Fig. 1 Optical micrograph of the homogenized AZ80 alloy specimen: b magnified micrographs from the rectangular frame in a, c magnified micrographs from the rectangular frame in b

Fig. 2 Macro- and microstructure of the MDF samples: a P1-sample, b P2-sample. c, d Magnified micrographs from the rectangular frame in as signed by rectangular frames in the a, b, respectively

Fig. 3 Micro-area of P14-sample measured by EPMA

Fig. 4 Microstructures of the forged sample with different aging treatments: a P1-sample, b P1-sample after aged at 170 °C for 10 h, c P1-sample after aged at 170 °C for 30 h, d P2-sample, e P2-sample after aged at 170 °C for 10 h, f P2-sample after aged at 170 °C for 30 h

Fig. 5 Microstructures of P1 with aged at 170 °C for 10 h: b, c magnified micrographs from the rectangular frame in as signed by rectangular frames in the a

Fig. 6 Microstructures of P1 with aged at 170 °C for 30 h: b magnified micrographs from the rectangular frame in as signed by rectangular frames in the a

Fig. 7 Microstructures of P1 with aged at 170 °C for 10 h: b magnified micrographs from the rectangular frame in as signed by rectangular frames in the a

Fig. 8 Microstructures of P2 with aged at 170 °C for 30 h: b, c magnified micrographs from the rectangular frame in as signed by rectangular frames in the a

Fig. 9 Typical DSC scan at a heating rate of 5 °C/min of the as-cast AZ80