کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1579794 1514836 2009 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Study of the early stages of clustering in Al–Mg–Si alloys using the electrical resistivity measurements
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد دانش مواد (عمومی)
پیش نمایش صفحه اول مقاله
Study of the early stages of clustering in Al–Mg–Si alloys using the electrical resistivity measurements
چکیده انگلیسی

The natural ageing of Al–0.5%Mg–1%Si alloy at low temperatures, namely, −20, 0, RT and 50 °C, is investigated through the use of the electrical resistivity measurements and positron annihilation spectroscopy. It was found that over extended periods of time, the resistivity increases linearly with the logarithm of time. More importantly, three clear stages of clustering were observed during natural ageing. The possible origin of these three distinct stages was briefly discussed. As well, the activation energy of clustering during the second stage was calculated using the cross-cut technique. The measured value was relatively close to the migration energies of vacancies and solute atoms (Mg/Si) which suggested an important role of them in the clustering process. Finally it was found that the solution treatment temperature does not have a significant effect on the mechanism of clustering.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Science and Engineering: A - Volume 525, Issues 1–2, 15 November 2009, Pages 186–191
نویسندگان
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