Enhanced ductility of Mg–1Zn–0.2Zr alloy with dilute Ca addition achieved by activation of non-basal slip and twinning

Lean Wrought Magnesium Alloys

“…An increase in ductility was also found in ref. [ 82 ], where annealed sheets from Mg-1.2Zn-0.2Zr with and without Ca additions (0.4 wt.%) were compared. By Ca additions, a weak double peak texture was formed and the activation of {10 2} twinning and pyramidal <c+a> slip was promoted.…”

“…While the Ca containing sheets showed improved ductility and higher UTS, the mechanical anisotropy increased. In particular, the YS varied up to 50 MPa, depending on the testing direction, while the mechanical properties of the ZK10 alloy were more uniform overall [ 82 ].…”

“…at 440 C for 1 h and w.q., hot rolled with 5 passes at 300 C to a overall reduction of 50%, intermediate reheating between the passes at 300 C for 0.3 h, annealing at 440 C for 0.5 h and w.q. Mg-1.2Zn-0.4Ca-0.2Zr rolled, O, RD 229.6 ± 2.8 264.0 ± 2.2 24.7 ± 2.4 [ 82 ] cast, hom. at 400 C for 4 h w.q., machined, rolled at 300 C (5 passes, with intermediate annealing, total reduction 72%), subseq.…”

“…at 400 C for 4 h w.q., machined, rolled at 300 C (5 passes, with intermediate annealing, total reduction 72%), subseq. annealed at 300 C for 0.5 h rolled, O, 45 290.8 ± 2.7 247.3 ± 0.2 32.3 ± 1.5 [ 82 ] rolled, O, TD 171.3 ± 2.2 248.9 ± 2.5 27.5 ± 1.8 [ 82 ] Mg-1.4Zn-0.1MM-0.1Zr extr., O 200 ± 7 250 ± 5 15.3 ± 0.3 150 ± 6 441 ± 3 [ 83 ] cast, pre-heated at 340 C, extr. (direct) to round bars at 300 C, air cooled, annealed at 300 C for 0.5 h Mg-1.4Zn-0.1MM-0.1Zr-0.4Ca extr., O 171 ± 2 243 ± 1 14.6 ± 0.0 …”

“… 221 260 21 156 381 [ 93 ] as above, using a speed of 5 m min as-extr. 201 251 19 142 369 [ 93 ] as above, using a speed of 10 m min Mg-1.2Zn-0.2Zr rolled, O, RD 211.6 ± 2.3 247.4 ± 2.7 19.8 ± 1.6 [ 82 ] cast, hom. at 400 C for 4 h w.q., machined, rolled at 300 C (5 passes, with intermediate annealing, total reduction 72%), subseq.…”