Hot Deformation Behavior of LA43M Mg-Li Alloy via Hot Compression Tests

Hot Deformation Treatment of Grain-Modified Mg–Li Alloy

“…The calculated value was lower than those of the rolled single α-phase Mg–Li alloy (211 kJ/mol) [ 24 ], as-cast LAZ532 (160 kJ/mol) [ 3 ], commercial AZ80 alloy (216 kJ/mol) [ 36 ], extruded-state α(Mg)–β(Li) duplex phase Mg–Li alloy (148 kJ/mol) [ 37 ], as-cast Mg–2 Zn–0.3 Zr–0.9 Y alloy (236.2 kJ/mol) [ 38 ], and as-cast Mg–3 Sn–Ca alloy (236 kJ/mol) [ 39 ]. Despite being related to the other Mg–Li alloys with α + β duplex phases or a single β -phase, the deformation activation energy in the presented work was higher than those of the as-cast α + β alloy (127 kJ/mol) [ 40 ], the as-cast single β -phase Mg–Li alloy (95 kJ/mol) [ 41 ], the as-cast Mg–8 Li–3 Al–2 Zn alloy modified with Zr (108 kJ/mol) [ 8 ], the as-cast Mg–9 Li–1 Zn alloy (127 kJ/mol) [ 42 ], the as-cast Mg–11.5 Li–1.5 Al alloy (95 kJ/mol) [ 43 ], the as-cast Mg–3 Sn–2 Al–1 Zn–5 Li (139 kJ/mol) [ 44 , 45 ], the as-cast Mg–9 Li–3 Al alloy with Sr addition (110 kJ/mol) [ 46 ], and as-cast LA43M (110 kJ/mol) [ 4 ].…”

“…The compressive hot deformation study of as-cast LA43M alloy [ 4 ] provides information about similar regions in the processing maps, which are indicative of high-power dissipation capability. To confirm this interpretation for the three high-efficiency zones determined on the processing maps of the analyzed ultralight Mg–Li alloy, microstructural observations were carried out.…”

“…Magnesium–lithium ultra-light alloys, as a very light structure metal, have a low density, high specific strength and stiffness, good damping performance, and excellent formability [ 1 , 2 , 3 ]. These alloys have a broad application in numerous industries, such as electronics, military, aerospace, and automotive industries [ 4 , 5 , 6 ]. It is worth noting that, with an increasing volume of Li, the deformability of the Mg–Li alloy increases; however, the strength, thermal stability, creep resistance, and corrosion significantly decrease [ 7 , 8 ].…”

“…Numerous studies have been completed on the hot deformation behavior with duplex structured Mg–Li alloys; however, there is a dearth of research performed on single α (Mg) phase Mg–Li alloys. Li et al [ 4 ] analyzed the hot deformation behavior of an as-extruded single α -phase Mg–Li–Al alloy over a temperature and strain rate range of 250–350 °C and 0.0001–1 s −1 , respectively. Yang et al [ 21 ] presented results on the hot deformation behavior of an as-extruded duplex structured Mg–Li–Al alloy with Sr addition and proposed the optimum restrictions of hot forming.…”

Deformation Behavior and Dynamic Recrystallization of Mg-1Li-1Al Alloy

“…According to the binary phase diagram of the Mg-Li alloy, there are three types of structures with different lithium contents, which are α-Mg phase (less than 5.7 wt% Li), β-Li phase (more than 10.3 wt% Li), and duplex (α-Mg+β-Li phase) structures between 5.7 wt% and 10.3 wt% Li. When the content of lithium is less than 5.7%, the HCP structural Mg-Li alloy has lower c/a, thus improving the deformation ability at room temperature [9][10][11]. Unfortunately, the applications of Mg-Li alloys are limited due to their low strength and poor corrosion resistance.…”