Grain boundary engineering of 304 austenitic stainless steel by laser surface melting and annealing

Sen Yang, Zhan Jie Wang, Hiroyuki Kokawa, Yutaka S. Sato

Research output: Contribution to journalArticlepeer-review

41 Citations (Scopus)

Abstract

In order to improve the intergranular corrosion resistance of 304 stainless steel, laser surface remelting experiments were conducted using a 2kW continuous wave Nd: YAG laser. The grain boundary character distribution (GBCD) and microstructures of the materials were analyzed using EBSD, SEM and OM. The experimental results showed that combination of laser surface melting and annealing on 304 stainless steel resulted in a high frequency of twin boundaries and consequent discontinuity of random boundary network in the materials, which led to an improvement of resistance to intergranular corrosion. The maximum CSL density could reach 88.6% under optimal processing conditions: 1220K and 28h.

Original languageEnglish
Pages (from-to)847-853
Number of pages7
JournalJournal of Materials Science
Volume42
Issue number3
DOIs
Publication statusPublished - 2007 Feb

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

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