Research Interests:
Research Interests:
Research Interests:
Research Interests:
Research Interests:
Research Interests: Engineering, Materials Science, Microstructure, Electron Backscatter Diffraction (EBSD), Materials, and 13 moreStrain Rate, Band Structure, Properties, Copper, Dislocations, CHEMICAL SCIENCES, Grain Boundary, Microstructures, Cell Wall, Deformation Mechanism, Strain Hardening, Tensile Properties, and Strain rate sensitivity
Analytical models for the stress response during twinning have been developed for other systems and these have emphasized twin initiation [1], the phenomenology of the stress response [2] and the influence of twin boundaries on slip [3].... more
Analytical models for the stress response during twinning have been developed for other systems and these have emphasized twin initiation [1], the phenomenology of the stress response [2] and the influence of twin boundaries on slip [3]. For View the MathML source twinning in ...
Research Interests:
Research Interests:
Research Interests: Materials Engineering, Mechanical Engineering, Microstructure, Evolution, Transmission Electron Microscopy, and 21 moreSpinning, Processing, Severe Plastic Deformation, Low Energy Buildngs, Channel, Dislocations, Free, Grain size, Texture, Finite element simulation, Forming, Grain Boundary, Extrusion, Microstructures, Route, Plastic deformation, Materials Processing, DIE, Aluminium Alloy, Angle, and Grain Refinement
Research Interests:
Research Interests:
The work hardening rate, strain rate sensitivity and the apparent activation volume of copper processed by equal channel angular extrusion (ECAE) for 1–16 passes are investigated. Constant strain rate and strain rate jump tests performed... more
The work hardening rate, strain rate sensitivity and the apparent activation volume of copper processed by equal channel angular extrusion (ECAE) for 1–16 passes are investigated. Constant strain rate and strain rate jump tests performed in compression up to 30% of ...
Research Interests:
... 2. The maximum extrusion ratio predicted using FE analysis dropped from 90 to 40 when the extrusion ram speed was raised from 5 to 50 mm/s. ... [4] BM Closset, JF Perey, C. Bonjour, PA Moos, Microstructure and properties of wrought... more
... 2. The maximum extrusion ratio predicted using FE analysis dropped from 90 to 40 when the extrusion ram speed was raised from 5 to 50 mm/s. ... [4] BM Closset, JF Perey, C. Bonjour, PA Moos, Microstructure and properties of wrought magnesium alloys, in: BL Mordike, KU ...
Research Interests:
Research Interests: Materials Engineering, Mechanical Engineering, Materials Science, Microstructure, Transmission Electron Microscopy, and 16 moreFinite Element, Quantitative analysis, Spinning, Processing, Severe Plastic Deformation, Channel, Free, Texture, Forming, Extrusion, Microstructures, Route, Plastic deformation, Quantitative Analysis, Grain Refinement, and SLIP
The strain rate sensitivity m and the apparent activation volume Vap of equal channel angular extruded Cu up to 12 passes was measured by strain rate cycling tests in compression. With increasing number of passes of ECAE an increase in m... more
The strain rate sensitivity m and the apparent activation volume Vap of equal channel angular extruded Cu up to 12 passes was measured by strain rate cycling tests in compression. With increasing number of passes of ECAE an increase in m and a ...
Research Interests:
Research Interests:
Research Interests:
Research Interests: Materials Engineering, Mechanical Engineering, Materials Science, Microstructure, Monte Carlo Simulation, and 12 moreKinetics, Modeling, Cellular Automata, Phase Transitions, Simulation, Nucleation, Real Time, Recrystallization, Mathematical Model, Microstructures, Three Dimensional, and Cellular automaton
Gradient plasticity modelling combining a micro-structure-related constitutive description of the local material behaviour with a particular gradient plasticity frame is presented. The constitutive formulation is based on a phase mixture... more
Gradient plasticity modelling combining a micro-structure-related constitutive description of the local material behaviour with a particular gradient plasticity frame is presented. The constitutive formulation is based on a phase mixture model in which the dislocation cell walls and the cell interiors are considered as separate ‘phases’, the respective dislocation densities entering as internal variables. Two distinct physical mechanisms, which give rise to gradient plasticity, are considered. The first one is associated with the occurrence of geometrically necessary dislocations leading to first-order strain gradients; the second one is associated with the reaction stresses due to plastic strain incompatibilities between neighbouring grains, which lead to second-order strain gradients. These two separate variants of gradient plasticity were applied to the case of high-pressure torsion: a process known to result in a fairly uniform, ultrafine grained structure of metals. It is shown that the two complementary variants of gradient plasticity can both account for the experimental results, thus resolving a controversial issue of the occurrence of a uniform micro-structure as a result of an inherently non-uniform process.
Research Interests:
... a, Max Planck Institute for Iron Research, Max-Planck-Str. 1, D-40237 Düsseldorf, Germany. ... 27 de Febrero 210 Bis, 2000 Rosario, Argentina. e, Institute of Materials Research, GKSS-Research Centre, Max-Planckstr., Geb. 3, D-21502... more
... a, Max Planck Institute for Iron Research, Max-Planck-Str. 1, D-40237 Düsseldorf, Germany. ... 27 de Febrero 210 Bis, 2000 Rosario, Argentina. e, Institute of Materials Research, GKSS-Research Centre, Max-Planckstr., Geb. 3, D-21502 Geesthacht, Germany. ...