This paper deals with the fatigue performance of maraging steels manufactured by Powder Bed Fusion using a laser beam (L-PBF). The objective of the study was to develop a method for the rapid and reliable characterization of the produced material’s fatigue limit using infrared (IR) thermography. Preliminary conventional fatigue tests were performed, revealing two distinct populations among the printed specimens depending on their locations on the building plate. Next, fatigue tests instrumented by IR camera were processed using heat source reconstruction to measure the mechanical dissipation due to fatigue damage. A statistical model was then proposed to identify the fatigue limit of the material. Finally, a practical application was performed to compare different manufacturing strategies using the same powder, opening perspectives for the rapid optimization of the printing process with respect to the fatigue performance of the parts produced.

本文探讨了用激光束（L-PBF）通过粉末床熔合技术制造的马氏体时效钢的疲劳性能。该研究的目的是开发一种使用红外（IR）热成像技术快速可靠地表征所生产材料的疲劳极限的方法。进行了常规的初步疲劳测试，结果显示了打印样本中两个不同的种群，这取决于它们在建筑板上的位置。接下来，使用热源重建技术对由红外热像仪进行的疲劳测试进行处理，以测量由于疲劳损坏而引起的机械耗散。然后提出了一个统计模型来识别材料的疲劳极限。最后，进行了实际应用，以比较使用相同粉末的不同制造策略，