Thin wall deposition of IN625 using directed energy deposition
Thin wall deposition of IN625 using directed energy deposition
复制标题
DOI：
10.1016/j.jmapro.2020.04.032
复制
发表时间：
2020-08-01
影响因子：
6.2
通讯作者：
Saldana, Christopher
中科院分区：
文献类型：
--
作者：
Kim, Myong Joon;Saldana, Christopher
激光粉末喷吹定向能量沉积（DED）因其小特征沉积能力和几何精度而被广泛应用。工艺参数、控制和工具路径策略对最终产品的几何形状和机械性能的影响已经在许多不同的母体几何形状中进行了研究，然而，在宽度小于激光光斑尺寸的直径的现有薄特征上的沉积尚未得到解决，并且对于各种部件修复应用至关重要。本研究量化的可控因素，有助于光学特性，几何形状，内部孔隙率的特点，和微观结构的存款在沉积过程中的Inconel 625的激光粉末吹DED方法。在薄（0.5 mm）和厚（3.0 mm）基底沉积上，安排了全因子实验计划，其中激光功率（175 W至275 W）和质量流速（2 g/min至20 g/min）变化。这些结果对于通过调整可控工艺参数获得最佳工件质量是有用的。
Laser powder-blown directed energy deposition (DED) is widely used for small feature deposition ability and geometrical accuracy. The effects of process parameters, control, and toolpath strategies on geometry of the final product and mechanical properties have been investigated in many different parent geometries, however, deposition on an existing thin feature that has less width than the diameter of the laser spot size has yet to be addressed and is critical for various component repair applications. This study quantifies controllable factors contributing to optical characterization, geometry, characteristics of internal porosity, and microstructure of the deposit in the deposition processes of Inconel 625 by the laser powder-blown DED method. A full-factorial experimental plan was arranged with variations in laser power (175 W to 275 W) and mass flowrate (2 g/min to 20 g/min) on thin (0.5 mm) and thick (3.0 mm) substrate deposition. These results are useful for deriving an optimal workpiece quality through adjustment of controllable process parameters.