Maraging steel fatigue properties processed by forging and additive manufacturing.

Abstract

Fatigue properties for three different manufacturing processes of the same material are studied. The material is Corrax® and Corrax AM®, a maraging steel from Uddeholms AB. The three different batches representing the three different manufacturing methods include the reference Corrax® batch and two Powder bed laser fused Corrax AM® batches one of which is hipped and the other is not. All the batches are heat treated to achieve maximum hardness levels. Further tests are performed on the batches to understand the behavior of the material and the influence of the manufacturing processes on the material’s properties. The results show no statistical meaningful difference between the batches in terms of low cycle fatigue performance. However microstructure, defects present and mechanical properties show differences.