Abstract
Welding response of two advanced aluminiumlithium (Al-Li) alloys was studied in terms of metallurgical and mechanical properties. The first alloy Al-Li 2195 contains Li metal by weight ~1.1%, whereas the second alloy Al-Li 2060 contains ~0.7% Li. Rolled sheets of 2 mm thickness in T8 temper were utilized to fabricate the butt joints with the help of two different welding techniques, namely the laser beam welding and the friction stir welding. The welding was performed perpendicular to the rolling direction with similar processing conditions in each case. Microstructure examination and tensile tests of the fabricated joints in as-weld condition were performed and the results were compared with that of the base metal. The results showed that the joints of Al-Li 2060 alloy performed mechanically slightly better than the Al-Li 2195 alloy.

Naveed Akhtar, H. J. Jin, S. J. Wu. (2018) Aerospace Grade Aluminum Lithium Material and Its Welding Characteristics, Journal of Space Technology , Volume 8, Issue 1.
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