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4 citations found for Brand, P.
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research papers
research papers
Adequate alignment of instrumentation and specimens is imperative for the successful performance of residual-stress measurements by means of neutron diffraction. This paper presents a number of alignment methods that enable the user to align reproducibly a stress-measurement setup and a specimen positioned therein. Most of these methods employ the position and the direction of the incident neutron beam as their primary source of geometric reference. A mathematical description for each of the proposed alignment steps is given, which makes the alignment quantitative and enables quantitative assessment of the alignment quality after each alignment step. Examples from actual practice show that the alignment quality that can be achieved using these methods is better than 0.05 mm for translations and better than 0.05° for rotations.
research papers
A method that allows the calculation of single-crystal elastic constants from the diffraction elastic constants is presented. Values for the diffraction elastic constants have been obtained from diffraction measurements on polycrystals.
research papers
Cold pressing of virgin copper single-crystal discs introduces anisotropy. Characterization by neutron diffraction shows that the twofold symmetry of the mosaic width of the pressed crystal is modulated by the 2π periodicity introduced by the precession of the reciprocal-lattice vector around the crystal face normal.
