Structure-dependent grain boundary deformation and fracture at high temperatures

Tadao Watanabe, Sadahiro Tsurekawa, Shigeaki Kobayashi, Shin Ichi Yamaura

Research output: Contribution to journalArticlepeer-review

42 Citations (Scopus)

Abstract

This paper gives an overview of structure-dependent intergranular deformation and fracture of metallic bicrystals and polycrystals at high temperatures. Structure-dependent grain boundary sliding and migration during high temperature deformation are discussed in connection with grain boundary structural change by the interaction with lattice dislocations and by intrinsic and extrinsic grain boundary structural transformation due to temperature and segregation, respectively. "Grain boundary engineering" for improvement in creep strength, development of superplasticity and control of oxidation-assisted intergranular brittleness are introduced which were successfully achieved by engineering the grain boundary microstructures characterized by the grain boundary character distribution (GBCD), the grain boundary connectivity and grain size.

Original languageEnglish
Pages (from-to)140-147
Number of pages8
JournalMaterials Science and Engineering A
Volume410-411
DOIs
Publication statusPublished - 2005 Nov 25
Externally publishedYes

Keywords

  • Grain boundary character distribution
  • Grain boundary connectivity
  • Grain boundary engineering
  • Grain boundary microstructure
  • Grain boundary sliding and migration
  • Structural transformation

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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