%0 journal article
%@ 1359-6462
%A Todt, J.,Keckes, J.,Winter, G.,Staron, P.,Hohenwarter, A.

%D 2018
%J Scripta Materialia
%N 
%P 178-181 
%R doi:10.1016/j.scriptamat.2017.11.037
%T Gradient residual strain and stress distributions in a high pressure torsion deformed iron disk revealed by high energy X-ray diffraction
%U https://doi.org/10.1016/j.scriptamat.2017.11.037
 
%X High energy X-ray diffraction is used to investigate for the first time the distribution of residual X-ray elastic stresses inside a high pressure torsion (HPT) deformed iron disk with a diameter and thickness of ~ 30 and ~ 8 mm, respectively. In the experiment, a dedicated conical slit system restricts the diffraction gauge volume in three dimensions to ~ 0.45 mm3, which is then used to scan the bulk sample cross-section in a non-invasive manner. Pronounced residuals stress gradients with maximal tensile stresses of ~ 200 MPa are observed along radial and tangential directions and are correlated to the deformation gradient arising from HPT.