Author: Jochen Andreas Lohmiller
Publisher: KIT Scientific Publishing
ISBN: 3866449623
Category : Technology & Engineering
Languages : en
Pages : 250
Book Description
In this work, different nanocrystalline metals and alloys were investigated by a synchrotron-based in situ XRD mechanical testing technique in order to investigate the dominant deformation mechanisms. All tested samples show a succession and coexistence of several mechanisms, regardless of grain size, loading condition, or sample geometry. However, the relative shares of the individual mechanisms strongly vary and depend on parameters such as grain size, sample purity, and alloy composition.
Investigation of Deformation Mechanisms in Nanocrystalline Metals and Alloys by in Situ Synchrotron X-ray Diffraction
Author: Jochen Andreas Lohmiller
Publisher: KIT Scientific Publishing
ISBN: 3866449623
Category : Technology & Engineering
Languages : en
Pages : 250
Book Description
In this work, different nanocrystalline metals and alloys were investigated by a synchrotron-based in situ XRD mechanical testing technique in order to investigate the dominant deformation mechanisms. All tested samples show a succession and coexistence of several mechanisms, regardless of grain size, loading condition, or sample geometry. However, the relative shares of the individual mechanisms strongly vary and depend on parameters such as grain size, sample purity, and alloy composition.
Publisher: KIT Scientific Publishing
ISBN: 3866449623
Category : Technology & Engineering
Languages : en
Pages : 250
Book Description
In this work, different nanocrystalline metals and alloys were investigated by a synchrotron-based in situ XRD mechanical testing technique in order to investigate the dominant deformation mechanisms. All tested samples show a succession and coexistence of several mechanisms, regardless of grain size, loading condition, or sample geometry. However, the relative shares of the individual mechanisms strongly vary and depend on parameters such as grain size, sample purity, and alloy composition.
The World Bank
Author: Katherine Marshall
Publisher: Routledge
ISBN: 9781000031997
Category : Political Science
Languages : en
Pages : 0
Book Description
The World Bank is one of the most important and least understood major international institutions. This book provides a concise, accessible and comprehensive overview of the World Bank's history, development, structure, functionality and activities. These themes are illustrated with a wide variety of case studies drawn from the Bank's int
Publisher: Routledge
ISBN: 9781000031997
Category : Political Science
Languages : en
Pages : 0
Book Description
The World Bank is one of the most important and least understood major international institutions. This book provides a concise, accessible and comprehensive overview of the World Bank's history, development, structure, functionality and activities. These themes are illustrated with a wide variety of case studies drawn from the Bank's int
Influence of strain on the functionality of ink-jet printed thin films and devices on flexible substrates
Author: Mishra, Nilesha
Publisher: KIT Scientific Publishing
ISBN: 3731508532
Category :
Languages : en
Pages : 158
Book Description
Publisher: KIT Scientific Publishing
ISBN: 3731508532
Category :
Languages : en
Pages : 158
Book Description
Microstructure evolution in strontium titanate Investigated by means of grain growth simulations and x-ray diffraction contrast tomography experiments
Author: Syha, Melanie
Publisher: KIT Scientific Publishing
ISBN: 3731502429
Category : Science
Languages : en
Pages : 178
Book Description
Understanding the physical processes during fabrication and annealing of ceramic materials is a long sought goal among material scientists. Using strontium titanate as a model system for perovskite ceramics, the present work combines advanced non-destructive 3D characterization techniques and computational modeling of microstructure evolution in order to link grain morphology, interface anisotropy and microstructure evolution to macroscopic physical properties .
Publisher: KIT Scientific Publishing
ISBN: 3731502429
Category : Science
Languages : en
Pages : 178
Book Description
Understanding the physical processes during fabrication and annealing of ceramic materials is a long sought goal among material scientists. Using strontium titanate as a model system for perovskite ceramics, the present work combines advanced non-destructive 3D characterization techniques and computational modeling of microstructure evolution in order to link grain morphology, interface anisotropy and microstructure evolution to macroscopic physical properties .
Micromechanical study on the deformation behaviour of directionally solidified NiAl-Cr eutectic composites
Author: Kumar, Amritesh
Publisher: KIT Scientific Publishing
ISBN: 3731506947
Category :
Languages : en
Pages : 160
Book Description
Publisher: KIT Scientific Publishing
ISBN: 3731506947
Category :
Languages : en
Pages : 160
Book Description
Experimental Investigation of Crack Initiation in Face-Centered Cubic Materials in the High and Very High Cycle Fatigue Regime
Author: Straub, Thomas
Publisher: KIT Scientific Publishing
ISBN: 3731504715
Category : Technology (General)
Languages : en
Pages : 234
Book Description
This book investigates the fatigue mechanisms and crack initiation of Ni, Al and Cu on a small-scale in the Very High Cycle Fatigue regime by means of innovative fatigue experimentation. A novel custom-built resonant fatigue setup showed that the sample resonant frequency changes with increasing cycle number due to fatigue damage. Mechanisms such as slip band formation have been observed. Cyclic hardening, vacancy and oxidation formation may be considered as early fatigue mechanisms.
Publisher: KIT Scientific Publishing
ISBN: 3731504715
Category : Technology (General)
Languages : en
Pages : 234
Book Description
This book investigates the fatigue mechanisms and crack initiation of Ni, Al and Cu on a small-scale in the Very High Cycle Fatigue regime by means of innovative fatigue experimentation. A novel custom-built resonant fatigue setup showed that the sample resonant frequency changes with increasing cycle number due to fatigue damage. Mechanisms such as slip band formation have been observed. Cyclic hardening, vacancy and oxidation formation may be considered as early fatigue mechanisms.
Dynamic Model-based Analysis of Oxygen Reduction Reaction in Gas Diffusion Electrodes
Author: Röhe, Maximilian
Publisher: KIT Scientific Publishing
ISBN: 3731512343
Category :
Languages : en
Pages : 178
Book Description
In this work, the first simulation model of oxygen depolarized cathodes (ODC), which are silver catalyst-based gas diffusion electrodes, is presented that considers the phase equilibrium of the gas-liquid interface and structure-related inhomogeneities in electrolyte distribution. By means of the model it has been identified that mass transport of water and ions in the liquid phase is a crucial factor for electrode performance and how it is influenced by the electrode structure.
Publisher: KIT Scientific Publishing
ISBN: 3731512343
Category :
Languages : en
Pages : 178
Book Description
In this work, the first simulation model of oxygen depolarized cathodes (ODC), which are silver catalyst-based gas diffusion electrodes, is presented that considers the phase equilibrium of the gas-liquid interface and structure-related inhomogeneities in electrolyte distribution. By means of the model it has been identified that mass transport of water and ions in the liquid phase is a crucial factor for electrode performance and how it is influenced by the electrode structure.
Investigations on Joule heating applications by multiphysical continuum simulations in nanoscale systems
Author: Feuchter, Manuel Klaus Ludwig
Publisher: KIT Scientific Publishing
ISBN: 3731502615
Category : Technology & Engineering
Languages : en
Pages : 258
Book Description
This work furthers the overall understanding of a 3w-measurement, by considering previously unexamined macroscopic influence factors within measurement by Finite Element simulations (FES). Moreover, new measuring configurations are developed to determine (an)isotropic thermal conductivities of nanoscale samples. Since no analytic solutions are available for these configurations, a new evaluation methodology is presented to determine emergent thermal conductivities by FES and Neural Networks.
Publisher: KIT Scientific Publishing
ISBN: 3731502615
Category : Technology & Engineering
Languages : en
Pages : 258
Book Description
This work furthers the overall understanding of a 3w-measurement, by considering previously unexamined macroscopic influence factors within measurement by Finite Element simulations (FES). Moreover, new measuring configurations are developed to determine (an)isotropic thermal conductivities of nanoscale samples. Since no analytic solutions are available for these configurations, a new evaluation methodology is presented to determine emergent thermal conductivities by FES and Neural Networks.
Phase-field Modeling of Multi-domain Evolution in Ferromagnetic Shape Memory Alloys and of Polycrystalline Thin Film Growth
Author: Christian Mennerich
Publisher: KIT Scientific Publishing
ISBN: 3731500094
Category : Science
Languages : en
Pages : 284
Book Description
The phase-field method is a powerful tool in computer-aided materials science as it allows for the analysis of the time-spatial evolution of microstructures on the mesoscale. A multi-phase-field model is adopted to run numerical simulations in two different areas of scientific interest: Polycrystalline thin films growth and the ferromagnetic shape memory effect. FFT-techniques, norm conservative integration and RVE-methods are necessary to make the coupled problems numerically feasible.
Publisher: KIT Scientific Publishing
ISBN: 3731500094
Category : Science
Languages : en
Pages : 284
Book Description
The phase-field method is a powerful tool in computer-aided materials science as it allows for the analysis of the time-spatial evolution of microstructures on the mesoscale. A multi-phase-field model is adopted to run numerical simulations in two different areas of scientific interest: Polycrystalline thin films growth and the ferromagnetic shape memory effect. FFT-techniques, norm conservative integration and RVE-methods are necessary to make the coupled problems numerically feasible.
Structure evolution in tribological interfaces studied by multilayer model alloys
Author: Cihan, Ebru
Publisher: KIT Scientific Publishing
ISBN: 3731509997
Category : Technology & Engineering
Languages : en
Pages : 194
Book Description
Recent studies of deformation mechanisms of metals and alloys pioneer the better investigation of the friction and wear behavior of materials with well-defined initial microstructures. Within this scope, in this work, the effect of sub-surface deformations on the resulting friction and wear behavior has been searched by means of a systematic experimental study on Au-Ni metallic multilayer model alloy system.
Publisher: KIT Scientific Publishing
ISBN: 3731509997
Category : Technology & Engineering
Languages : en
Pages : 194
Book Description
Recent studies of deformation mechanisms of metals and alloys pioneer the better investigation of the friction and wear behavior of materials with well-defined initial microstructures. Within this scope, in this work, the effect of sub-surface deformations on the resulting friction and wear behavior has been searched by means of a systematic experimental study on Au-Ni metallic multilayer model alloy system.