Weldability of High Strength Al-Zn-Mg Alloy (Report 1)
Aging Characteristics of Heat-Affected Zone
1967 Volume 36 Issue 8 Pages 854-861
Details
1967 Volume 36 Issue 8 Pages 854-861
A study has been made of aging characteristics of heat-affected zones in commercial Al-Zn-Mg alloy welds by means of hardness measurements. The work shows that in the material aged at room temperature the region where the temperature has reached 200°C and above during welding can be reversed, and the region heated to 140-200°C can be partially reversed. In this material the hardness of heat-affected zone can be fully restored by post-weld aging.
In the material previously aged at 130°C for 24 hrs. the region where the peak temperature exceeds 300°C can be re-solution treated, and the region heated to 200-300°C can be partially reversed and remains the weakest part in the heat-affected zone after post-weld aging.
