DAMPING CAPACITY OF ZN-AL ALLOY SHEETS

The effect of cold rolling on the logarithmic decrement delta of Zn-Al /Zn-Al-0.02%Mg alloy containing less than 22% Al was investigate d. A logarithmic decrement delta of 85% for cold rolled Zn-15%Al/Zn-15%Al-0 .02%Mg alloy sheets was close in value to that of the same alloy sheet s water quenched from 573 K. With an increase in rolling reduction, th e value of delta was increased. As a result of tensile properties and hardness testing, the elongation was increased and the hardness was de creased with an increase in the rolling reduction for as-rolled alloys .