Bulk Texture Measurement of Interstitial-Free Annealed Steel Using Gaussian Integrated Intensities of Neutron Diffraction Spectra

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  • Xu P. G.
    Graduate School of Science and Engineering, Ibaraki University
  • Tomota Y.
    Graduate School of Science and Engineering, Ibaraki University
  • Suzuki H.
    Quantum Beam Science Directorate, Japan Atomic Energy Agency
  • Suzuki T.
    Faculty of Engineering, Ibaraki University
  • Machiya S.
    Quantum Beam Science Directorate, Japan Atomic Energy Agency
  • Yin F. X.
    Innovative Materials Engineering Lab., National Institute for Materials Science

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{110}, {200} and {211} neutron diffraction profiles of an interstitial-free annealed steel sheet were measured on 5×5 degrees stereographic angle grids, and several evaluation methods of diffraction intensity were employed to calculate the bulk texture, including the peak intensity at a constant 2theta angle, the simply summed intensity in a constant 2theta angle spread and the Gaussian integrated intensity obtained by single peak fitting of each profile. The comparison among differently evaluated bulk textures shows that a stronger {111}⟨uvw⟩ fiber component and a weaker {001}⟨110⟩ rotated cube component appear in the texture of investigated steel and the Gaussian integrated intensity method with proper coefficient constraints possesses a higher sensitivity to both weak texture components and strong ones. The crystallographic orientation maps obtained from electron backscattering diffraction and the bulk textures estimated from X-ray diffraction confirm the feasibility of the neutron bulk texture based on the Gaussian integrated intensity, suggesting that it can be suitably utilized to evaluate the global orientation distribution characteristics of heterogeneous materials.

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