EBSD study of angular deviations from the Goss component in grain-oriented electrical steels.
The magnetic properties of grain-oriented (GO) electrical steels strongly depend on the distribution of the α and β angles, i.e., the deviations of the easy magnetisation <100> from the rolling direction (RD) in the rolling plane and out of the rolling plane, respectively. However, most Electron Backscatter Diffraction (EBSD) studies consider the standard Goss deviation angle, which includes the rotation of the (110) plane about the RD. Therefore, in the present work, a new procedure is demonstrated for deriving the α and β angles from EBSD mappings to obtain a quantitative texture characterisation in line with the magnetic properties. This procedure is later applied to 37 GO steels after secondary recrystallisation that exhibit a wide range of permeability levels. The relation between the texture and the polarisation at 800A/m (J800) that is measured in the present study by EBSD is compared to the one that has been determined in previous papers with optical goniometers and X-ray diffraction techniques, and this relation is subsequently used to define a relevant parameter to describe the orientation quality of the grains. The results indicate that the average angle of the α and β deviations is a relevant deviation parameter for the characterisation of grain orientations. Finally, it is demonstrated that the combination of the quantitative correlation between polarisation and texture with the orientation imaging of EBSD offers the possibilities of both studying the crystallographic environment of highly oriented grains in the primary recrystallised matrix for the production of high-permeability steels and evaluating the spatial distribution of the angular deviations in GO steels after secondary recrystallisation.
Effect of Hot Deformation Temperature on Texture Formation Regularity of CGO Silicon Steel under High Deformation Rate
The influence of hot deformation temperature on microstructure and texture of CGO silicon steel under the condition of a high deformation rate (100 ) was studied by SEM and EBSD techniques. The results indicate that the typical microstructures at room temperature consist of ferrite and pearlite under different hot deformation temperatures. The higher deformation temperature is beneficial to obtain a more uniform recrystallization microstructure and lower pearlite content. Cubic texture and rotated cubic texture are dominant texture components in the tested steels, and texture in γ fiber is also strong, the intensity of which is higher than that of texture. Goss texture is weak. With the rising of the hot deformation temperature, texture decreases firstly and then increases at 1100°C. When the hot deformation temperature raises from 800°C to 900°C, texture shows an increasing trend, while texture content is stable. When the temperature further increases to 1100°C and 1150°C, and textures are slightly weakened.
The politics of becoming bodies: Sex, gender and intersubjectivity in motion
Abstract This paper presents readers with one (research) story about (sexed and gendered) bodies not as objects with inherent boundaries and properties but as material-discursive phenomena. In telling such a story I examine the role that the screendance, Becoming Bodies , has played in knowledge production and argue for a less ontologically ‘old fashioned’ view of what counts as ‘evidence’. Throughout the paper I draw from a range of feminisms: biological, phenomenological, poststructural, psychoanalytical, and post humanist and performative scholarship of sex and gender. These discourses contest nature/nurture, male/female, body/mind dualisms, and take the political and ethical view that bodies are not neutral; that sex and gender, being a woman or a man are both socially and biologically constructed forms of identity (similar to class and race) that are acquired and learned through socio-cultural regimes of discipline and intersubjective bodily practices. Building on this dynamic and developmental bio-psycho-social view I discuss selected aspects of interview data: (1) the material-discursive tensions and contradictions of sexing and gendering bodies and (2) troubling the intersubjective implications of this for clinical practices.