Molecular dynamics simulations of dislocation–coherent twin boundary interaction in face-centered cubic metals
Source abstract
Abstract
The interaction mechanisms between dislocations and coherent twin boundary (CTB) were determined with molecular dynamics simulations. The dislocation slip rate is found to depend on the temperature and the shear rate. The edge and screw dislocations displayed different mechanisms when they interacted with the CTB. The edge dislocation could pass through the CTB, leaving a twinning dislocation to heal the boundary, while the screw dislocation was absorbed by the CTB. The activation energy of overcoming the CTB was also calculated. The energy barrier for the edge dislocation to pass through the CTB was much higher than that needed for the screw one to be absorbed.
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Research context
OpenAlex topics: Microstructure and mechanical properties · High Temperature Alloys and Creep · Fusion materials and technologies
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