Abstract
In order to obtain the data useful for investigating the mechanism of age-hardening,a study was made with a Mg-Pb alloy containing 30%Pb. The alloy was,at first,quenched from 450° in water after being heated at that temperature for a week. Then the changes in lattice constants and hardness of the alloy were measured during the aging at 200°. And the variations in length and electric resistance on heating and cooling were observed.
The results lead to the following conclusions: With the progress of aging,the hardening is considerably pronounced before precipitates of Mg2Pb are found,and the number of precipitated phase is only one (continuous precipitation) as in the case of Al-Cu alloys.
