کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5435889 1509541 2017 11 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Individual effect of recrystallisation nucleation sites on texture weakening in a magnesium alloy: Part 1- double twins
ترجمه فارسی عنوان
اثر فردی از محل های هسته ی بازسازی شده بر تسریع بافت در یک آلیاژ منیزیم: قسمت 1 - دوقلوهای دوقلو
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
چکیده انگلیسی

Recrystallised grain nucleation, grain growth and corresponding texture evolution in a cold-rolled rare earth containing WE43 Mg alloy during annealing at 490 °C was fully tracked using a quasi-in-situ electron backscatter diffraction method. The results show nucleation sites, such as double twins, can weaken the deformed texture and for the first time provide direct evidence that recrystallised grains originating from double twins can form the rare earth texture during annealing. Precipitation and recrystallisation occurred concurrently during most of the annealing period, with precipitates forming preferentially along prior grain and twin boundaries. These precipitates effectively retard the recrystallisation due to particle pinning leading to an excessively long time for the completion of recrystallisation. A large portion of recrystallised grains were observed to have 〈0001〉 poles tilted 20-45° away from the normal direction. The RE texture emerges during the nucleation of recrystallised grains and is maintained during subsequent uniform grain growth, which results in a stable RE texture being developed as recrystallisation progresses. The uniform grain growth could be attributed to solute drag suppressing the grain boundary mobility of those grains that had recrystallised with a basal texture and precipitate pinning restricting potential orientated grain growth.

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ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Acta Materialia - Volume 135, 15 August 2017, Pages 14-24
نویسندگان
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