Effect of aging treatment on the damping capacity and mechanical properties of Mg-6Al-1Zn alloy.
The damping capacity and mechanical properties of Mg-6Al-1Zn alloy after heat treatment were investigated. The damping characteristics of un-heat-treated, solution treated, and aged Mg-6Al-1Zn specimens were determined by measuring the damping ratio and the logarithmic decrement of free vibrations of a bending beam clamped at one side. The microstructural evaluations confirmed that the β-Mg17Al12 phase was reprecipitated after aging and increased with an increase in aging time. The peak level of damping ratio and logarithmic decrement was obtained after 34 hr of aging time, over which the damping capacity declined according to increasing amount of strong pining points.
Mechanical Engineering Department, Faculty of Engineering-Rabigh, King Abdulaziz University, P.O. Box 344, Rabigh 21911, Saudi Arabia ; Mechanical Engineering Department, Faculty of Engineering-Helwan, Helwan University, 1st Sherif Street, Helwan, Cairo 11792, Egypt.
Abdel-Wahab
AW
El-Morsy
Plastic Deformation Department, Central Metallurgical Research and Development Institute, 1st Elfelezat Street, El-Tebbin, Helwan 12422, Egypt.
Ahmed I Z
AI
Farahat