Title :
The Effects of Nano-Sized Defects on the Magnetic Properties in Thermal Aged Fe–Cu Alloys
Author :
Duck-Gun Park ; Kishore, M.B. ; Kyung-Ho Kim ; Lee, N.H. ; Lee, D.H. ; Kobayashi, S. ; Son, Derac
Author_Institution :
Nucl. Mater. Div., Korea Atomic Energy Res. Inst., Daejeon, South Korea
Abstract :
We evaluated the changes in magnetic properties due to cold rolling and thermal aging of a Fe-1%Cu model alloy in this paper. First, the alloy was 10% cold rolled, and isothermally aged at 753 K for 20, 200, and 1800 min. The hysteresis loops, magnetic Barkhausen noise, and Vickers micro hardness were measured, and the results are interpreted using the small angle neutron scattering measurement. The change of magnetic and mechanical properties can be interpreted in terms of the domain wall motion and dislocation dynamics associated with copper rich precipitates. The results were interpreted in terms of aging time dependence of the precipitates evolution, such as the volume fraction and size distribution.
Keywords :
Barkhausen effect; Vickers hardness; ageing; cold rolling; copper alloys; dislocations; iron alloys; magnetic domain walls; magnetic hysteresis; microhardness; nanofabrication; nanomagnetics; nanostructured materials; neutron diffraction; precipitation (physical chemistry); FeCu; Vickers microhardness; aging time dependence; cold rolling; copper-rich precipitates; dependence; dislocation dynamics; domain wall motion; hysteresis loops; isothermal ageing; magnetic Barkhausen noise; magnetic properties; mechanical properties; nanosized defect effects; size distribution; small angle neutron scattering measurement; temperature 753 K; thermal aged Fe-Cu alloys; time 1800 min; time 20 min; time 200 min; volume fraction; Aging; Coercive force; Copper; Magnetic domain walls; Magnetic domains; Magnetic properties; Barkhausen noise (BN); Fe???Cu alloy; Vickers micro hardness; copper precipitates; hysteresis loop (HL); small angle neutron scattering (SANS);
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2014.2327222
