Super plasticity is the property of certain metallic materials that very high elongations without contraction till breakage can be achieved at suitable working conditions. These elongations are from few hundred to 1000% or even more. Such a method of working occurs at low strain rates, high working temperatures, and corresponding microstructure of material. Needed working stresses values are considerably lower than in working ordinary materials. Excellent work abilities enable wide range of applications of super plastic materials for various purposes.
The main groups of aluminum alloys which are the most often used in practice besides technically pure aluminum are AlMn, AlMg, AlMgMn, AlMgSi, AlZnMg, and AlZnMgCu alloys. These are wrought alloys which are shaped into products by rolling, extrusion, and forging. Each of the mentioned groups consists of numerous subgroups, depending on amounts of main and additional alloying elements, and they have tensile strength values varying in a wide range from 70 to 600 MPa.