کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1445668 1509603 2014 11 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Differences in deformation behavior of bicrystalline Cu micropillars containing a twin boundary or a large-angle grain boundary
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
Differences in deformation behavior of bicrystalline Cu micropillars containing a twin boundary or a large-angle grain boundary
چکیده انگلیسی

Micrometer-sized compression pillars containing a grain boundary are investigated to better understand under which conditions grain boundaries have a strengthening effect. The compression experiments were performed on focused ion beam fabricated micrometer-sized bicrystalline Cu pillars including either a large-angle grain boundary (LAGB) or a coherent twin boundary (CTB) parallel to the compression axis and additionally on single-crystalline reference samples. Pillars containing a LAGB show increased strength, stronger hardening and smaller load drops compared to single crystals and exhibit a bent boundary and pillar shape. Samples with a CTB show no major difference in stress–strain data compared to the corresponding single-crystalline samples. This is due to the special orientation and symmetry of the twin boundary and is reflected in a characteristic pillar shape after deformation. The experimental findings can be related to the dislocation–boundary interactions at the different grain boundaries and are compared with three-dimensional discrete dislocation dynamics simulations.

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ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Acta Materialia - Volume 73, July 2014, Pages 240–250
نویسندگان
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