Search Results - "Barabash, R.I"

A tale of two mechanisms: Strain-softening versus strain-hardening in single crystals under small stressed volumes by Bei, H., Xia, Y.Z., Barabash, R.I., Gao, Y.F.

“…[Display omitted] Pre-straining defect-free single crystals will introduce heterogeneous dislocation nucleation sources that reduce the measured strength from…”
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X-ray microdiffraction and strain gradient crystal plasticity studies of geometrically necessary dislocations near a Ni bicrystal grain boundary by Ohashi, Tetsuya, Barabash, R.I., Pang, J.W.L., Ice, G.E., Barabash, O.M.

“…We compare experimental measurements of inhomogeneous plastic deformation in a Ni bicrystal with crystal plasticity simulations. Polychromatic X-ray…”
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Phase-specific elastic/plastic interface interactions in layered NiAl–Cr(Mo) structures by Barabash, R.I., Liu, W., Tischler, J.Z., Bei, H., Budai, J.D.

“…The depth-dependent, as-grown and deformation-induced strain and dislocations partitioned through the interfaces in a two-phase layered NiAl–Cr(Mo) structure…”
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Interface strength in NiAl–Mo composites from 3-D X-ray microdiffraction by Barabash, R.I., Bei, H., Gao, Y.F., Ice, G.E.

“…► Strain gradients in NiAl–Mo composite were probed with 3D X-ray microdiffraction. ► Residual strains relaxation results in the formation of a near-surface…”
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Polychromatic microdiffraction analysis of defect self-organization in shock deformed single crystals by Barabash, R.I., Ice, G.E., Kumar, M., Ilavsky, J., Belak, J.

“…A spatially resolved X-ray diffraction method – with a submicron 3D resolution together with SEM and OIM analysis are applied to understand the arrangements of…”
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Characterization of three-dimensional crystallographic distributions using polychromatic X-ray microdiffraction by Ice, G.E., Pang, J.W.L., Barabash, R.I., Puzyrev, Y.

“…Polychromatic microdiffraction uses small X-ray beams to characterize the local crystallographic structure of materials. When combined with a depth resolving…”
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Quantitative characterization of electromigration-induced plastic deformation in Al(0.5wt%Cu) interconnect by Barabash, R.I, Ice, G.E, Tamura, N, Valek, B.C, Bravman, J.C, Spolenak, R, Patel, J.R

“…Electromigration-induced failure in metal interconnect constitutes a major reliability problem in the semiconductor industry. Recently, experimental techniques…”
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Three-dimensional local residual stress and orientation gradients near graphite nodules in ductile cast iron by Zhang, Y.B., Andriollo, T., Fæster, S., Liu, W., Hattel, J., Barabash, R.I.

“…A synchrotron technique, differential aperture X-ray microscopy (DAXM), has been applied to characterize the microstructure and analyze the local mesoscale…”
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Experimental Characterization and Crystal Plasticity Modeling of Heterogeneous Deformation in Polycrystalline α-Ti by Wang, L., Barabash, R.I., Yang, Y., Bieler, T.R., Crimp, M.A., Eisenlohr, P., Liu, W., Ice, G.E.

“…Grain-level heterogeneous deformation was studied in a polycrystalline α -Ti specimen deformed by four-point bending. Dislocation slip activity in the…”
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Intergranular strain evolution near fatigue crack tips in polycrystalline metals by Zheng, L.L., Gao, Y.F., Lee, S.Y., Barabash, R.I., Lee, J.H., Liaw, P.K.

“…The deformation field near a steady fatigue crack includes a plastic zone in front of the crack tip and a plastic wake behind it, and the magnitude,…”
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Characterization of Nano and Mesoscale Deformation Structures with Intense X-ray Synchrotron Sources by Ice, G.E., Barabash, R.I., Walker, F.J.

“…Advanced polychromatic microdiffraction is sensitive to the organization of dislocations and other defects that rotate the lattice planes. Using…”
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Indentation-induced localized deformation and elastic strain partitioning in composites at submicron length scale by Barabash, R.I., Bei, H., Gao, Y.F., Ice, G.E.

“…Three-dimensional spatially resolved strains were mapped in a model NiAl/Mo composite after nanoindentation. The depth-dependent strain distributed in the two…”
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Twin boundary-induced intrinsic strengthening in Ni by Barabash, R.I., Rollett, A., Lebensohn, R.A., Barabash, O.M., Liu, W., Pang, J.W.L.

“…The manuscript presents a combined experimental/simulation study of the intrinsic strengthening of the material near twin boundaries. Polychromatic X-ray micro…”
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Measuring depth-dependent dislocation densities and Elastic strains in an indented Ni-based Superalloy by Barabash, O. M., Santella, M., Barabash, R. I., Ice, G. E., Tischler, J.

“…The indentation-induced elastic-plastic zone in an IN 740 Ni-based superalloy was studied by three-dimensional (3-D) x-ray microdiffraction and electron back…”
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Mapping strain gradients in the FIB-structured InGaN/GaN multilayered films with 3D X-ray microbeam by Barabash, R.I., Gao, Y.F., Ice, G.E., Barabash, O.M., Chung, Jin-Seok, Liu, W., Kröger, R., Lohmeyer, H., Sebald, K., Gutowski, J., Böttcher, T., Hommel, D.

“…This research presents a combined experimental-modeling study of lattice rotations and deviatoric strain gradients induced by focused-ion beam (FIB) milling in…”
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Gradients of geometrically necessary dislocations from white beam microdiffraction by Barabash, R.I., Ice, G.E., Pang, J.W.L.

“…Variations in the local crystallographic orientation due to the presence of geometrically necessary dislocations and dislocation boundaries smear the…”
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Neutron and X-ray Microbeam Diffraction Studies around a Fatigue-Crack Tip after Overload by Lee, S.Y., Barabash, R.I., Chung, J.-S., Liaw, P.K., Choo, H., Sun, Y., Fan, C., Li, L., Brown, D.W., Ice, G.E.

“…An in-situ neutron diffraction technique was used to investigate the lattice-strain distributions and plastic deformation around a crack tip after overload…”
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Diffuse X-ray scattering measurements of point defects and clusters in iron by Stoller, R.E., Walker, F.J., Specht, E.D., Nicholson, D.M., Barabash, R.I., Zschack, P., Ice, G.E.

“…The nature of residual damage from atomic displacement cascades in iron has been investigated by diffuse X-ray scattering. A single crystal iron sample was…”
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Characterization of nano and meso scale deformation structures with intense X-ray synchrotron sources by Ice, G.E., Barabash, R.I., Walker, F.J.

“…Advanced polychromatic microdiffraction is sensitive to the organization of dislocations and other defects that rotate the lattice planes. Using…”
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