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RESEARCH PAPERS

Neutron Irradiation and the Yield Surfaces of Copper

[+] Author and Article Information
T. D. Dudderar

Bell Telephone Laboratories, Murray Hill, N. J.

J. Duffy

Brown University, Providence, R. I.

J. Appl. Mech 34(1), 200-206 (Mar 01, 1967) (7 pages) doi:10.1115/1.3607625 History: Received March 15, 1966; Online September 14, 2011

Abstract

Tests were conducted to determine the effects of irradiation and plastic deformation on the yield surfaces of polycrystalline copper. It was found that the principal effect of plastic deformation on unirradiated copper was to translate the yield surface without appreciably changing its size or shape. Irradiation, on the other hand, produced a very large change in the overall size of the initial yield surface; in other words, it produced an effect phenomenologically similar to extensive isotropic strain-hardening. In addition, the shape of the initial yield surface after irradiation was dependent on the plastic strain offset chosen to define yield. This effect was not observed for the unirradiated metal. Extensive plastic deformation after irradiation caused the yield surface to translate and grow smaller without significantly changing shape.

Copyright © 1967 by ASME
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