کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
10620437 988631 2012 12 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
In situ evaluation of dynamic precipitation during plastic straining of an Al-Zn-Mg-Cu alloy
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
In situ evaluation of dynamic precipitation during plastic straining of an Al-Zn-Mg-Cu alloy
چکیده انگلیسی
The coupling between precipitation and plasticity has been systematically investigated in an Al-Zn-Mg-Cu alloy using in situ small-angle X-ray scattering measurements during thermomechanical tests. Material pre-aged to two different initial precipitate conditions has been examined. Each pre-aged condition has been strained at 160 °C and we show that the plasticity induces an accelerated coarsening kinetics, which we characterize in terms of the evolution of the precipitate size. This acceleration is correlated with the degree of plastic strain, but does not depend markedly on strain rate. The experimental data strongly suggests that the accelerated kinetics is mainly linked with the accumulation of a supersaturation of vacancies during plastic flow that increases the effective diffusion constant.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Acta Materialia - Volume 60, Issue 5, March 2012, Pages 1905-1916
نویسندگان
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