Investigation Of Deformation Mechanisms In Nanocrystalline Metals And Alloys By In Situ Synchrotron X Ray Diffraction
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| Author | : Jochen Andreas Lohmiller |
| Publisher | : KIT Scientific Publishing |
| Total Pages | : 250 |
| Release | : 2014-05-22 |
| Genre | : Technology & Engineering |
| ISBN | : 3866449623 |
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.
| Author | : Katherine Marshall |
| Publisher | : Routledge |
| Total Pages | : 0 |
| Release | : 2008-01-31 |
| Genre | : Political Science |
| ISBN | : 9781000031997 |
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
| Author | : Mishra, Nilesha |
| Publisher | : KIT Scientific Publishing |
| Total Pages | : 156 |
| Release | : 2019-02-15 |
| Genre | : Capacitors |
| ISBN | : 3731508532 |
Ink-jet printed devices on the flexible substrate are inexpensive and large area compatible as compared to rigid substrates. However, during fabrication and service they are subjected to complex strains, resulting in crack formation or delamination within the layers, affecting the device performance. Therefore, it is necessary to understand their failure mechanisms by correlating their electrical or structural properties with applied strain, supported by detailed microstructural investigations.
| Author | : Syha, Melanie |
| Publisher | : KIT Scientific Publishing |
| Total Pages | : 178 |
| Release | : 2014-09-25 |
| Genre | : Science |
| ISBN | : 3731502429 |
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 .
| Author | : Kumar, Amritesh |
| Publisher | : KIT Scientific Publishing |
| Total Pages | : 160 |
| Release | : 2017-11-06 |
| Genre | : |
| ISBN | : 3731506947 |
| Author | : Straub, Thomas |
| Publisher | : KIT Scientific Publishing |
| Total Pages | : 234 |
| Release | : 2016 |
| Genre | : Technology (General) |
| ISBN | : 3731504715 |
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.
| Author | : Röhe, Maximilian |
| Publisher | : KIT Scientific Publishing |
| Total Pages | : 178 |
| Release | : 2024-01-09 |
| Genre | : |
| ISBN | : 3731512343 |
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.
| Author | : Feuchter, Manuel Klaus Ludwig |
| Publisher | : KIT Scientific Publishing |
| Total Pages | : 258 |
| Release | : 2014-10-01 |
| Genre | : Technology & Engineering |
| ISBN | : 3731502615 |
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.
| Author | : Christian Mennerich |
| Publisher | : KIT Scientific Publishing |
| Total Pages | : 284 |
| Release | : 2014-05-13 |
| Genre | : Science |
| ISBN | : 3731500094 |
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.
| Author | : Cihan, Ebru |
| Publisher | : KIT Scientific Publishing |
| Total Pages | : 194 |
| Release | : 2020-10-21 |
| Genre | : Technology & Engineering |
| ISBN | : 3731509997 |
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.
