期刊
APPLIED PHYSICS LETTERS
卷 94, 期 17, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.3129166
关键词
copper; dislocation nucleation; dislocation structure; ductility; molecular dynamics method; multilayers; nanocomposites; nickel; niobium
资金
- U. S. Department of Energy [DE-FG02-07ER4635]
We investigate the deformation behavior of bimetallic and trimetallic nanoscale multilayer metallic composites under biaxial loading using molecular dynamics. Three types of structures were studied: (a) Cu-Ni fcc/fcc bilayer, (b) Cu-Nb fcc/bcc bilayer, and (c) Ni-Cu-Nb fcc/fcc/bcc trilayer. A configuration with a dislocation structure inside is generated by initially loading a perfect structure to a high strain to nucleate dislocations, then completely unloading it and loading it again. The comparison between the deformation behavior of bilayer and trilayer structures revealed that the Cu-Ni is more ductile, the Cu-Nb is stronger, and the trilayer structure exhibits both high strength and ductility.
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