|کد مقاله||کد نشریه||سال انتشار||مقاله انگلیسی||ترجمه فارسی||نسخه تمام متن|
|5435680||1398118||2018||12 صفحه PDF||ندارد||دانلود رایگان|
Synchrotron X-rays are integrated with a modified Kolsky tension bar to conduct in situ characterization of the grain refinement mechanism operating during the dynamic deformation of metals. Copper with an initial average grain size of 36Â Î¼m is refined to 6.3Â Î¼m when loaded at a constant high strain rate of 1200 sâ1. Synchrotron measurements revealed the temporal evolution of the grain refinement mechanism in terms of the initiation and rate of refinement throughout the loading test. A multiscale finite element based recrystallization model has been developed to predict the grain size evolution occurring during the dynamic deformation process. The model accurately predicts the initiation and temporal evolution of the refinement phenomenon with a predicted final average grain size of 2.4Â Î¼m.
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Journal: Acta Materialia - Volume 143, 15 January 2018, Pages 43-54