The fine-scale precipitates, that occurs during aging, the supersaturated AI-1.0 at.% Mg-x at.% Si (x = 0.6, 1.0 and 1.6) alloys have been investigated by differential scanning calorimetry (DSC), scanning electron microscopy (SEM) and X-ray diffraction (XRD) techniques. The strength of the alloys increases as a high density of very fine W' coherent and 13' semicoherent precipitates nucleate. The precipitates compositions have been determined by analyzing the X-ray diffraction (XRD) charts, by using Scherrer equation. The obtained results showed that the 13" and 13' precipitates size lies in the nanometer range (from ~5 nm to ~32 nm). In addition, increasing Si concentration has exhibited an increase in the density of the precipitates, which fortifies the physical properties.
ملخص البحث
قسم البحث
مجلة البحث
Alloys and Compounds
المشارك في البحث
تصنيف البحث
1
عدد البحث
Vol. 477
سنة البحث
2009
صفحات البحث
pp. 295-300