Effect of interstitial carbon and nitrogen on corrosion of FeCoCrNi multi-principal element alloys made by selective laser melting

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

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Detail(s)

Original languageEnglish
Pages (from-to)52-63
Journal / PublicationJournal of Materials Science and Technology
Volume148
Online published30 Nov 2022
Publication statusPublished - 10 Jun 2023

Abstract

The corrosion behaviors of selective laser melted (SLMed) FeCoCrNi multi-principal element alloys (MPEAs) with carbon or nitrogen addition in 0.5 M H2SO4 solution were investigated. Both C and N addition refined the grains and introduced a heterogeneous structure in SLMed FeCoCrNi MPEA, but they had opposite effects on the corrosion behavior. The doped carbon participated as nano-sized carbides in SLMed MPEA, and localized galvanic corrosion occurred, degrading the corrosion resistance. The doped nitrogen was gathered with chromium and formed CrN chemical clusters in SLMed MPEA, and a protective passive film with a higher Cr2O3/Cr(OH)3 ratio formed, which improved corrosion resistance.

Research Area(s)

  • Selective laser melting, Interstitial element, Multi-principal element alloys, Acid corrosion

Citation Format(s)

Effect of interstitial carbon and nitrogen on corrosion of FeCoCrNi multi-principal element alloys made by selective laser melting. / Chen, Wenyu; Zhou, Rui; Li, Wanpeng et al.
In: Journal of Materials Science and Technology, Vol. 148, 10.06.2023, p. 52-63.

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review