New model for grain boundary strengthening evaluated by micromechanical characterization

2014 Fiscal Year Final Research Report

• Project/Area Number: 24686082
• Research Category: Grant-in-Aid for Young Scientists (A)
• Allocation Type: Partial Multi-year Fund
• Research Field: Material processing/treatments
• Research Institution: Kyoto University
• Principal Investigator: SHIBATA Akinobu 京都大学, 工学(系)研究科(研究院), 准教授 (60451994)
• Project Period (FY): 2012-04-01 – 2015-03-31
• Keywords: 粒界 / 強化機構 / 力学特性 / マイクロメカニカルキャラクタリゼーション

Outline of Final Research Achievements

The present study evaluated the effect of grain boundary on strength by micromechanical characterization using the specimen containing only one grain boundary. The micromechanical characterization revealed that the strengthening of grain boundary changed with compression axis even in the identical grain boundary. We found that the increases of strength evaluated by compatibility of plastic deformation were much higher than those experimentally obtained. This indicated that it is necessary to consider the factors other than compatibility of plastic deformation to account for grain boundary strengthening.

Free Research Field

材料組織学