Local valence analysis of 316L austenitic stainless steel produced by laser powder bed fusion

Kazuhisa Sato*, Shunya Takagi, Satoshi Ichikawa, Takuya Ishimoto, Takayoshi Nakano

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

Ultra-rapid cooling of laser powder bed fusion (LPBF) generates a cellular solidification microstructure with submicron-sized periodicity accompanied by non-negligible segregation. In 316L austenitic stainless steel, an important corrosion-resistant alloy, the effect of segregation, particularly variations in Cr concentration, on the corrosion resistance of the LPBF product is unknown. Local valence analysis of the LPBF-produced 316L by electron energy-loss spectroscopy revealed no obvious changes in the energy-loss near-edge structures of Cr and Fe measured within the solidification cellular microstructure, at the cell boundary, or at the melt-pool boundary. This result indicates that solidification segregation in the LPBF-produced 316L is unlikely to affect the corrosion resistance of the material.

Original languageEnglish
Article number136978
JournalMaterials Letters
Volume372
DOIs
StatePublished - 2024/10/01

Keywords

  • 316L stainless steel
  • Additive manufacturing
  • Corrosion resistance
  • Electron energy-loss spectroscopy
  • Laser powder bed fusion

ASJC Scopus subject areas

  • General Materials Science
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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