Self-organization of Cu-Ag during controlled severe plastic deformation at high temperatures
- Author(s)
- Salman N. Arshad, Timothy G. Lach, Julia Ivanisenko, Daria Setman, Pascal Bellon, Shen J. Dillon, Robert S. Averback
- Abstract
Cu
90Ag
10 alloys were subjected to severe plastic deformation at temperatures ranging from 25 to 400 °C and strain rates ranging from 0.1 to 6.25 s
-1 using high-pressure torsion. The deformed samples were characterized by x-ray diffraction, transmission electron microscopy, and atom-probe tomography. A dynamic competition between shear-induced mixing and thermally activated decomposition led to the self-organization of the Cu-Ag system at length scales varying from a few atomic distances at room temperature to ≈50 nm at 400 °C. Steady-state microstructural length scales were minimally affected by varying the strain rate, although at 400 °C, the grain morphology did depend on strain-rate. Our results show that diffusion below 300 °C is dominated by nonequilibrium vacancies, and by comparison with previous Kinetic Monte Carlo simulations [D. Schwen et al., J. Mater. Res. 28, 2687-2693 (2013)], their concentration could be obtained.
- Organisation(s)
- Physics of Nanostructured Materials
- External organisation(s)
- University of Illinois at Urbana-Champaign, Karlsruher Institut für Technologie, Lahore University of Management Sciences
- Journal
- Journal of Materials Research
- Volume
- 30
- Pages
- 1943-1956
- No. of pages
- 14
- ISSN
- 0884-2914
- DOI
- https://doi.org/10.1557/jmr.2015.119
- Publication date
- 06-2015
- Peer reviewed
- Yes
- Austrian Fields of Science 2012
- 103018 Materials physics
- Keywords
- ASJC Scopus subject areas
- Condensed Matter Physics, Mechanics of Materials, Mechanical Engineering, Materials Science(all)
- Portal url
- https://ucrisportal.univie.ac.at/en/publications/selforganization-of-cuag-during-controlled-severe-plastic-deformation-at-high-temperatures(8a5e424a-843a-40c4-944c-ea4d7ab1b6b2).html