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July 23, 2026Rapid Prototyping JournalOpen Access

A comprehensive investigation on microstructure and mechanical properties optimisation of 316L stainless steel produced by laser-based powder bed fusion

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Authors

EFEhsan FarabiUNSW SydneyMKMahyar KhorasaniRMIT UniversityAMAhmad MirzaiUniversity of California, Irvine

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Overview

Randomized trial investigates optimizing mechanical properties of 316L stainless steel, suggesting effective processing parameters.

Key Points

  • This research introduces an algorithm for optimizing laser-based powder bed fusion parameters to enhance the properties of 316L stainless steel.
  • Utilized Taguchi’s design of experiments to define ideal processing and heat treatment parameters for LB-PBF.
  • Experimentally determined energy density range of 6.7 to 14.7 J/mm3 yielding parts with over 98.8% volumetric mass density.
  • Evaluated microstructure characteristics following heat treatments at 650, 870, and 1,150 °C.
  • Achieved ultimate tensile strength of 970 MPa and elongation of 32%, indicating improved strength and ductility.
  • The optimised LB-PBF conditions resulted in significant mechanical twinning propensity and Hall–Petch effect.
  • Characterized grain growth up to approximately 45 µm after heat treatment, enhancing mechanical properties.

Cite This Study

Farabi et al. (2026) studied this question.

synapsesocial.com/papers/6a61af56faa9903c5116a314https://doi.org/10.1108/rpj-12-2024-0519
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