Rapid solidification processing of 7XXX aluminium alloys: A review

Abstract A review is presented of the development of 7XXX aluminum alloys produced by rapid solidification processing. The relevant parameters of the rapid solidification techniques discussed are presented, as well as the resulting mechanical properties of the rapidly solidified alloys. The motivation behind the research on rapidly solidified aluminum and other classes of alloys is superior structure control and enhanced alloying capabilities, resulting in improved properties. The best tensile properties of 7XXX RS aluminum alloys are summarized and compared. On the basis of such a performance it should be evident that continued research and development is vital in order that toughness properties and crack growth rates also be optimized through further improvements in structure, in particular to achieve significantly greater control of the oxide content and its distribution. Processing control appears to be the most viable route at present.