کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1579547 1514829 2010 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Enhanced fatigue crack propagation resistance of an Al–Cu–Mg alloy by artificial aging under influence of electrical field
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد دانش مواد (عمومی)
پیش نمایش صفحه اول مقاله
Enhanced fatigue crack propagation resistance of an Al–Cu–Mg alloy by artificial aging under influence of electrical field
چکیده انگلیسی

The combining effect of artificial age plus electric field (16 kV/cm) at 190 °C on microstructure and fatigue crack propagation (FCP) resistance of an Al–Cu–Mg alloy was investigated by transmission electron microscope (TEM), scanning electron microscope (SEM), energy dispersive X-ray spectroscopy (EDS) and fatigue testing. The results showed that, during aging process with electric field grain boundaries became coarse with S′ phase precipitates, and the precipitates were much finer and dispersed more uniform in matrix. As a result, tensile properties of aged samples did not change significantly. FCP resistance of samples with electric field on was higher due to higher barriers for dislocation movement, caused by more dispersed precipitates of S′ phase. A vacancy-atom diffusion model was introduced to explain microstructure evolution during electric field aging process.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Science and Engineering: A - Volume 527, Issues 16–17, 25 June 2010, Pages 4070–4075
نویسندگان
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