ArticleScientific reports2025
Accelerated age-hardening kinetics in additively manufactured 18Ni(300) maraging steel.
Article in Scientific reports, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
In this comparative study between Laser Powder Bed Fusion (L-PBF) versus conventional hot-rolled 18Ni(300) maraging steel, accelerated age-hardening kinetics was determined due to the variation in annealing behaviour. Conventionally produced 18Ni(300) maraging steel exhibited significant grain growth upon solution annealing at 850-1050 °C, which was not evident in the L-PBF counterpart where oxide particles present in as-built condition inhibited grain growth. Electron Backscatter Diffraction (EBSD) analysis showed higher thermal stability of additively manufactured components up to 1050 °C, where significant grain growth was found in hot-rolled and annealed parts. Despite these differences, both processing routes achieved similar peak hardness after ageing, although L-PBF samples displayed faster initial hardening due to enhanced precipitation kinetics linked to finer grain structure and higher grain boundary density.
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