Title of article :
Synchrotron diffraction study of dissolution and precipitation kinetics of hydrides in Zircaloy-4
Author/Authors :
Zanellato، نويسنده , , O. and Preuss، نويسنده , , M. and Buffiere، نويسنده , , J.-Y. and Ribeiro، نويسنده , , F. and Steuwer، نويسنده , , A. and Desquines، نويسنده , , J. and Andrieux، نويسنده , , J. and Krebs، نويسنده , , B.، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2012
Pages :
11
From page :
537
To page :
547
Abstract :
This paper presents observations of in situ heating and cooling cycles using synchrotron X-ray diffraction carried out on Zircaloy-4 plates charged to different levels of hydrogen content. The diffraction peak intensities were used to derive the weight fraction of hydrogen in solid solution and the solvi curves upon dissolution and precipitation. The heating and cooling rate did not seem to have a major influence on the solvi. Fast-cooling/dwell experiments showed that the precipitation kinetics are very fast. Finally the evolutions of the lattice strains from individual grain families were studied during dissolution and precipitation. The aim was to understand the role of interphase misfit stresses on the mechanisms of hydride formation and hysteresis between dissolution and precipitation. The results emphasise that changes in dissolved H concentration are responsible for a non-negligible part of the lattice distortion in the matrix, and that the diffraction strains must therefore be analysed with care.
Journal title :
Journal of Nuclear Materials
Serial Year :
2012
Journal title :
Journal of Nuclear Materials
Record number :
1359895
Link To Document :
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