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

Hasani, S ; Sharif University of Technology | 2015

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  1. Type of Document: Article
  2. DOI: 10.1016/j.jmmm.2014.11.050
  3. Publisher: Elsevier , 2015
  4. Abstract:
  5. The influence of annealing treatment on macro- and micro-texture of cold-rolled FeCo-7.15V ferro-magnetic ultra-thin foils were studied. The microstructural studies performed by field emission scanning electron microscope (FE-SEM) showed the formation of paramagnetic precipitations ((Fe, Co)3V) during annealing. During cold rolling of the FeCo-7.15V magnet, the texture components of type (113)[110], (001)[110], (111)[110], and (111)[121], all related to α and γ-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 γ fiber component, when the recovered samples were characterized by α fiber component. The grain boundary character distribution (GBCD) and microstructures of the material were analyzed using EBSD. The experimental results showed that annealing at 870°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°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 (Br) with the formation of hard axis 〈100〉
  6. Keywords:
  7. FeCo-V alloys ; Misorientation ; Texture ; Annealing ; Cold rolling ; Grain boundaries ; Magnetic properties ; Magnetism ; Metal cladding ; Scanning electron microscopy ; X ray diffraction ; EBSD ; Electron back scatter diffraction ; Field emission scanning electron microscopes ; Grain boundary character distributions ; Recrystallized samples ; Vibrating sample magnetometer ; VSM ; Vanadium alloys
  8. Source: Journal of Magnetism and Magnetic Materials ; Volume 378 , March , 2015 , Pages 253-260 ; 03048853 (ISSN)
  9. URL: http://www.sciencedirect.com/science/article/pii/S0304885314011585