The existence of coarse Fe-bearing phases and macro-segregation under the twin-roll casting (TRC) condition has always been a restrictive factor for preparation high-performance Al alloys. In this work, effect Mn contents on formation phases, behavior mechanical properties TRC Al-0.5Mg-0.7Si-0.1Fe-xMn (x = 0, 0.1, 0.3 0.5 wt.%) alloys have investigated. region in as-cast 0Mn alloy is found to c...