The role of the process parameters under a fixed energy density in Electron Beam Melting of Ti6Al4V was investigated. The beam current, scan speed and line offset were varied in a wide range keeping constant the energy density achieved, aiming to highlight the influence of each parameter on the properties of the printed parts. Microstructure, microhardness and top surface roughness were chosen as measured output. The results obtained showed that the amount of energy adsorbed by the metal is depending on beam current and scan speed, this due to the complex interaction between the electrons of the beam and the atoms of the material. As a consequence, the samples showed different properties, even if the adopted energy density was the same, the influence of the process parameters on the above-mentioned measured output was assessed.

研究了在固定能量密度下工艺参数在Ti6Al4V电子束熔化中的作用。束电流，扫描速度和线偏移在很宽的范围内变化，以保持所获得的能量密度恒定，旨在突出每个参数对印刷零件性能的影响。选择显微组织，显微硬度和顶表面粗糙度作为测量的输出。获得的结果表明，金属吸收的能量取决于电子束电流和扫描速度，这是由于电子束中的电子与材料原子之间复杂的相互作用所致。结果，样品显示出不同的性质，即使采用的能量密度相同，也评估了工艺参数对上述测量的输出的影响。