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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