Effect of Zirconium and Lanthanides on the Recovery in 2618 Base Aluminum Alloys

Abstract

Influence of zirconium and lanthanides on structure and properties of 2618 base aluminum alloys, used at elevated temperatures, are presented in this work. The recovery was determined through the change in the microhardness with time and temperature on different zirconium and lanthanides contents. It was used for evaluation of creep-resistance of the alloys. It is possible to predict the optimal chemical composition of alloy to provide good mechanical properties at elevated temperatures.
Zirconium exhibited to retard the recovery at lower temperature, 150-250°C, whereas lanthanides do higher temperature 300-350°C.