Influence of annealing treatment on micro/macro-texture and texture dependent magnetic properties in cold rolled FeCo-7.15V alloy

The influence of annealing treatment on macro- and micro-texture of cold rolled FeCo-7.15V ferromagnetic ultra thin foils were studied. The microstructural studies performed by held emission scanning electron microscope (FE-SEM) showed the formation of paramagnetic precipitations ((Fe, Co)(3)V) during annealing. During cold rolling of the FeCo-7.15V magnet, the texture components of type (113)[1 (1) over bar0], (001)[1 (1) over bar0], (111)[1 (1) over bar0], and (111)[1 (2) over bar1], all related to alpha and gamma-fibers were formed. X-ray diffraction (XRD) and local texture measurements performed by electron backscatter diffraction (EBSD) were made on the annealed samples. Both methods revealed that the recrystallized samples have texture characterized by gamma fiber component, when the recovered samples were characterized by alpha fiber component. The grain boundary character distribution (GECD) and microstructures of the material were analyzed using EESD. The experimental results showed that annealing at 870 degrees C for 2 h resulted in a high frequency of twin boundaries. The maximum CSL density could reach 7.5% under annealing conditions: at 870 degrees C for 2 h. Finally, in order to investigate the texture influence on the magnetic properties, magnetic properties of the samples were measured using a vibrating sample magnetometer (VSM). The results showed an improvement in remanence induction (B-r) with the formation of hard axis < 100 >. (C) 2014 Elsevier B.V. All rights reserved