The directly measured lattice strains in Ti grains are largely consistent with the external loading, whereas those in Al grains are in contradiction with the external loading. The directly measured lattice strains also show large spatial variations, although the magnitude of this variation is smaller than that for the estimated deviatoric strain. The estimated deviatoric strains show large spatial variations, and the mean values are consistent with the external loading conditions, i.e., increasing tensile strain along the tensile direction more » and increasing compressive strain along the sample normal with increasing loading. For both Al and Ti grains, deviatoric elastic strains were estimated based on polychromatic X-ray microbeam diffraction, while lattice strains along the normal direction of the tensile sample were directly measured using monochromatic X-ray microbeam diffraction.
Spatially resolved elastic strains in the bulk interior of a laminated Ti-Al metal composite were studied during in situ tensile loading at strains up to 1.66% by a synchrotron-based micro-diffraction technique, namely differential aperture X-ray microscopy (DAXM). The applied uniaxial load was measured as an increase in the deviatoric tensile strain parallel to the load axis. A basal (0002) orientation was identified in the as-rolled annealed alloy after tensile loading some grains were observed to undergo an orientation change of 30 deg. To highlight the system potential the grain orientation and strain distribution of individual grains in a polycrystalline magnesium alloy (Mg 0.2 wt % Nd) was mapped before and after tensile loading.
#Von laue x ray diffraction software
Utilizing the polychromatic nature of the incident x-ray beam and application of the Laue indexing software package X-Ray Micro-Diffraction Analysis Software, the orientation more » and deviatoric strain of single grains in a polycrystalline material can be studied. Measurement of the capillary performance, indicated a beam divergence of 14 mrad and a useable energy bandpass from 5.5 to 19 keV. The beam profile generated by the ellipsoidal capillary was determined using the ''knife edge'' approach. The applied uniaxial load was measured as an increase in the deviatoric tensile strain parallel to the load axis (37 = m beam was developed. A basal (0002) orientation was identified in the as-rolled annealed alloy after tensile loading some grains were observed to undergo an orientation change of 30 degrees with respect to (0002). To highlight the system potential the grain orientation and strain distribution of individual grains in a polycrystalline magnesium alloy (Mg 0.2 wt percent Nd) was mapped before and after tensile loading. Utilizing the polychromatic nature of the incident x-ray beam and application of the Laue indexing software package X-Ray Micro-Diffraction Analysis Software, the orientation and deviatoric strain of single grains in a polycrystalline material can be studied. The beam profile generated by the ellipsoidal capillary was determined using the"knife edge" approach. Using a microfocus x-ray source equipped with a tungsten anode and prefigured monocapillary optic, a micro-x-ray diffraction system with a 10 mum beam was developed. A laboratory diffraction system capable of illuminating individual grains in a polycrystalline matrix is described.
0 kommentar(er)
