Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1583379 | Materials Science and Engineering: A | 2007 | 7 Pages |
Abstract
Structure and properties of oxygen-free copper (99.98%) in dependence on strain and routes during equal-channel angular (ECA) pressing at room temperature up to strains É â¼Â 29 are studied. At É â¼Â 29, according to orientation imaging microscopy (OIM) analysis, the minimum size of structure elements, 230 nm, corresponds to route Bc, and the maximum fraction of high-angle boundaries, 77%, corresponds to route A. The sizes of structure elements revealed by analysis were larger than those determined by transmission electron microscopy (TEM). The strength characteristics of oxygen-free copper after equal-channel angular pressing increase by a factor of 1.5-1.7 and remain virtually constant in the deformation range É â¼Â 6-29 for all routes. The maximum UTS and YS values correspond to route Bc. The ductility decreases after the first pass and increases after ten passes, especially for route Bc.
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Physical Sciences and Engineering
Materials Science
Materials Science (General)
Authors
S.V. Dobatkin, J.A. Szpunar, A.P. Zhilyaev, J.-Y. Cho, A.A. Kuznetsov,