金属粉末制造组件。在粉末床扫描过程中，使用高强度激光束熔化金属粉末。在此过程中，会发生快速加热和固化，这会导致构建部件中产生热应力，从而影响制造部件的机械性能。在目前的工作中，使用有限元方法开发了一个热机械模型，以研究舱口间距对 AlSi10Mg 构建部件中残余应力的影响。从模拟结果中发现，随着舱口间距的增加，构建部分的残余应力降低。