Investigations on the effects of Be and Li on the microstructure and tensile properties of Al319 alloy

In this work, the effects of Be and Li on the microstructure and tensile properties of A319 aluminium casting alloy containing 1wt.% Fe have been studied. It was found that Be and Li addition decreases the length of beta phase and improves tensile properties of the alloy. Moreover, Be addition changes the Fe-intermetallic from β-Al5FeSi into the Chinese script α-Al8Fe2Si compound. But, it was concluded that Li is more effective in enhancing the tensile properties of the alloy.

Keywords:

aluminium alloy A319 , beta phase , tensile properties , modifying , quality index