Download or read book Experimental Investigations of Deformation Pathways in Nanowires written by Andreas Sedlmayr and published by . This book was released on 2012 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Experimental Investigations of Deformation Pathways in Nanowires written by Andreas Sedlmayr and published by KIT Scientific Publishing. This book was released on 2014-07-30 with total page 222 pages. Available in PDF, EPUB and Kindle. Book excerpt: This work deals with the experimental investigation of the mechanical properties of nanowires. Experiments are conducted in a dedicated system inside the electron microscope. The mechanical response of various material systems is probed, the underlying deformation mechanisms are elucidated and subsequently put into context with mechanical size effects.
Download or read book Experimental Investigation of Crack Initiation in Face Centered Cubic Materials in the High and Very High Cycle Fatigue Regime written by Straub, Thomas and published by KIT Scientific Publishing. This book was released on 2016 with total page 234 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Download or read book Micromechanical study on the deformation behaviour of directionally solidified NiAl Cr eutectic composites written by Kumar, Amritesh and published by KIT Scientific Publishing. This book was released on 2017-11-06 with total page 160 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Investigation of Deformation Mechanisms in Nanocrystalline Metals and Alloys by in Situ Synchrotron X ray Diffraction written by Jochen Andreas Lohmiller and published by KIT Scientific Publishing. This book was released on 2014-05-22 with total page 250 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Download or read book Modelling the Plastic Deformation of Iron written by Zhiming Chen and published by KIT Scientific Publishing. This book was released on 2014-07-31 with total page 174 pages. Available in PDF, EPUB and Kindle. Book excerpt: The 1/2111 screw dislocations in bcc iron are studied by atomistic simulations. An analytical yield criterion captures correctly the non-Schmid plastic behavior. A model Peierls potential develops a link between the atomistic modeling at 0 K and the thermally activated dislocation motion. All predicted features agree well with experimental observations. This work establishes a consistent bottom-up model that provides an insight into the microscopic origins of the plastic behavior of bcc iron.
Download or read book Microstructural Stability of Nanostructured Fcc Metals During Cyclic Deformation and Fatigue written by Matthias Friedrich Funk and published by KIT Scientific Publishing. This book was released on 2014-05-22 with total page 218 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nanostructured metals with maximal grain or twin sizes of less than 100 nm have advanced properties like increased strength.As beneficial as these microstructures can be for the strength of materials, they are not infinitely stable. During mechanical loading these metals tend to coarsen and lose their beneficial structure. Besides electron microscopic analysis of fatigued samples, in situ cycling tests were conducted in order to observe structural degradation during mechanical loading.
Download or read book Deformation and Fracture Properties of the Soft Magnetic Composite Somaloy 700 3P on Different Length Scales written by Schwark, Tabea Gisela and published by KIT Scientific Publishing. This book was released on 2018-07-09 with total page 178 pages. Available in PDF, EPUB and Kindle. Book excerpt: Soft Magnetic Composites (SMCs) typically consist of large iron particles coated with a fairly thin inorganic layer. The combination of soft particles with a brittle layer causes, however, a rather poor mechanical behaviour of the SMCs. The particle boundaries of the specific SMC Somaloy 700 3P can be classified into four different types according to the complexity of their layers. Tests on both micro- and macroscale showed that the particle-boundary interface is critical in terms of failure.
Download or read book Microstructure evolution in strontium titanate Investigated by means of grain growth simulations and x ray diffraction contrast tomography experiments written by Syha, Melanie and published by KIT Scientific Publishing. This book was released on 2014-09-25 with total page 178 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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 .
Download or read book Investigations on Joule heating applications by multiphysical continuum simulations in nanoscale systems written by Feuchter, Manuel Klaus Ludwig and published by KIT Scientific Publishing. This book was released on 2014-10-01 with total page 258 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Download or read book On the Electro Chemo Mechanical Coupling in Solid State Batteries and its Impact on Morphological Interface Stability written by Ganser, Markus and published by KIT Scientific Publishing. This book was released on 2021-03-09 with total page 272 pages. Available in PDF, EPUB and Kindle. Book excerpt: Solid state batteries with a lithium metal electrode are considered the next generation of high energy battery technology. Unfortunately, lithium metal is prone to harmful protrusion or dendrite growth which causes dangerous cell failure. Within this work the problem of protrusion growth is tackled by deriving a novel electro-chemo-mechanical theory tailored for binary solid state batteries which is then used to discuss the impact of mechanics on interface stability by numerical studies.
Download or read book Characterization and Modeling of the Ratcheting Behavior of the Ferritic Martensitic Steel P91 written by Zhang, Kuo and published by KIT Scientific Publishing. This book was released on 2017-07-12 with total page 224 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this work, the ratcheting-behavior of 9%Cr-1%Mo ferritic-martensitic steel is studied with uniaxial cyclic loading. To describe the ratcheting-behavior of this steel, a visco-plastic constitutive model with consideration of cyclic softening of Reduced Activation Ferritic Martensitic steels is further modified, based on the analysis of back stress.
Download or read book The Impact of Recycling on the Fibre and the Composite Properties of Carbon Fibre Reinforced Plastics written by Hüther, Jonas Johannes and published by KIT Scientific Publishing. This book was released on 2020-06-19 with total page 360 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Phase field Modeling of Phase Changes and Mechanical Stresses in Electrode Particles of Secondary Batteries written by Zhang, Tao and published by KIT Scientific Publishing. This book was released on 2021-09-27 with total page 224 pages. Available in PDF, EPUB and Kindle. Book excerpt: Most storage materials exhibit phase changes, which cause stresses and, thus, lead to damage of the electrode particles. In this work, a phase-field model for the cathode material NaxFePO4 of Na-ion batteries is studied to understand phase changes and stress evolution. Furthermore, we study the particle size and SOC dependent miscibility gap of the nanoscale insertion materials. Finally, we introduce the nonlocal species concentration theory, and show how the nonlocality influences the results.
Download or read book Characterisation and Modelling of Continuous Discontinuous Sheet Moulding Compound Composites for Structural Applications written by Trauth, Anna and published by KIT Scientific Publishing. This book was released on 2020-12-11 with total page 468 pages. Available in PDF, EPUB and Kindle. Book excerpt: The main objective of this work is to significantly deepen the understanding of the material and the structural behaviour of continuous-discontinuous SMC composites, following a holistic approach to investigate microscopic aspects, macroscopic mechanical behaviour as well as failure evolution at the coupon, structure and component level. In addition, criteria to evaluate the effect of hybridisation are introduced and modelling approaches are presented and discussed.
Download or read book Influence of strain on the functionality of ink jet printed thin films and devices on flexible substrates written by Mishra, Nilesha and published by KIT Scientific Publishing. This book was released on 2019-02-15 with total page 158 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Dynamic Model based Analysis of Oxygen Reduction Reaction in Gas Diffusion Electrodes written by Röhe, Maximilian and published by KIT Scientific Publishing. This book was released on 2024-01-09 with total page 178 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
