Papers by Keyword: Grazing Incidence

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Authors: E.J. MacLean, H.F.F. Millington, A.A. Neild, C.C. Tang
Authors: Hans Joachim Bunge, R. Grossterlinden, A. Haase, R. Ortega, Jerzy A. Szpunar, Paul van Houtte
Authors: T. Erbacher, Michael Ott, Tilmann Beck, Otmar Vöhringer
Abstract: Al2O3 ceramic plates of diameter 166 mm and thickness 5 mm were subjected to frictional loading regimes. The resultant residual stress effect in the material was analyzed using the sin2y and AP methods based on a modified measurement condition for the pole angle y and the azimuth angle F on a 4 cycle goniometer. Furthermore, the frictional loading of the Al2O3 plates lead to clear differences in the residual stress state near the surface. An underlying correlation was observed between the residual stress state of the Al2O3 material and its residual strength with this effect being ascribed to the magnitude of frictional load applied.
Authors: Frederico Augusto Pires Fernandes, Thomas L. Christiansen, Marcel A.J. Somers
Abstract: The present work deals with the evaluation of the residual-stress profile in expanded-austenite by successive removal steps using GI-XRD. Preliminary results indicate stresses of several GPa's from 111 and 200 diffraction lines. These stresses appear largest for the 200 reflection. The strain-free lattice parameter decayed smoothly with depth, while for the compressive stress a maximum value is observed at some depth below the surface. Additionally a good agreement was found between the nitrogen profile determined with GDOES analysis and the strain-free lattice parameter from XRD.
Authors: Matej Jergel, V. Holý, E. Majková, Š. Luby, R. Senderák, H.J. Stock, D. Menke, U. Kleineberg, U. Heinzmann
Authors: Nicholas Norberg, Arnold C. Vermeulen
Abstract: Collecting reliable data is crucial in the research of residual stresses in thin films using X-ray diffraction. The parallel beam geometry has advantage of reliability compared to focusing beam geometry. Though care must be taken to the alignment. A small alignment error may cause a significant error in the stress value. We will show the sensitivity for the misalignment of the parallel beam optics, discuss requirements on hardware alignment and demonstrate a software correction for the presence of remaining hardware errors.
Authors: H.-H. Strehblow, P. Borthen
Authors: D. Kmiec, B. Sepiol, M. Sladecek, G. Vogl, J. Korecki, T. Slezak, R. Rüffer, K. Vanormelingen, A. Vantomme
Abstract: Nuclear resonant scattering (NRS) methods allow to determine diffusion coefficients and jump directions. The capability to measure the diffusion mechanism in ordered intermetallics on atomic scale by mean of NRS was shown in various experiments and in different geometries (transmission [1,2], Bragg [3], grazing incidence [4]). A combination of NRS and grazing incidence geometry can be used as a very sensitive tool to investigate thin films or near-surface-regions [4]. Fe3Si with a D03 structure stable at high temperature and with a well known diffusion mechanism was chosen for this investigation.
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