|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Pan American Materials Congress: Nanocrystalline and Ultra-fine Grain Materials and Bulk Metallic Glasses
||Effect of Annealing on Microstructure and Magnetic Properties of Nanocrystalline Metastable Cu-Co Solid Solutions
||Andrea Bachmaier, Stefan Hartl, Jörg Schmauch, Hisham Aboulfadl, Andreas Verch, Heinz Krenn, Reinhard Pippan
|On-Site Speaker (Planned)
Nanocrystalline metastable Cu74Co26 solid solutions, which are processed by high-pressure torsion deformation of immiscible dual-phase Cu-Co composites, decompose during annealing at 400°C. A detailed study of the as-processed and annealed nanostructures by transmission electron microscopy and atom probe tomography reveals a compositionally modulated structure inside the grains. Near grain boundaries, alternating nanometer-sized pure fcc Cu and Co phases with a larger length scale are found. Both, the size as well as the composition of the Cu and Co regions can be influenced by the annealing time. The magnetic properties of the as-deformed and annealed structures are investigated by SQUID-magnetography and associated with the evolving nanostructures. Additionally, the hysteresis loop is measured on ring shaped samples. Another promising way to modify the microstructure and tune the magnetic properties is magnetic annealing. Hence, the microstructural evolution during annealing has been further studied in the presence of a strong magnetic field.
||Planned: Stand-alone book in which only your symposium’s papers would appear (indicate title in comments section below)