In718的激光粉末床熔融（LPBF）以及500和1000°C预热的影响：原位研究

Ur Rehman Asif, Pitir Fatih, Salamci Metin Uymaz

ERMAKSAN, Bursa 16065, Turkey.

Department of Mechanical Engineering, Gazi University, Ankara 06570, Turkey.

Materials (Basel). 2021 Nov 5;14(21):6683. doi: 10.3390/ma14216683.

The morphology of a melt pool has a critical role in laser powder bed fusion (LPBF). Nevertheless, directly characterizing the melt pool during LPBF is incredibly hard. Here, we present the melt pool flow of the entire melt pool in 3D using mesoscopic simulation models. The physical processes occurring within the melt pool are pinpointed. The flow patterns throughout the same are exposed and measured. Moreover, the impact of pre-heating at 500 and 1000 °C has been described. The study findings offer insights into LPBF. The findings presented here are critical for comprehending the LPBF and directing the establishment of improved metrics for process parameters optimization.

熔池的形态在激光粉末床熔融（LPBF）中起着关键作用。然而，在LPBF过程中直接表征熔池极其困难。在此，我们使用介观模拟模型以三维方式展示了整个熔池的熔池流动情况。明确了熔池内发生的物理过程，揭示并测量了其整个过程中的流动模式。此外，还描述了在500℃和1000℃预热的影响。该研究结果为LPBF提供了见解。此处呈现的结果对于理解LPBF以及指导建立改进的工艺参数优化指标至关重要。