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2025 Brytan LPBF Duplex Steel Heat Treatment

A. Mulhi, S. Dehgahi

2026enadditive manufacturinglaser powder bed fusionsuper duplex stainless steelheat treatmentmicrostructurecorrosion resistance

Abstract

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Duplex stainless steels (DSS) combine remarkable mechanical properties with superior corrosion resistance, making them desirable for various applications. This study investigates the challenges associated with achieving a balanced microstructure of ferrite and austenite in DSS when processed using Laser Powder Bed Fusion (LPBF). The objective is to explore the impacts of post-processing techniques, specifically stress-relief annealing, on enhancing the mechanical and corrosion resistance properties of DSS. Through a series of experiments, we assess the microstructural changes resulting from different annealing parameters and their subsequent effects on polarization resistance and charge transfer resistance. The results reveal that solution-annealed Super Duplex Stainless Steel (SDSS) exhibits improved corrosion resistance, while stress-relief annealing at 300°C for 5 hours facilitates modest enhancements in electrochemical properties compared to as-printed samples. Additionally, it was found that the mechanical properties and microstructure of as-printed HDSS significantly improve upon post-processing. Future work will focus on optimizing time-temperature parameters for stress relief to further enhance the quality of LPBF-printed DSS components.

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Cite This Work

@article{38e6ed23-71db-4fa3-b1f6-e974988fd098,
  title={2025 Brytan LPBF Duplex Steel Heat Treatment},
  author={A. Mulhi and S. Dehgahi},
  year={2026},
  language={en}
}
TY  - JOUR
TI  - 2025 Brytan LPBF Duplex Steel Heat Treatment
AU  - A. Mulhi
AU  - S. Dehgahi
PY  - 2026
LA  - en
ER  -

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