On the unusual intergranular corrosion resistance of 316L stainless steel additively manufactured by selective laser melting

Majid Laleh, Anthony E. Hughes, Wei Xu, Nima Haghdadi, Ke Wang, Pavel Cizek, Ian Gibson, Mike Yongjun Tan*

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

26 Citations (Scopus)

Abstract

The intergranular corrosion (IGC) resistance of 316L stainless steel (316L SS) produced by selective laser melting (SLM) was investigated using microscopy analysis and electrochemical measurements. The IGC resistance of SLM-produced 316L SS, determined using a double-loop electrochemical potentiokinetic reactivation test, was found to be substantially higher than that of conventional 316L SS. This unusual behaviour was explained by the fact that no Cr-rich precipitates were detected for SLM-produced specimens after long-term sensitisation heat-treatment and those SLM-produced specimens exhibited a high frequency of twin boundaries and low-angle grain boundaries along with fine grains, leading to the avoidance of localised Cr depletion.

Original languageEnglish
Article number108189
JournalCorrosion science
Volume161
DOIs
Publication statusPublished - Dec 2019

Keywords

  • 316L stainless steel
  • Additive manufacturing
  • Grain boundary
  • Intergranular corrosion
  • Precipitation

Fingerprint Dive into the research topics of 'On the unusual intergranular corrosion resistance of 316L stainless steel additively manufactured by selective laser melting'. Together they form a unique fingerprint.

Cite this