کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
829980 1470347 2013 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Early decomposition of supersaturated solid solutions of Al–Zn–Mg casting alloys
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی (عمومی)
پیش نمایش صفحه اول مقاله
Early decomposition of supersaturated solid solutions of Al–Zn–Mg casting alloys
چکیده انگلیسی


• Characteristics of GP zones formed in Al–Zn–Mg cast alloys using SAXS technique.
• GP zones formation and growth are accompanied with increase in electrical resistance.
• Direct quenching–aging process results in significant increase in electrical resistance peak.
• The electrical resistance peak of Al–Zn alloys was low compared to Mg-containing alloys.

This study aimed at investigating the structural, electrical resistivity and hardness changes of aged Al–Zn–Mg alloys. It was observed that the isothermal annealing in temperature range of 25–200 °C leads to the following precipitation sequence: Guinier–Preston zones → η′-phase → η-phase. The significant increase of electrical resistivity (ρ) of the considered alloys was associated with the stage of GP zone decomposition. The formation of the intermediate η′-phase was accompanied with a decrease of electrical resistivity and an increase of hardness. Non-continuous quenching was found to suppress the η′-phase formation; while elevated quenching rates led to the formation of uniformly distributed fine precipitates in the alloy bulk.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials & Design - Volume 50, September 2013, Pages 606–612
نویسندگان
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