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Large Strain Deformation in Uranium 6 Wt Pct Niobium

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Abstract

The large strain deformation of polycrystalline uranium 6 wt pct niobium (U6Nb) was studied in situ during uniaxial tensile and compressive loading by time-of-flight neutron diffraction. Diffraction patterns were recorded at incremental strains to a maximum of approximately 0.13 tensile and 0.15 compressive true strain. A discrete reorientation of the crystallographic texture under tensile straining between 0.04 and 0.08 true strain is consistent with a previously unobserved mechanical deformation twinning mechanism, identified as either a (100) or (010) mechanical twin system. Beyond this, a continuous texture reorientation towards an (010) crystal orientations indicates that a slip mechanism is likely predominant. An analogous mechanical twin system was not observed in compression at large strain.

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Acknowledgments

This work has benefited from the use of the Manual Lujan, Jr. Neutron Scattering Center, LANSCE, which is funded by the United States Department of Energy’s Office of Basic Energy Sciences. The Los Alamos National Laboratory is operated by Los Alamos National Security LLC under Department of Energy Contract No. DE-AC52-06NA25396.

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Author notes

  1. Catherine N. Tupper (Doctoral Candidate)

    Present address: The Materials Science and Engineering Department, Northwestern University, Evanston, IL, 60208, USA

Authors and Affiliations

  1. Los Alamos National Laboratory, Los Alamos, NM, 87545, USA

    Catherine N. Tupper (Doctoral Candidate)

  2. LANSCE, Los Alamos National Laboratory, Los Alamos, NM, 87545, USA

    Don W. Brown (Technical Staff), Robert D. Field (Technical Staff), Thomas A. Sisneros (Technical Staff) & Bjorn Clausen (Technical Staff)

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  1. Catherine N. Tupper
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  2. Don W. Brown
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Corresponding author

Correspondence to Don W. Brown.

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Manuscript submitted May 3, 2010.

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Tupper, C.N., Brown, D.W., Field, R.D. et al. Large Strain Deformation in Uranium 6 Wt Pct Niobium. Metall Mater Trans A 43, 520–530 (2012). https://doi.org/10.1007/s11661-011-0931-5

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