کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7969016 1514344 2018 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
On visualizing material flow and precipitate evolution during probeless friction stir spot welding of an Al-Li alloy
ترجمه فارسی عنوان
در تجسم جریان مواد و تکامل رسوب در هنگام اصطکاک نامطلوب آسیاب نقطه جوش یک آلیاژ آل لی
کلمات کلیدی
جوشکاری نقطه جوش اصطکاکی، آلیاژ آل لی، رسوب، تجسم جریان مواد،
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد دانش مواد (عمومی)
چکیده انگلیسی
The precipitate evolution and material flow visualization during probeless friction stir spot welding (P-FSSW) of an Al-Li alloy has been investigated experimentally and numerically in this work. Due to severe heat input during welding, the main strengthening phases of T1 fully dissolved in the stir zone followed by the re-precipitation of GP zone and δ′ phases, assisted with the refinement of the intermetallic particles and grains. The history of material flow was three-dimensionally visualized with a tracer, studied with X-ray tomography. The experiments and the simulation results provided a consistent interpretation of a circumferential material flow which moved inwards radially near the top surface. Upward flow in the bottom sheet improved with dwell time, causing the interface to bend. Local abrasion between the two sheets due to flow difference led to the disruption of oxide layer, and formed a connection at the interface.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Characterization - Volume 144, October 2018, Pages 336-344
نویسندگان
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