AlLi

AlLi is a family of aluminum-lithium alloys that combine aluminum's light weight with lithium's density-reducing and strength-enhancing properties, resulting in materials significantly lighter than conventional aluminum alloys. These alloys are used primarily in aerospace structures where weight reduction directly improves fuel efficiency and payload capacity; they are also employed in high-performance sporting equipment and military applications where low density and high specific strength are critical. AlLi alloys are chosen over standard aluminum alloys when the cost premium of lithium alloying can be justified by weight savings and performance gains, though they require careful processing to manage lithium's reactivity and maintain damage tolerance.