#7237. Effect of post-processing on microstructure and mechanical properties of Alloy 718 fabricated using powder bed fusion additive manufacturing processes

October 2026publication date
Proposal available till 26-05-2025
4 total number of authors per manuscript0 $

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Journal’s subject area:
Mechanical Engineering;
Industrial and Manufacturing Engineering;
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Abstract:
This study aims to investigate additive manufacturing of nickel-based superalloy made by powder bed fusion processes: powder bed fusion laser beam and powder bed fusion electron beam. This work has focused on the influence of building methods and post-fabrication processes on the final part properties, including microstructure, surface quality, residual stresses and mechanical properties. Blasting and shot peening reduced the roughness even more but did not affect the surface finish as much. However, impact toughness after hot isostatic pressing was surprisingly high. The two processes gave different results and also responses to post-treatments, which could be of advantage or disadvantage for different applications.
Keywords:
Alloy 718; Hot isostatic pressing (HIP); Mechanical properties; Powder bed fusion electron beam (PBF-EB); Powder bed fusion laser beam (PBF-LB); Residual stress

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