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Backscatter electron image of the PIT strand cross section after , HT. A phase contrast between reacted and nonreacted part of the tube can be seen. Scanning electron microscopy image courtesy of Arnau, CERN TS-MME.
(Color online) Diffraction peak intensity of selected peaks in (a) Cu and in (b) Nb–Ta and as a function of strand orientation with respect to the neutron beam in the reacted PIT strand. At 0° the scattering vector is in direction of the strand axis.
(Color online) Cu, Nb–Ta, and lattice constant in axial and transverse direction as a function of uniaxial tensile stress. For Cu and Nb–Ta the lattice constant has been measured for the nonheat treated and heat treated PIT strand. The Cu and Nb results for the reacted strand are magnified in insets (a) and (b). The error bars indicate a statistical error of . In axial wire position only the (440) reflection had sufficient intensity for determining the lattice spacing. In the inset in (c) the stress-strain curve obtained for the reacted PIT strand is shown (courtesy of Rehmer, BAM).
Axial and transverse and Nb–Ta lattice parameters determined using tubes extracted from the Cu matrix of the reacted PIT strand.
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