Laser Cladding is one of the leading additive manufacturing technologies enabling the repair of metallic components. Their fatigue reliability depends directly on the material microstructure and consequently on the process parameters. This study highlights the influence of the interlayer dwell time on single-track walls for Inconel 718 repaired components. EBSD analyses show that dwell time both reduces grain size and creates a textural stretch of the microstructure. An optimal dwell time between the writing of successive layers can then be introduced to target a specified microstructure gradient at the interface between the original part and the repaired deposit.

激光熔覆是领先的增材制造技术之一，可修复金属部件。它们的疲劳可靠性直接取决于材料的微观结构，因此取决于工艺参数。这项研究着重说明了Inconel 718修复部件的夹层停留时间对单道墙的影响。EBSD分析表明，停留时间既可以减小晶粒尺寸，又可以使微观结构产生纹理延伸。然后可以引入连续层之间的最佳停留时间，以在原始零件和修复的沉积物之间的界面处指定特定的微观结构梯度为目标。