Geometrically necessary dislocations induced size effect in the torsional stress relaxation behavior of thin metallic wires
Abstract
Torsional stress relaxation experiments on thin copper wires are performed. A size effect is observed. That is a faster relaxation deformation arises in a thinner wire. As the wire diameter increases, the activation volume increases but the strain rate sensitivity decreases. A greater effect of geometrically necessary dislocations on the relaxation deformation accounts for the size effect. In a thinner wire, geometrically necessary dislocations...
Paper Details
Title
Geometrically necessary dislocations induced size effect in the torsional stress relaxation behavior of thin metallic wires
Published Date
Dec 1, 2019
Journal
Volume
173
Pages
129 - 133
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