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In this study, fatigue behaviors of pure copper with different grain sizes are investigated under cyclic tension–compression and torsion loadings. The fatigue responses of ultrafine-grained (UFG) Cu subjected to equal-channel angular pressing (ECAP) are compared and contrasted with those of coarse-grained (CG) and cold-rolled (CR) Cu. It is found from the S–N curves under the two different loading...
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