Modeling Leidenfrost levitation of soft elastic solids [PDF]
Physical Review Letters 131, 168201 (2023), 2022 The elastic Leidenfrost effect occurs when a vaporizable soft solid is lowered onto a hot surface. Evaporative flow couples to elastic deformation, giving spontaneous bouncing or steady-state floating. The effect embodies an unexplored interplay between thermodynamics, elasticity, and lubrication: despite being observed, its basic theoretical ...
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Porosity dependence of powder compaction constitutive parameters: Determination based on spark plasma sintering tests [PDF]
Scripta Materialia, Elsevier, 2017, 141, pp.62-66, 2020 The modeling of powder compaction process, such as spark plasma sintering (SPS), requires the determination of the visco-plastic deformation behavior of the particle material including the viscosity moduli. The establishment of these parameters usually entails a long and difficult experimental campaign which in particular involves several hot isostatic
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Thermal Shear Waves induced in Mesoscopic Liquids at Low Frequency Mechanical Deformation [PDF]
, 2022 We show that a viscous liquid confined between two low thermal conductive surfaces (Al2O3) emit a thermal response upon applying a low frequency (Hz) shear excitation. Hot and cold thermal waves are observed in situ at atmospheric pressure and room temperature, in polypropylene glycol layers of various thicknesses ranging from 100 microns up to 340 ...
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Frequency deviations in universal relations of isolated neutron stars and postmerger remnants [PDF]
Phys. Rev. D 104, 043011 (2021), 2021 We relate the fundamental quadrupolar fluid mode of isolated non-rotating NSs and the dominant oscillation frequency of neutron star merger remnants. Both frequencies individually are known to correlate with certain stellar parameters like radii or the tidal deformability, which we further investigate by constructing fit formulae and quantifying the ...
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Failure behaviors and processing maps with failure domains for hot compression of a powder metallurgy Ni-based superalloy [PDF]
arXiv, 2022 Processing maps are key to guiding the thermo-mechanical processing (TMP) of superalloys. However, traditional processing maps are incapable of delimiting failure, which is an essential factor to be concerned about during the TMP of superalloys. Employing isothermal hot compression experiments and finite element analysis (FEA), the present study ...
arxiv
Rare earth permanent magnets prepared by hot deformation process [PDF]
, 2018 Hot deformation process is one of the primary methods to produce anisotropic rare earth permanent magnets. Firstly, rapidly quenched powder flakes with nanocrystal structure are condensed into the full dense isotropic precursors by hot pressing process.
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Transient behavior of the thermocapillary migration of drops under the influence of deformation [PDF]
, 2011 The transient thermocapillary migration of drops with nontrivial deformation is studied. The finite difference method is employed to solve the incompressible Navier-Stokes equations coupled with the energy equation; the front-tracking method is adopted to track the moving deformable drop interface. In the hot region, deformations of drops increase with
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Evidence of large nuclear deformation of $^{32}$S$^{*}$ formed in $^{20}$Ne + $^{12}$C reaction [PDF]
Phys.Rev. C74 (2006) 044605, 2006 Deformations of hot composite $^{32}$S$^{*}$ formed in the reaction $^{20}$Ne ($\sim$ 7 -- 10 MeV/nucleon) + $^{12}$C have been estimated from the respective inclusive $\alpha$-particle evaporation spectra. The estimated deformations for $^{32}$S$^{*}$ have been found to be much larger than the `normal' deformations of hot, rotating composites at ...
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Superplasticity-like behavior of ultrafine-grained austenitic steel 321 [PDF]
arXiv, 2023 Hot rolled commercial metastable austenitic steel 321 with strongly elongated thin delta-ferrite particles in its microstructure was the object of investigations. Ultrafine-grained (UFG) microstructure in steel 321 was formed by Equal Channel Angular Pressing (ECAP) at 150 oC and 450 oC.
arxiv
Phonon spectral functions of photo-generated hot carrier plasmas: effects of carrier screening and plasmon-phonon coupling [PDF]
, 2016 We investigate spectral behavior of phonon spectral functions in an interacting multi-component hot carrier plasma. Dielectric polarization functions are formulated so that they satisfy Dyson equations of the effective interactions among plasma components.
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