Arrest of weld-decay in 304 austenitic stainless steel by twin-induced grain boundary engineering

H. Kokawa, M. Shimada, M. Michiuchi, Z. J. Wang, Y. S. Sato

Research output: Contribution to journalArticlepeer-review

98 Citations (Scopus)

Abstract

A twin-induced grain boundary engineered 304 austenitic stainless steel with a high frequency of coincidence site lattice boundaries produced by a one-step thermomechanical process was arc-welded. The heat-affected zone was examined by orientation imaging microscopy and corrosion tests. The results indicated that the intergranular corrosion due to sensitization in the heat-affected zone were perfectly suppressed, because the high frequency of coincidence site lattice boundaries and the optimum grain boundary character distribution were stable in the grain boundary engineered stainless steel during arc-welding. The grain boundary engineering can arrest the weld-decay of austenitic stainless steel effectively.

Original languageEnglish
Pages (from-to)5401-5407
Number of pages7
JournalActa Materialia
Volume55
Issue number16
DOIs
Publication statusPublished - 2007 Sep

Keywords

  • Austenitic steels
  • Coincidence boundaries
  • Corrosion
  • Orientation imaging microscopy
  • Welding

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Polymers and Plastics
  • Metals and Alloys

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