کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7971665 1514611 2018 27 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Clustering behavior during natural aging and artificial aging in Al-Mg-Si alloys with different Ag and Cu addition
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد دانش مواد (عمومی)
پیش نمایش صفحه اول مقاله
Clustering behavior during natural aging and artificial aging in Al-Mg-Si alloys with different Ag and Cu addition
چکیده انگلیسی
The effect of Ag and Cu addition on clustering behavior of Al-Mg-Si alloys during natural aging (NA) and artificial aging (AA) was investigated by hardness measurement, tensile test and atom probe tomography analysis. The results show that both Ag and Cu atoms could enter clusters and GP-zones, change the Mg/Si ratio and increase their volume fractions. Compared with the A1 base alloy, the clusters in the Ag/Cu-added alloys more easily transform to β″ phases for size and compositional similarity, and the strengthening ability of these particles is enhanced by the increased volume fraction and shear modulus. In NA condition, Cu is greater in improving the volume fraction of clusters than Ag and thus produces higher T4 temper hardness. In AA condition, in contrary, Ag is more effective in facilitating the formation and growth of particles than Cu due to the stronger Ag-Mg interaction and the high diffusivity of Ag atoms in Al matrix, leading to highest hardening response. Compared to the Cu-added alloy, the Ag-added alloy shows higher precipitation kinetics during AA treatment and maintains a lower T4 temper hardness.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Science and Engineering: A - Volume 732, 8 August 2018, Pages 273-283
نویسندگان
, , , , ,