Weibull analysis of fluidity and hardness of ultrasonically degassed secondary Al7Si0.3Mg aluminum alloy

Abstract

I n foundry engineering, casting parameters, such as fluidity and turbulent filling directly affect the properties of the cast metals, i.e. hardness and tensile strength. Predicting these parameters can improve the entire casting process. Also, it is necessary to establish these variables in simulation techniques, and casting procedures, i.e. fluidity test and mechanical test [1]. Dong et al. [2] have investigated the effect of ultrasonic stirring on hardness and concluded that if porosities were not eliminated, the hardness values of the materials could not be increased, even if average grain diameter and eutectic silicon aspect ratio are both lowered. Moussa et al. [3] has established ascending hardness values on Mg 5 Si alloy being exposed to the ultrasonic degassing (UD) process with a 38% increase with regard to modification and refining of microstructural constituents. The variation of the mechanical properties of Al-Si alloys was investigated with solute addition and ultrasonic process. It is found that the solute addition has a great contribution to the hardness values of the alloy, and also

Effect of Ti addition holding time on casting quality and mechanical properties of A356 alloy

“…This analysis can be applied using two equations. The first equation is the Hazen method and the second is Weibull analysis [23,45,46]. These two equations were given below:…”

Influence of Al-B grain refiner on porosity formation of directionally solidified Al-Si alloys

“…It was shown that minimum porosity was obtained in Al-15Zn-2.5Mg-2.5Cu alloy when 1% AlTi 5 B 1 was used [15] . Yüksel et al [16,17] claimed that as long as the grains are smaller, a porosityfree structure can be achieved. Roy et al [18] claimed that pores were observed around TiB 2 particles.…”