Fatigue fracture morphology of AISI H13 steel obtained by additive manufacturing

Abstract The paper focuses on researching the effect of fatigue loading metallic structure, lifetime, and fracture surface topographies in AISI H13 steel specimens obtained by selective laser melting (SLM). topography surfaces was measured over their entire area, according to total area method, with an optical three-dimensional measurement system. results SLM 3D printed were compared those reported for conventionally manufactured 13H steel. investigation also considers roughness specimens’ side surface. Moreover, fractographic evaluation conducted using scanning electron microscopy confirms that predominant mechanism is transgranular fracture. Microtomography done after mechanical showed influence stress level porosity distribution. Both Micro-CT investigations confirm higher stresses result coarser much more uniform observed fractured samples. These comprehensive quantitative qualitative analyses are beneficial predict failure conditions parts, especially case damage. From analysis SLM-manufactured topography, it possible conclude larger loadings acting specimen, rougher because ductile mode dominates. It has been proven degree changes along length sample most stressed specimens.