Selection of Additive Elements Focusing on Impact Resistance in Practical TiAl Cast Alloys

Despite the widespread use of TiAl alloys in many fields, their poor impact resistance has recently emerged again as a major issue. Therefore, this study, practical effects additive elements were examined by considering most important property cast alloys. The was evaluated via Charpy test, which been rarely applied to alloys, revealing that only V, Cr, Mn, and B slightly improved resistance, compared Ti–Al binary alloy, both as-cast heat-treated states. In contrast, Nb, Mo, W, Fe, Ni, Si, C, N decreased resistance. If slight decrease is permitted, then Si C can improve creep strength, Nb W anti-oxidation These results confirm excellence developed considerable time ago, containing these addition B.