Abstract
This paper focused on the effect of yttrium (Y) addition on oxidation resistance of AM50 alloy. The oxide scale on the surface was studied. Elemental Y in solid solution played an important role in improvement of oxidation resistance and formation of oxide scale. Yttrium (0.28 wt%) addition in AM50 alloy could greatly enhance the oxidation resistance. Furthermore, with increasing Y addition, the scale/substrate adherence was increased. However, when Y addition exceeded 0.28 wt%, it was decreased.
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