Abstract:
One of the major challenges of rheology is to formulate laws that are relevant to the time scales of nature that are inaccessible in the laboratory. We are convinced that this requires a rigorous control of the deformation mechanisms at work. Transmission electron microscopy is traditionally the tool of choice for characterizing deformation mechanisms at the microscopic scale. Today, this tool is no longer solely dedicated to characterization, but is being transformed into a deformation machine. The insertion of MEMS in the electron microscope allows to isolate, activate and characterize in situ elementary deformation mechanisms. In this talk, Patrick Cordier presents the results of a few ongoing studies that highlight original grain boundary sliding mechanisms involving solid-state amorphisation.
Patrick Cordier studies plastic deformation under extreme pressure-temperature conditions at Unité Matériaux et Transformations, Université of Lille. His talk is hosted by Zack Geballe.
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