Search Results - "Thoma, D J"

Machine learning enhanced analysis of EBSD data for texture representation by Wanni, J., Bronkhorst, C. A., Thoma, D. J.

“…Generating reduced-order, synthetic grain structure datasets that accurately represent the measured grain structure of a material is important for reducing the…”
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Metallographic preparation techniques for U―6 wt.%Nb by KELLY, A. M, FIELD, R. D, THOMA, D. J

“…A new metallographic preparation technique has been developed for uranium-niobium (U-Nb) alloys. The technique uses a single methodology to optimally elucidate…”
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Crystallographic and kinetic origins of acicular and banded microstructures in U–Nb alloys by Field, R.D., Thoma, D.J.

“…► Detailed study of transition from acicular to banded microstructure near U–5at.%Nb composition. ► Dilatometry provides insight into mechanisms for the change…”
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Critical examination of heat capacity measurements made on a Quantum Design physical property measurement system by Lashley, J.C., Hundley, M.F., Migliori, A., Sarrao, J.L., Pagliuso, P.G., Darling, T.W., Jaime, M., Cooley, J.C., Hults, W.L., Morales, L., Thoma, D.J., Smith, J.L., Boerio-Goates, J., Woodfield, B.F., Stewart, G.R., Fisher, R.A., Phillips, N.E.

“…We examine the operation and performance of an automated heat-capacity measurement system manufactured by Quantum Design (QD). QD’s physical properties…”
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EBSD and FIB/TEM examination of shape memory effect deformation structures in U–14 at.% Nb by Clarke, A.J., Field, R.D., McCabe, R.J., Cady, C.M., Hackenberg, R.E., Thoma, D.J.

“…Detailed examinations of shape memory effect (SME) deformation structures in martensite of U–14 at.% Nb were performed with electron backscatter diffraction…”
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Low temperature age hardening in U–13 at.% Nb: An assessment of chemical redistribution mechanisms by Clarke, A.J., Field, R.D., Hackenberg, R.E., Thoma, D.J., Brown, D.W., Teter, D.F., Miller, M.K., Russell, K.F., Edmonds, D.V., Beverini, G.

“…Low temperature aging (<350 °C) of U–13 at.% Nb martensite results in increased strength levels accompanied by significant ductility loss. To determine the…”
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X-ray diffraction analyses of aged U–Nb alloys by Volz, H.M., Hackenberg, R.E., Kelly, A.M., Hults, W.L., Lawson, A.C., Field, R.D., Teter, D.F., Thoma, D.J.

“…An aging study of compositionally homogeneous U–5.6Nb and U–7.7Nb (wt.%) was undertaken to improve the understanding of the decomposition of metastable…”
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Hydrogen embrittlement of additively manufactured austenitic stainless steel 316 L by Bertsch, K.M., Nagao, A., Rankouhi, B., Kuehl, B., Thoma, D.J.

“…Additive manufacturing (AM) is a promising means of production of austenitic stainless steel (SS) parts for hydrogen service. The hydrogen embrittlement…”
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Texture development and deformation mechanisms during uniaxial straining of U-Nb shape-memory alloys by Field, R. D., Brown, D. W., Thoma, D. J.

“…The shape-memory effect is well documented in uranium-niobium alloys near the α″-γ o metastable phase boundary. In situ neutron diffraction measurements during…”
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Texture development and deformation mechanisms during uniaxial straining of U-Nb shape-memory alloys by Field, R. D., Brown, D. W., Thoma, D. J.

“…The shape-memory effect is well documented in uranium-niobium alloys near the α″-γ o metastable phase boundary. In situ neutron diffraction measurements during…”
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Neutron diffraction study of the deformation mechanisms of the uranium–7 wt.% niobium shape memory alloy by Brown, D.W., Bourke, M.A.M., Field, R.D., Hults, W.L., Teter, D.F., Thoma, D.J., Vogel, S.C.

“…The shape memory effect (SME) has been reported in the uranium–niobium alloy system in the region of the phase diagram surrounding U–6.5 wt.% Nb. In this…”
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Intrinsically localized vibrations and the mechanical properties of α-uranium by Manley, M.E., Yethiraj, M., Sinn, H., Volz, H.M., Alatas, A., Lashley, J.C., Hults, W.L., Lander, G.H., Thoma, D.J., Smith, J.L.

“…Recent experiments have indicated that the high-temperature properties of α-uranium may be strongly influenced by the formation of randomly distributed…”
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Uniaxial tensile deformation of uranium 6 Wt Pct niobium : A neutron diffraction study of deformation twinning by BROWN, D. W, BOURKE, M. A. M, DUNN, P. S, FIELD, R. D, STOUT, M. G, THOMA, D. J

“…The deformation of polycrystalline uranium 6 wt pct niobium (U6Nb) was studied in situ during uniaxial tensile loading by time-of-flight neutron diffraction…”
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Spall damage mechanisms in laser powder bed fabricated stainless steel 316L by Koube, K.D., Kennedy, G., Bertsch, K., Kacher, J., Thoma, D.J., Thadhani, N.N.

“…This paper reports on spall damage mechanisms in laser powder bed fusion (LPBF) fabricated stainless steel 316L (SS316L) subjected to uniaxial, strain…”
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Experimental validation and microstructure characterization of topology optimized, additively manufactured SS316L components by Rankouhi, B., Bertsch, K.M., Meric de Bellefon, G., Thevamaran, M., Thoma, D.J., Suresh, K.

“…The integration of topology optimization (TO) and additive manufacturing (AM) has the potential to revolutionize modern design and manufacturing. However, few…”
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Influence of solidification structures on radiation-induced swelling in an additively-manufactured austenitic stainless steel by Meric de Bellefon, G., Bertsch, K.M., Chancey, M.R., Wang, Y.Q., Thoma, D.J.

“…Metal additive manufacturing offers potential advantages for producing structural materials, such as austenitic stainless steels, in nuclear power systems…”
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Large harmonic softening of the phonon density of states of uranium by Manley, M E, Fultz, B, McQueeney, R J, Brown, C M, Hults, W L, Smith, J L, Thoma, D J, Osborn, R, Robertson, J L

“…Phonon density-of-states curves were obtained from inelastic neutron scattering spectra from the three crystalline phases of uranium at temperatures from 50 to…”
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Directed light fabrication of a solid metal hemisphere using 5-axis powder deposition by Milewski, J.O, Lewis, G.K, Thoma, D.J, Keel, G.I, Nemec, R.B, Reinert, R.A

“…Directed light fabrication (DLF) is a direct metal deposition process that fuses metal powders, delivered by gas into the focal zone of a high-powered laser…”
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Mo5Si3 single crystals : physical properties and mechanical behavior by CHU, F, THOMA, D. J, MCCLELLAN, K. J, PERALTA, P

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A geometric analysis of solubility ranges in Laves phases by Thoma, D.J., Perepezko, J.H.

“…Laves phases nominally occur at the AB2 stoichiometry but can exhibit a range of solubility involving non-stoichiometric compositions in binary alloys. The…”
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