Microstructure and mechanical properties of ultrafine grained copper processes by multiple isothermal forging

M.I. Nagimov1, A.A. Nazarov1, O. Saray2*, G. Purcek3§, O.R. Valiakhmetov1, I.M. Safarov1, R.R. Mulyukov1Δ
1Institute for Metals Superplasticity Problems, Russian Academy of Sciences, 39 Khalturin str., 450001 Ufa
2Karadeniz Technical University, Dept. of Mechanical Engineering, 61080 Trabzon, Turkey
3Karadeniz Technical University, Dept. of Mechanical Engineering, 61080-Trabzon, Turkey
Microstructure and mechanical properties of ultrafine grained (UFG) Cu processed by multiple isothermal forging (MIF) are studied and compared to those after processing by equal channel angular pressing (ECAP). It is shown that when the final temperature of MIF and the temperature of ECAP are the same, similar microstructures and mechanical properties are obtained in this material. While MIF allows for obtaining reasonably small grain sizes in the submicrometer range in large scale samples, ECAP allows for processing smaller grain sizes in smaller samples.
Received: 04 October 2011   Revised: 12 October 2011   Accepted: 13 October 2011
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