Application of high-pressure torsion to Al-6 %Cu-0.4 %Zr alloy for ultrafine-grain refinement and superplasticity

Ultrafine-grained magnesium–lithium alloy processed by high-pressure torsion: Low-temperature superplasticity and potential for hydroforming

“…Following the pioneering works by Valiev et al [8][9][10], the occurrence of superplasticity was reported in different HPT-processed aluminum alloys (Al-1420 [11][12][13][14], Al-1421 [15], Al-1570 [16], Al-2024 [17], Al-7034 [18], Al-7075 [19,20], Al-3%Mg-0.2%Sc [21] and Al-6%Cu-0.4%Zr [22]), magnesium alloys (Zk60 [23,24], AZ61 [25], Mg-9%Al [26] and Mg-10%Gd [27]), titanium alloys (Ti6%Al-4%V [12,[28][29][30]), aluminum-copper alloys (Al-33%Cu [31]), copper alloys (Cu-0.1%Zr [32]), lead-tine alloys (Pb-62%Sn [33]), zinc-aluminum alloys (Zn-22%Al [33][34][35][36][37]), bismuth-tin alloys (Bi42%Sn [38]) and intermetallics (Ni 3 Al [11][12][13][39][40][41][42]). The occurrence of superplasticity was reported not only after HPT processing of thin disc specimens , but also after HPT processing of an Al-3%Mg-0.2%Sc alloy using the ring samples [43], bulk samples [44,45] as well as after continuous high-pressure torsion …”

Melt treatment of Al–Si foundry alloys with B and Sr additions

“…While wrought alloys can be grain refined in the solid state via thermomechanical processing [1][2][3][4][5][6], foundry alloys must be grain refined during casting. Grain refinement offers uniform structural features, superior mechanical properties, reduced shrinkage as well as better surface quality and is thus a key melt treatment in aluminium foundries [7].…”