Purpose The mechanical characterization of selective laser melting (SLM) parts is an industrial challenge. This paper aims to propose a methodology control the fatigue life 17-4Ph stainless steel by selecting most relevant manufacturing parameters: i.e. power, travel speed, hatch spacing and defocusing. Design/methodology/approach A rough refined design experiment (DOE) carried out target best ...

The passive films formed on laser-beam-melted (LBM) and conventional 17-4PH martensitic stainless steels were studied by electrochemical impedance measurements in a 0.5 M NaCl solution at the corrosion potential. described as dielectric layers, data showed that Young model was most appropriate to describe their electrical properties. Fitting of led lower capacitance values, associated with thic...

Abstract We fabricated 17-4PH stainless-steel specimens via Fused Filament Fabrication (metal FFF). Then, we studied the effect of varying specimens’ printing angles to bed surface (part orientation) by analyzing tensile test and scanning electron microscopy results. found anisotropy, where printed at 90° exhibited lowest tensile-stress-at-maximum-load 440.15 MPa elongation-at-break 0.83%, comp...

The impeller under consideration is a rotor wheel of centrifugal compressor, made 17-4PH martensitic precipitated hardening stainless steel. Its total operating lifetime was estimated to 80,000 h, but it fractured beforehand, 4 days after the scheduled overhaul without any observed pre-symptoms. important causes failure were its working conditions: moist H2S environment, applied shaft fitting s...