54th IROAST Seminar-Recent developments in the study of grain/twin boundary mediated plasticity-held on February 28 (Thu), 2019

Feb 28, 2019


The results of experiments on bicrystals with various grain boundaries moving under mechanical stress will be reviewed. The boundary migration – shear coupling will be discussed. The extended geometric model of boundary migration - shear coupling for evaluating the coupling factor, i.e. the amount of produced shear, for twin and grain boundaries in various crystal structures will be presented. It will be shown that the coupling factors calculated according to the proposed general formula are in excellent agreement with respective experimental and simulation data known from literature. Also, the results of experiments with specifically oriented magnesium single crystals deformed at ambient and elevated temperatures in channel-die plane strain compression will be reported. The formation of anomalous{10-12} extension twins, which had negative Schmid factors and produced a strain opposite to the imposed deformation will beanalyzed considering the operating deformation mechanisms and heterogeneities with respect to lattice rotation.

Professor Sadahiro Tsurekawa,
FAST, Kumamoto University
Professor Dmitori Molodov,
Institute of Physical Metallurgy and Metal Physics,
RWTH Aachen University, Germany/
IROAST Visiting Professor



54th IROAST Seminar

Feb 28, 2019




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