کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1447915 988659 2009 12 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
The origin of non-uniform microstructure and its effects on the mechanical properties of a friction stir processed Al–Mg alloy
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
The origin of non-uniform microstructure and its effects on the mechanical properties of a friction stir processed Al–Mg alloy
چکیده انگلیسی

The microstructure of the stirred zone (SZ) resulting from friction stir processing or welding (FSP/FSW) has usually been assumed to be uniform when discussing the mechanical properties. However, numerous works have indicated that the fine-grained microstructures in the SZ were non-uniform, with precipitate, texture and grain size gradients caused by the severe plastic deformation and heat distribution. In this work commercial aluminum alloy 5083-H112 was subjected to FSP and fine-grained microstructures with an average grain sizes of 2.7–13.4 μm were obtained by controlling the FSP conditions. The stress–strain curves exhibited stepped yield point elongation, which was suggested to be associated with these characteristic non-uniform microstructures. Tensile tests indicated that the Hall–Petch relationship held in this FSP alloy when taking account of the average grain size. Toughness analysis indicated that the optimum toughness was anticipated to be obtained around a grain size of ∼1 μm for this FSP alloy.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Acta Materialia - Volume 57, Issue 19, November 2009, Pages 5718–5729
نویسندگان
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