Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 5 of 5 for “"Peierls Stress"”.
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Visualization and simulation of defect structures in the B2 phase of NiAl
… cores react to nearby point defects and applied stress. Such images may be viewed as a series of images forming an animation such that a simulated quantity, such as applied stress, is cast into time. Three movies were made doing this. Invariant fields are seen to expand and/or contract before and …
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Thermo-mechanical behavior of silicon at nanoscale — an in situ investigation
… strength of silicon samples incorporated with stress gradient and material characteristic of silicon due to strong covalent bond. For theoretical study of the size dependent yield behavior, we have employed an isotropic elastic continuum based model. The model shows that stress concentration …
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Dislocation slip and twinning stress in shape memory alloys- theory and experiments
… shape memory performance. Precisely determining Peierls stress in dislocation slip and critical twin nucleation stress in twinning is essential to facilitate the design of new transforming alloys. This thesis presents an advanced energetic approach to investigate the attributes of phase …
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Plastic Deformation in Complex Crystal Structures
… that a general method for tailoring the flow stress of a material might be found. Present ductile-brittle criteria are based on simple ratios of polycrystalline elastic constants and are too limited to accurately capture flow behaviour. There are complex materials which, despite such criteria …
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Thermal Stability, Microstructures and Mechanical Properties of Nanostructured/Ultrafine Structured Cu-5vol.%Al₂O₃ Nanocomposites Fabricated by High Energy Mechanical Milling and Powder Compact Extrusion
… can be predicted appropriately by the sum of Peierls stress, grain boundary strengthening, nanoparticle strengthening and strain hardening. The effect of annealing on an ultrafine structured Cu-5vol.%Al₂O₃ nanocomposite sample made by powder compact extrusion at 900°C was investigated by …