Abstract
The effect of hydrogen on the mechanical properties of cast Al-Al 2 O 3 composites, containing 2, 4 and 8 wt.% Al 2 O 3 , prepared by vortex casting process was assessed by tensile testing hydrogen pre-charged specimens. Hydrogen charging reduced both ductility and ultimate tensile strength of the composites. The degree of hydrogen embrittlement was lower in composites compared with the base metal. The hydrogen embrittlement behaviour is explained by considering the reversible and irreversible trap sites in the composites
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