Effect of High Cerium and Lanthanum on Impact Toughness of Al-11Si-Cu Eutectic Cast Alloy

Abstract

The effect of additive elements on impact toughness of Al-11Si-Cu alloy was investigated. The impact test bars were used as impact specimens. The energy of Al-11Si-Cu was improved with Sr modifier addition. The high ability of Ce and La to form large structure intermetallic in Al-Si-Cu will reduce the energy. The RE-intermetallic has an effect on impact analysis, which facilitates to increase the porosity pore.

The Effect of Chromium Addition on Fluidity, Microstructure and Mechanical Properties of Aluminium LM6 Cast Alloy

“…The impact toughness of Al-Si alloys is controlled to a significant extent by the morphology and size of the eutectic Si particles, as well as by the size of the α-Al dendrites. The size and morphology of the intermetallic phases which form in the interdendritic regions between aluminum and the alloying additives also have a strong influence on the impact toughness of Al-Si [9,10]. The castability/ fluidity is an important feature since it limits the wall thickness that can be successfully filled.…”