Ahmed Hatem Omar Abdelaziz Elkhoribi <br/><br/>
Effect of pouring temperature and ultrasonic treatment on the grain size and morphology of Al-4.5% Mg and Al-7% Si Cast Alloys /  
 Al-7% Si , Al-4.5% Mg تأثير درجة حرارة الصب والمعالجة فوق الصوتية على حجم وشكل الحبيبات في سبيكتي صب الألومنيوم 
Ahmed Hatem Omar Abdelaziz Elkhoribi ; Supervised Waleed Khalifa , Shimaa Elhadad 
 - Cairo :   Ahmed Hatem Omar Abdelaziz Elkhoribi ,   2014 
 - 69 P. :   charts , facsimiles ;   30cm 
<br/><br/>Thesis (M.Sc.) - Cairo University - Faculty of Engineering - Department of Metallurgical Engineering 
<br/><br/> Grain refinement has many beneficial effects on Al-cast alloys, such as increasing fluidity, reducing hot cracking, reducing micro porosity, improving yield strength, and improving fracture toughness. This work was carried out to investigate the effect of pouring temperature on the grain size and morphology of Al-4.5% Mg (JIS-AC7A) and Al-7% Si (JIS-AC4C) cast alloys. In addition, the effect of ultrasonic treatment (UST) was also investigated on the same alloys 
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<br/><br/><label>Subjects--Index Terms: </label>Al-cast alloys Pouring Temperature   Ultrasonic Treatment