Electromagnetic Casting Influence on the Mechanical Properties of as-cast 7075 Al alloy

Abstract

One of the novel processes aimed to obtain the better quality of aluminum alloys is the application of the electromagnetic field during the casting process. The better ingot surface together with the homongeous fine-grained microstructure guarantees the better mechanical properties of the ingot. The mechanical characteristics, such as elongation, reduction area, yield point, tensile strength as well as flow curves, were determined using computerized materials testing machine Zwick/Roel Z 100. The hardness vas determined according to Brinell hardness test. The three sets of samples were used - two sets casted with the presence of electromagnetic field, but with different operating conditions and one set of samples obtained without electromagnetic field (EMF) presence. Besides the EMF influence, the examinations revealed the ingot diameter influence on the mechanical characteristics of the 7075 Al-alloy.