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November 7, 2022Fatigue & Fracture of Engineering Materials & StructuresOpen Access

Fatigue response of additively manufactured as‐built 15‐5 PH stainless steel and effects of machining and thermal and surface treatments

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Authors

DCDario CroccoloNBNebojša BogojevićMAMassimiliano De Agostinis

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Overview

Experimental study demonstrates that machining and shot-peening double fatigue strength in 3D-printed 15-5 PH stainless steel, indicating post-processing can rival conventional wrought metal.

Key Points

  • To evaluate the individual and combined effects of heat treatment, machining, and shot-peening on the fatigue performance of additively manufactured 15-5 PH stainless steel.
  • Tested vertically built cylindrical specimens under rotating bending fatigue using a 2-by-3 factorial experimental design to generate S-N curves and fatigue limits.
  • Applied an ANOVA-based statistical approach to compare fatigue trends across treatment combinations.
  • Performed micrographic and fractographic analyses to characterize microstructures, crack initiation sites, and failure mechanisms.
  • Heat treatment conducted without prior surface machining reduced fatigue resistance due to material embrittlement.
  • Machining followed by shot-peening doubled the fatigue strength compared to the as-built condition, achieving fatigue limits close to those of wrought material even in the absence of heat treatment.

Cite This Study

Croccolo et al. (2022) studied this question.

synapsesocial.com/papers/6a127150ea48cb855a34d89ahttps://doi.org/10.1111/ffe.13875
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