Study of the mechanism of film condensation of vapor under the influence of surface forces

Measurements are made of local heat-transfer coefficients in the condensation of vapor with allowance for the effect of surface forces on hydrodynamics.Translated from Inzhenerno-Fizicheskii Zhurnal, Vol. 49, No. 2, pp. 189–194, August, 1985.     

Study of the Consolidation and Phase Formation in the γ-TiAl-Based Material Sintered with a TiH2 Precursor

Powder Metallurgy and Metal Ceramics - The hydride powder technique was employed to produce intermetallic TiAl alloys using a mixture of Al and TiH2 powders. The features peculiar to the...     

Measuring depth-dependent dislocation densities and Elastic strains in an indented Ni-based Superalloy

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 scattering diffraction (EBSD). Large lattice reorientations and the formation of geometrically necessary dislocations are observed in the area with a radius of ∼75 μm. A residual compression zone is found close to the indent edge. An elastic-plastic transition is observed at ∼20 μm from the indent edge. Depth dependent dislocation densities are determined at different distances from the indent edge.     

Investigation of electronic conductivity of liquid argon-nitrogen mixtures

Electron drift velocities and the electron attachment coefficients for electronegative impurities are measured in liquid argon-nitrogen mixtures. It is shown that nitrogen molecules have no electronegativity.     

Characterization and modeling of heterogeneous deformation in commercial purity titanium

Heterogeneous deformation, including local dislocation shear activity and lattice rotation, was analyzed in microstructure patches of polycrystalline commercial purity titanium specimens using three different experimental methods. The measurements were compared with crystal plasticity finite element simulations for the same region that incorporate a local phenomenological hardening constitutive model. The dislocation activity was measured using techniques associated with atomic force microscopy, confocal microscopy, three-dimensional x-ray diffraction, and nano-indentation. The results indicate that a major challenge for model development is to effectively predict conditions where slip transfer occurs, and where geometrically necessary dislocations accumulate.