Oxide-stabilized microstructure of severe plastically deformed CuCo alloys

• DOI: 10.1016/j.jallcom.2022.163616
• Publication Date: 2022-01-04T16:46:58Z
• Authors: Martin Stückler; Jakub Zálešák; Timo Müller; Stefan Wurster; Lukas Weissitsch; Martin Meier; Peter Felfer; Christoph Gammer; Reinhard Pippan; Andrea Bachmaier
• Keywords: Nanocrystalline material; Atom probe; Supersaturation

Nanocrystalline materials are well known for their beneficial mechanical and physical properties. However, it is of utmost importance to stabilize the microstructure at elevated temperatures broaden window application e.g. by pinning grain boundaries through impurities or oxides. CuCo alloys, severe plastically deformed using high-pressure torsion, were used investigate evolution oxides upon annealing. These investigations performed electron microscopy, synchrotron high-energy X-ray scattering atom probe tomography. Monitoring in-situ small angle indicates growth primary as formation another species oxide temperatures. Slightly different coarsening can be observed in heat-treated samples, which traced back influence amounts. The initially supersaturated matrix changes decomposition process Co- Cu-based growth. It has been found that major number present after annealing, already starting materials.