Tailoring the Rolling Texture of AZ31 Mg Alloy with Calcium and Tin Addition

Abstract

A small amount of Ca and Sn is added into AZ31 alloy separately to modify its deformation behavior and optimized rolling texture. Results show that addition of Sn increases the activation of twinning in AZ31. Some unusual double twins, inducing {101¯2}‐true{10true1¯2true} and {101¯3}‐true{10true1¯2true} double twins, are activated in AZ31–0.5Sn alloy. Refined grains with similar orientation as their parents are produced by continuous static recrystallization, which limits texture modification in AZT310. Ca gives rise to a remarkable grain refinement during hot rolling. Recrystallized grains in AZX310 exhibit a weaker double peak texture with a wide orientation spread. It is found that Al2Ca particles simulate recrystallized nucleation and some of these refined grains exhibit non‐basal orientations. Primary compression twins are favorable nucleation sites for recrystallization and they are more effective in texture modification compared to other double twins.

Effect of CaO Content and Annealing Treatment on the Room-Temperature Mechanical Properties of AZ61 and AZ61-CaO Alloys

“…Therefore, other elements, such as calcium, are added, thereby creating thermally stable intermetallic particles with Al (Al 2 Ca) and limiting the formation of the thermally unstable Mg 17 Al 12 phase. It has previously been shown that the addition of Ca in AZ31 Mg alloy softened prismatic slips and the difference between CRSS basal and CRSS prismatic decreased considerably [34,[44][45][46][47][48][49][50]. Although Ca is relatively more cost-effective than RE elements, it is crucial to consider that both the extraction of elemental Ca and the integration of Mg-Ca master alloy can increase production costs.…”