Abstract
The subject of this study is the presentation of relation between the
degree of structure fineness and ultrasonic wave damping
coefficient for the high-zinc aluminium alloys represented in this study by
the sand mould cast alloy Al - 20 wt% Zn (AlZn20). The
studied alloy was refined with a modifying (Al,Zn)-Ti3 ternary master alloy,
introducing Ti in the amount of 400 pm into metal. Based on the analysis
of the initial and modified alloy macrostructure images and ultrasonic
testing, it was found that the addition of (Al,Zn)-Ti3 master alloy,
alongside a significant fragmentation of grains, does not reduce the
coefficient of ultrasonic waves with a frequency of 1 MHz.
Go to article