How does the addition of magnesium affect the properties of aluminum alloys?

The addition of magnesium to aluminum alloys significantly improves their mechanical properties, particularly strength and rigidity. Magnesium enhances the alloy's resistance to corrosion and increases its formability. It also contributes to better weldability and reduces the likelihood of hot cracking during the welding process. However, the addition of magnesium can also lead to a decrease in electrical conductivity and may increase the alloy's susceptibility to stress corrosion cracking. The overall effect of magnesium on aluminum alloys is to create a material that is lighter, stronger, and more resistant to environmental degradation, making it suitable for various applications in the aerospace, automotive, and construction industries.