The Experts below are selected from a list of 105 Experts worldwide ranked by ideXlab platform
J Polak - One of the best experts on this subject based on the ideXlab platform.
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afm and tem study of cyclic slip localization in fatigued ferritic x10cral24 stainless steel
Acta Materialia, 2004Co-Authors: Jiři Man, Karel Obrtlik, Martin Petrenec, J PolakAbstract:Atomic force Microscopy and high resolution scanning electron Microscopy were applied to the study of Surface relief evolution at emerging persistent slip bands (PSBs) in individual grains of ferritic X10CrAl24 stainless steel cycled with constant plastic strain amplitude. Only the combination of both methods can reveal the true shape and fine details of extrusions and intrusions. Quantitative data on the changes of the Surface topography of persistent slip markings and on the kinetics of extrusion growth during the fatigue life were obtained. Transmission electron Microscopy of Surface foils revealed PSBs with the typical, well-known ladder structure. Experimental data on cyclic slip localization in PSBs are compared with those in fcc metals and discussed in terms of vacancy models of Surface relief evolution and fatigue crack initiation.
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atomic force Microscopy of Surface relief in individual grains of fatigued 316l austenitic stainless steel
Acta Materialia, 2002Co-Authors: Jiři Man, Karel Obrtlik, C Blochwitz, J PolakAbstract:Abstract Surface relief adjacent to the persistent slip bands (PSBs) in polycrystalline 316L stainless steel cycled with constant plastic strain amplitude up to 60% of fatigue life was studied using atomic force Microscopy with respect to the crystallographic orientation (determined by electron backscattering diffraction—EBSD) and the size of individual grains. Surface relief is formed mostly by ribbon-like extrusions whose height in a grain was found to be proportional to the thickness of the corresponding PSB. The extrusions grow predominantly in the direction of the active Burgers vector. The height of an extrusion in the direction of the active Burgers vector is proportional to the grain size. No systematic dependence of the extrusion height in the active slip direction on the grain orientation was observed. The experimental results are discussed in terms of the recent vacancy models of Surface relief evolution.
Jiři Man - One of the best experts on this subject based on the ideXlab platform.
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afm and tem study of cyclic slip localization in fatigued ferritic x10cral24 stainless steel
Acta Materialia, 2004Co-Authors: Jiři Man, Karel Obrtlik, Martin Petrenec, J PolakAbstract:Atomic force Microscopy and high resolution scanning electron Microscopy were applied to the study of Surface relief evolution at emerging persistent slip bands (PSBs) in individual grains of ferritic X10CrAl24 stainless steel cycled with constant plastic strain amplitude. Only the combination of both methods can reveal the true shape and fine details of extrusions and intrusions. Quantitative data on the changes of the Surface topography of persistent slip markings and on the kinetics of extrusion growth during the fatigue life were obtained. Transmission electron Microscopy of Surface foils revealed PSBs with the typical, well-known ladder structure. Experimental data on cyclic slip localization in PSBs are compared with those in fcc metals and discussed in terms of vacancy models of Surface relief evolution and fatigue crack initiation.
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atomic force Microscopy of Surface relief in individual grains of fatigued 316l austenitic stainless steel
Acta Materialia, 2002Co-Authors: Jiři Man, Karel Obrtlik, C Blochwitz, J PolakAbstract:Abstract Surface relief adjacent to the persistent slip bands (PSBs) in polycrystalline 316L stainless steel cycled with constant plastic strain amplitude up to 60% of fatigue life was studied using atomic force Microscopy with respect to the crystallographic orientation (determined by electron backscattering diffraction—EBSD) and the size of individual grains. Surface relief is formed mostly by ribbon-like extrusions whose height in a grain was found to be proportional to the thickness of the corresponding PSB. The extrusions grow predominantly in the direction of the active Burgers vector. The height of an extrusion in the direction of the active Burgers vector is proportional to the grain size. No systematic dependence of the extrusion height in the active slip direction on the grain orientation was observed. The experimental results are discussed in terms of the recent vacancy models of Surface relief evolution.
Hrvoje Petek - One of the best experts on this subject based on the ideXlab platform.
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femtosecond Microscopy of Surface plasmon polariton wave packet evolution at the silver vacuum interface
Nano Letters, 2007Co-Authors: Atsushi Kubo, Niko Pontius, Hrvoje PetekAbstract:A movie of the dispersive and dissipative propagation of Surface plasmon polariton (SPP) wave packets at a silver/vacuum interface is recorded by the interferometric time-resolved photoemission electron Microscopy with 60 nm spatial resolution and 330 as frame interval. The evolution of SPP wave packets is imaged through a two-path interference created by a pair of 10 fs phase correlated pump−probe light pulses at 400 nm. The wave packet evolution is simulated using the complex dielectric function of silver.
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Ultrafast Microscopy of Surface plasmon dynamics
2006 Conference on Lasers and Electro-Optics and 2006 Quantum Electronics and Laser Science Conference, 2006Co-Authors: Hrvoje PetekAbstract:Localized and propagating Surface plasmon dynamics in Ag films are imaged by time-resolved photoemission electron Microscopy with
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Femtosecond Microscopy of Surface Plasmon Propagation in a Silver Film
15th International Conference on Ultrafast Phenomena, 2006Co-Authors: Atsushi Kubo, Niko Pontius, Hrvoje PetekAbstract:Propagation of Surface plasmon polariton (SPP) in a silver film launched by 10-fs, 400-nm pulsed light is imaged at 0.33-fs delay/frame rate. The dynamics of SPP are simulated based on SPP complex wave vector.
Karel Obrtlik - One of the best experts on this subject based on the ideXlab platform.
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afm and tem study of cyclic slip localization in fatigued ferritic x10cral24 stainless steel
Acta Materialia, 2004Co-Authors: Jiři Man, Karel Obrtlik, Martin Petrenec, J PolakAbstract:Atomic force Microscopy and high resolution scanning electron Microscopy were applied to the study of Surface relief evolution at emerging persistent slip bands (PSBs) in individual grains of ferritic X10CrAl24 stainless steel cycled with constant plastic strain amplitude. Only the combination of both methods can reveal the true shape and fine details of extrusions and intrusions. Quantitative data on the changes of the Surface topography of persistent slip markings and on the kinetics of extrusion growth during the fatigue life were obtained. Transmission electron Microscopy of Surface foils revealed PSBs with the typical, well-known ladder structure. Experimental data on cyclic slip localization in PSBs are compared with those in fcc metals and discussed in terms of vacancy models of Surface relief evolution and fatigue crack initiation.
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atomic force Microscopy of Surface relief in individual grains of fatigued 316l austenitic stainless steel
Acta Materialia, 2002Co-Authors: Jiři Man, Karel Obrtlik, C Blochwitz, J PolakAbstract:Abstract Surface relief adjacent to the persistent slip bands (PSBs) in polycrystalline 316L stainless steel cycled with constant plastic strain amplitude up to 60% of fatigue life was studied using atomic force Microscopy with respect to the crystallographic orientation (determined by electron backscattering diffraction—EBSD) and the size of individual grains. Surface relief is formed mostly by ribbon-like extrusions whose height in a grain was found to be proportional to the thickness of the corresponding PSB. The extrusions grow predominantly in the direction of the active Burgers vector. The height of an extrusion in the direction of the active Burgers vector is proportional to the grain size. No systematic dependence of the extrusion height in the active slip direction on the grain orientation was observed. The experimental results are discussed in terms of the recent vacancy models of Surface relief evolution.
Alain Dereux - One of the best experts on this subject based on the ideXlab platform.
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Leakage radiation Microscopy of Surface plasmon coupled emission: investigation of gain-assisted propagation in an integrated plasmonic waveguide
Journal of Microscopy, 2010Co-Authors: Jonathan Grandidier, Gérard Colas Des Francs, Sebastien Massenot, Alexandre Bouhelier, Laurent Markey, Jean Claude Weeber, Alain DereuxAbstract:Using a single-mode dielectric-loaded Surface plasmon polariton waveguide doped with quantum dots, we were able to slightly increase the propagation length of the mode by stimulated emission of plasmon. We analyse the amplification phenomenon in the visible range by combining leakage radiation Microscopy and Surface plasmon coupled emission techniques.