Authors:
Agustin Diaz (REM Surface Engineering, USA)
Joshua Boykin (REM Surface Engineering, USA)
Patrick McFadden (REM Surface Engineering, USA)
Eric Wendt (REM Surface Engineering, USA)
Joshua Nittinger (REM Surface Engineering, USA)
James Osborne (REM Surface Engineering, USA)
Chad Beamer (Quintus Technologies, LLC, USA)
Abstract:
Metal additive manufacturing (AM) offers the promise of free-form fabrication and address issues like high costs, dwindling supply chains, and long lead-times. However, adoption of AM is hindered by surface and near-surface related defects (SRDs) that degrade mechanical strength and corrosion resistance, making AM parts unsuitable for critical applications. Optimized post-processing technologies, such as surface finishing processes and heat-treatments, are essential to improving the reliability of AM components. This study investigates the mechanical and corrosion resistance properties of AM fabricated alloys (Ti-6Al-4V, IN-625, AlF357, IN-718, SS15-5PH, SS17-4PH, and SS316L) subjected to various heat treatments and surface finishing techniques. Heat-treatments and chemical and chemical-mechanical polishing (CP and CMP) are examined for their effectiveness in addressing porosity reduction, SRD elimination, and their effects in tensile strength, fatigue performance, and corrosion resistance, supporting AM’s integration into high-performance applications. This work was funded by NASA (SBIR-18-P2-Z3.01-5453) and USAF (SBIR-FA864923P1086, SBIR-FA864921P0854, and SBIR-FA864921P0815).
DOI:
https://doi.org/10.59499/EP256764598
