Enhanced yield symmetry and strength-ductility balance of caliber-rolled Mg–6Zn-0.5Zr with ultrafine-grained structure and bulk dimension

A New Ultra-High-Strength AB83 Alloy by Combining Extrusion and Caliber Rolling

“…Additionally, the TYS of the CRed AB83 alloy was higher than those of the newly developed Mg-6Bi [16], BAZ811 [15], and Mg-8Al-4Sn-2Zn [4] alloys. Furthermore, the YS of the CRed AB83 alloy was higher than those of the previously reported 12-pass ECAPed Mg-3.7Al-1.8Ca-0.4Mn [19], DEed Mg-0.5Ca [10], 6-pass CRed ZK60 [28], HRDSRed AZ91 [23], 20-pass MDFed AZ61 [22], and RE-containing Mg-8Gd-3Y-1Zn wrought alloy [34]. The high strength of the CRed AB83 alloy was mainly due to the synthetic effect of the following factors: grain refinement of the ultra-fine DRXed grains, precipitation strengthening resulting from the fine Mg 3 Bi 2 and Mg 17 Al 12 precipitates, dispersion strengthening from the undissolved Mg 3 Bi 2 and Mg 17 Al 12 particles, and the solid-solution strengthening promoted by dissolved Al.…”

“…In addition, the necklace bimodal microstructure with more random basal texture benefits from the glide dislocation on basal planes, which makes the CRed AB83 alloy more ductile [42,43]. As shown in Figure 9, even though the EL of CRed AB83 was lower than that of as-extruded AB83, the ductility of the first (~11.8%) was one of the highest recorded for ultra-high strength Mg alloys [4,5,10,11,15,16,19,20,[22][23][24][27][28][29]31,33,34,37,38]. Compared with the newly developed highstrength Mg-3.5Al-3.3Ca-0.4Mn [5] and Mg-2Sn-2Ca [31] alloys, which were reported to have the two highest YS among RE-free Mg alloys, the CRed AB83 alloy showed a slightly lower YS but a much greater EL.…”

“…Subsequently, a highly ductile Mg-1.32Bi-0.72Ca alloy having an EL of~43% was successfully developed Table 1. Mechanical performance of caliber-rolled (CRed) Mg alloys compared with the corresponding as-extruded samples [26][27][28][29]. TYS: tensile yield strength, UTS: ultimate tensile strength, El: tensile elongation.…”

“…Mechanical performance of CRed Mg alloys compared with corresponding as-extruded sample[26][27][28][29].…”

Enhancing the Mechanical Properties of AZ80 Alloy by Combining Extrusion and Three Pass Calibre Rolling

“…Lee et al [19] reported that seven pass CRed AZ31 alloy demonstrated TYS, UTS, and EL of 298 MPa, 378 MPa, and 20.9%, respectively. Later, they further [20] fabricated a ZK60 alloy with an ultra-fine-grain structure yielding a UTS of 389 MPa and an EL of 18% by six pass caliber rolling with an area reduction of 84%. All these works demonstrate the great potential of caliber rolling in enhancing the mechanical performance of Mg alloy, but the number of caliber rolling pass applied is too many, leading to the decrease of production efficiency and increase of cost.…”