Kluczyński Janusz, Sarzyński Bartłomiej, Dražan Tomáš, Łuszczek Jakub, Kosturek Robert, Szachogłuchowicz Ireneusz
Institute of Robots & Machine Design, Faculty of Mechanical Engineering, Military University of Technology, Gen. S. Kaliskiego St., 00-908 Warsaw, Poland.
Department of Mechanical Engineering, Faculty of Military Technology, University of Defence, 662 10 Brno, Czech Republic.
Materials (Basel). 2024 Sep 5;17(17):4384. doi: 10.3390/ma17174384.
This study investigates the microstructural effects of process parameters on Ti6Al4V alloy produced via powder bed fusion (PBF) using laser beam melting (LB/M) technology. The research focuses on how variations in laser power, exposure velocity, and hatching distance influence the final material's porosity, microhardness, and microstructure. To better understand the relationships between process parameters, energy density, and porosity, a simple mathematical model was developed. The microstructure of the alloy was analyzed in the YZ plane using a confocal microscope. The study identified optimal parameters-302.5 W laser power, 990 mm/s exposure velocity, and 0.14 mm hatching distance-yielding the lowest porosity index of 0.005%. The material's average hardness was measured at 434 ± 18 HV0.5. These findings offer valuable insights for optimizing printing parameters to produce high-quality Ti6Al4V components using PBF-LB/M technology, shedding light on the critical relationship between process parameters and the resulting microstructure.
本研究调查了使用激光束熔化（LB/M）技术通过粉末床熔融（PBF）生产的Ti6Al4V合金中工艺参数的微观结构效应。该研究聚焦于激光功率、曝光速度和扫描间距的变化如何影响最终材料的孔隙率、显微硬度和微观结构。为了更好地理解工艺参数、能量密度和孔隙率之间的关系，开发了一个简单的数学模型。使用共聚焦显微镜在YZ平面分析了合金的微观结构。该研究确定了最佳参数——302.5W激光功率、990mm/s曝光速度和0.14mm扫描间距——产生了最低的孔隙率指数0.005%。测得材料的平均硬度为434±18 HV0.
