Selective laser melting has received a great deal of attention in recent years. Nevertheless, research has been mainly focused on the technical issues and their relationship with the final microstructure and monotonic properties. Fatigue behaviour has rarely been addressed, and the emphasis has been placed on high-cycle regimes. The aim of this paper is, therefore, to study, in a systematic man...

The mechanical behaviour of as-built DED-produced 18Ni300 Maraging steel was studied by manufacturing a wall-like structure from which three different specimen types were obtained: specimens in the loading direction same as printing (vertical), these two directions perpendicular (horizontal), and bimetallic interface between AISI 1045 substrate tested. yield strength produced samples 987.9±34.2...

Selective Laser Melting (SLM) is becoming very diffused in layer manufacturing processes because of the possibility to build complex 3D parts. The process is mainly suited for the production of tools and inserts with internal undercuts and channels for conformal cooling in fast injection molding cycles. Manufacturing of parts is obtained by consolidating successive layers of metal powder materi...

This paper presents the results of an experiment to investigate the high cycle fatigue properties of the ultra-high strength steel TM210A. A constant amplitude rotating bending fatigue experiment was performed at room temperature at stress ratio R = -1. In order to evaluate the notch effect, the fatigue experiment was carried out upon two sets of specimens, smooth and notched, respectively. In ...

Slow strain rate tests on hydrogen-containing specimens of PH13–8Mo maraging stainless steel showed H-assisted subcritical quasi-cleavage cracking, accelerating material failure. Fractographic analysis revealed that is composed flat brittle areas and rougher areas. Electron backscatter diffraction (EBSD) was performed a secondary subcritically grown crack. High resolution EBSD significant cryst...