One of the authors, Yu Ivanisenko, is thankful to DFG for funding support of a part of this investigation. The authors (A. Ganeev, R. Valiev, and M. Murashkin) are thankful to RFBR – 11-08-91330 for partial support of the investigation.
Grain Boundary Segregation in UFG Alloys Processed by Severe Plastic Deformation†
Article first published online: 23 MAY 2012
Copyright © 2012 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
Advanced Engineering Materials
Special Issue: Nanostructured Materials
Volume 14, Issue 11, pages 968–974, November 2012
How to Cite
Sauvage, X., Ganeev, A., Ivanisenko, Y., Enikeev, N., Murashkin, M. and Valiev, R. (2012), Grain Boundary Segregation in UFG Alloys Processed by Severe Plastic Deformation. Adv. Eng. Mater., 14: 968–974. doi: 10.1002/adem.201200060
- Issue published online: 2 NOV 2012
- Article first published online: 23 MAY 2012
- Manuscript Revised: 13 APR 2012
- Manuscript Received: 14 FEB 2012
Grain boundary (GB) segregations were investigated by atom probe tomography in an Al–Mg alloy, a carbon steel and Armco® Fe processed by severe plastic deformation (SPD). In the non-deformed state, the GBs of the aluminum alloy are Mg depleted, but after SPD some local enrichment up to 20 at% was detected. In the Fe-based alloys, large carbon concentrations were also exhibited along GBs after SPD. These experimental observations are attributed to the specific structure of GBs often described as “non-equilibrum” in ultra fine grained materials processed by SPD. The GB segregation mechanisms are discussed and compared in the case of substitutional (Mg in fcc Al) and interstitial (C in bcc Fe) solute atoms.