Thermal residual strains in depleted α-U

Lattice strains induced by cooling textured, depleted U, from 500°C to ambient temperature are measured using in situ neutron diffraction and simulated using an elastoplastic self-consistent polycrystal model. The results show that the high anisotropy of the single-crystal thermoelastic response ind...

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Bibliographic Details
Published in:Scripta materialia 2013-10, Vol.69 (8), p.566-569
Main Authors: Calhoun, C.A., Wollmershauser, J.A., Brown, D.W., Mulay, R.P., Garlea, E., Agnew, S.R.
Format: Article
Language:English
Subjects:
Crystal plasticity
Neutron diffraction
Residual stress
Thermal expansion
α-Uranium
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Summary:Lattice strains induced by cooling textured, depleted U, from 500°C to ambient temperature are measured using in situ neutron diffraction and simulated using an elastoplastic self-consistent polycrystal model. The results show that the high anisotropy of the single-crystal thermoelastic response induces thermal stresses sufficient to cause plastic relaxation. Incorporation of ½〈11¯0〉{110} slip enables modeling of the observed internal strain evolution, although diffusional effects may also contribute to the observed relaxation.
ISSN:1359-6462
1872-8456
DOI:10.1016/j.scriptamat.2013.06.004