Effect of edge print parameters on microstructure and high temperature solution nitriding response of additively manufactured austenitic stainless steel

Cecilie V. Funch*, Thomas L. Christiansen, Marcel A. J. Somers

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

The as-built microstructure of edge printing parameters in the laser powder-bed fusion process is investigated as well as the effect of edge parameters on the response to high temperature solution nitriding. The results show that using edge parameters leads to a zone of elongated austenite grains with shallow melt pools. Subjecting parts printed with edge parameters to high temperature solution nitriding (and high temperatures in general) results in the formation of equi-axed grains with a high density of annealing twins. Conversely, bulk parameters create a pinning effect and preserve the fine misorientation structure inside the elongated structure from the as-built condition. The results show that a high temperature solution nitriding treatment is apt to post-processing of additively manufactured 316L.
Original languageEnglish
Article number126385
JournalSurface and Coatings Technology
Volume403
Number of pages11
ISSN0257-8972
DOIs
Publication statusPublished - 2020

Keywords

  • Additive manufacturing
  • Austenitic stainless steel
  • Edge parameters
  • High temperature solution nitriding
  • Microstructure evolution

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