Optimization of grain boundary character distribution for intergranular corrosion resistant 304 stainless steel by twin-induced grain boundary engineering

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

Research output: Contribution to journalArticlepeer-review

473 Citations (Scopus)

Abstract

The effects of process parameters, pre-strain, annealing temperature, time, etc. on grain boundary character distribution (GBCD) and intergranular corrosion in thermomechanical treatment were examined during grain boundary engineering of type 304 austenitic stainless steel. Slight pre-strain annealing at a relatively low temperature resulted in excellent intergranular corrosion resistance due to optimized GBCD, i.e. the uniform distribution of a high frequency of coincidence site lattice boundaries and consequent discontinuity of random boundary network in the material. The optimum distribution can be formed by introduction of low energy segments on migrating random boundaries during twin emission and boundary-boundary reactions in the grain growth without generation of new random boundaries.

Original languageEnglish
Pages (from-to)2331-2341
Number of pages11
JournalActa Materialia
Volume50
Issue number9
DOIs
Publication statusPublished - 2002 May 24

Keywords

  • Austenite
  • Corrosion
  • Grain boundaries
  • Grain boundary engineering

ASJC Scopus subject areas

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

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