Nucleation of Slip Bands near Twin Boundary in High-Cycle Fatigue
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概要
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In order to investigate the criterion for the persistent slip band (PSB) formation near a Σ3(111) coherent twin boundary, where is a preferential site for formation of PSB, a highcycle fatigue test is carried out at room temperature using a copper bicrystal specimen with the twin boundary. PSBs are observed near the boundary in the connection with the evolution of extrusion/intrusion on the specimen surface. The slip behavior is different from that predicted by the Schmid factor. A finite element method (FEM) analysis is conducted for the bicrystal, and it reveals that the increase of resolved shear stress on the specific slip system due to the constraint of deformation between the crystals is the main cause for promoting the nucleation of PSB near the twin boundary. By taking into account the interaction between the primary and the secondary slip systems, it is possible to specify the formation behavior of PSB near the twin boundary.
- 一般社団法人日本機械学会の論文
- 2004-04-15
著者
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KITAMURA Takayuki
Department of Mechanical Engineering and Science, Kyoto University
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Kitamura Takayuki
Department Of Engineering Physics And Mechanics Kyoto University
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SUMIGAWA Takashi
Mechanical Engineering Research Laboratory, Hitachi Ltd.
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Sumigawa Takashi
Mechanical Engineering Research Laboratory Hitachi Ltd.:department Of Engineering Physics And Mechan
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Kitamura Takayuki
Department Of Economics Kanagawa University
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Kitamura Takayuki
Department Of Anesthesia And Pain Relief Center The University Of Tokyo Hospital
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