TY - JOUR
T1 - Structure-dependent grain boundary deformation and fracture at high temperatures
AU - Watanabe, Tadao
AU - Tsurekawa, Sadahiro
AU - Kobayashi, Shigeaki
AU - Yamaura, Shin Ichi
N1 - Funding Information:
This work was supported by the Grant-in Aid from the Ministry of Education, Culture, Sport, Art and Science (Grant No.: (B)(2) 10555226: “ Grain Boundary and Interfacial Architecture for High Temperature Advanced Materials ”).
PY - 2005/11/25
Y1 - 2005/11/25
N2 - 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.
AB - 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.
KW - Grain boundary character distribution
KW - Grain boundary connectivity
KW - Grain boundary engineering
KW - Grain boundary microstructure
KW - Grain boundary sliding and migration
KW - Structural transformation
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U2 - 10.1016/j.msea.2005.08.083
DO - 10.1016/j.msea.2005.08.083
M3 - Article
AN - SCOPUS:28844452526
VL - 410-411
SP - 140
EP - 147
JO - Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing
JF - Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing
SN - 0921-5093
ER -