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This study aims to compare the effects of in situ laser remelting and post-build heat treatment on the properties of SS316L/Inconel 625 functionally graded materials.

June 17, 2026Rapid Prototyping Journal

Comparative study of remelting and heat treatment in SS316l/Inconel 625 functionally graded materials fabricated by laser powder bed fusion

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This study aims to compare the effects of in situ laser remelting and post-build heat treatment on the properties of SS316L/Inconel 625 functionally graded materials.
Fabricated SS316L/Inconel 625 FGMs using laser powder bed fusion (LPBF) with three processing routes: Control, FGM_R (remelting), and FGM_HT (heat treatment).
Evaluated surface roughness, porosity, microstructure, hardness, and mechanical performance through various characterization techniques including micro-CT, XRD, SEM/EDS, and tensile testing.
Conducted comparisons of the FGM_R and FGM_HT processes regarding their effects on material properties.
FGM_R resulted in improved surface quality (average roughness reduced from 6.5 µm to 4.3 µm), lower porosity (decreased from 6.59% to 2.11%), and enhanced mechanical performance with a peak hardness of 364 HV.
Ultimate tensile strength increased by 13.9% and elongation improved by 50.6% in the FGM_R compared to Control specimens.
Heat treatment (FGM_HT) enhanced ductility by 19.2% but led to grain coarsening and reduced hardness, with modest strength gains and persistent voids.

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Implication

Comparative study evaluates remelting and heat treatment effects on materials' performance, suggesting optimal processing for multi-material parts.

Cite This Study

Khodabandeh et al. (2026) studied this question.

synapsesocial.com/papers/6a323ed9d50b63ecad207eda https://doi.org/10.1108/rpj-09-2025-0443

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Implication

Comparative study evaluates remelting and heat treatment effects on materials' performance, suggesting optimal processing for multi-material parts.

Comparative study of remelting and heat treatment in SS316l/Inconel 625 functionally graded materials fabricated by laser powder bed fusion

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Discussion

Implication

Cite This Study

Comparative study of remelting and heat treatment in SS316l/Inconel 625 functionally graded materials fabricated by laser powder bed fusion

Key Points

Discussion

Implication

Cite This Study

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