کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1635848 1516946 2016 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Low frequency damping behavior associated with sintering process in Al powder compact
ترجمه فارسی عنوان
رفتار ماندگاری با فرکانس پایین همراه با فرایند پخت و پز در پودر آلومینیومی
کلمات کلیدی
آل پودر جمع و جور، اصطکاک داخلی، پختن مرز دانه
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد فلزات و آلیاژها
چکیده انگلیسی

The internal friction behavior of Al green power compact duxing the sintering process was studied as a function of temperature. The internal friction measurements were performed from room temperature to 600 °C. Two typical internal friction peaks were detected corresponding to heating and cooling processes, respectively. The heating peak corresponds to a recrystallization process of deformed Al particles, which is influenced by many extrinsic parameters, such as measuring frequency, strain amplitude, heating rate, power particle size and compacting pressure. However, the intrinsic nature of the peak is originated from the micro-sliding of the weak-bonding interfaces between Al particles and increased dislocation density induced in compressing. The cooling peak with the activation energy of (1.64±0.06) eV is associated with the grain boundary relaxation, which can be interpreted as the viscous sliding of grain boundaries. The similar phenomena are also found in the Mg green powder compact.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Transactions of Nonferrous Metals Society of China - Volume 26, Issue 4, April 2016, Pages 1176–1182
نویسندگان
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