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引言铝含量为7—15%(wt.)的Ti—Al合金,在时效时会析出有序、共格的α_2相(以Ti_3Al为基,具有DO_(19)有序点阵结构)。这些合金中的沉淀强化一般伴随有塑性的严重损失,这是由于大平面滑移带的形成,导致
Introduction Ti-Al alloys with 7-15% (wt.) Aluminum content precipitate an ordered and coherent α_2 phase (Ti_3Al-based, DO_ (19) ordered lattice structure) during aging. Precipitation strengthening in these alloys is generally accompanied by severe plastic loss due to the formation of a large plane slip band leading to