Global ETD Search
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Showing 1 to 4 of 4 for “"Dislocation avalanches"”.
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On the observations of autowaves and avalanches in an aluminum magnesium alloy
… plastic behavior which is attributed to dislocation avalanches. The strain magnitudes for these autowaves and dislocation avalanches are much lower than would be observed for a plastic burst developed from the Portevin-Le Chatelier effect. Fourier analysis on the global load signal …
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Scaling and Pattern Formation in Condensed Matter Systems
… of the model by applying a shearing force. Dislocation avalanches, which resembling the scaling behavior in driven ferromagnetic, are observed. Critical exponents are extracted from power laws extending over 5 decades. I extend the PFC model to accommodate actual atomic configurations and …
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Non-universal behavior of intermittent flow in microplasticity
… assumed that any fluctuations in the underlying dislocation motion were essentially Gaussian and could therefore be accurately represented by large-scale averages in a homogenous continuum. However, more modern experiments have shown that plasticity of metals demonstrates stochastically …
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Structural Evolution in the Dynamic Plasticity of FCC Metals
… contribution. Chapter 2 outlines the basics of dislocation plasticity, based on the seminal works of Taylor and Orowan. It then progresses on to discuss recent experimental and theoretical work on the understanding of slip as avalanche behaviour. Chapter 3 summarises traditional modelling …