Microstructure of AZCa912 Continuous Casting Bar after Hot Compression

Abstract

AZCa912, 8.8mass%Al-0.68mass%Zn-0.25mass%Mn-1.9mass%Ca-Bal.Mg, continuous casting bars with 50 mm in diameter were formed by a direct chill continuous casting method. AZCa912 alloy is a noncombustible magnesium alloy. The surfaces of the bars had excellent metallic luster. A dendrite structure with a DAS of around 11-23 μm and grain sizes of about 200 μm was observed. Samples with almost the same grain size and different DAS were measured at hot compression test at 250-350°C, 0.01-1/s. Crack on the side surfaces of the samples were not formed by compression at 350°C, 0.01-0.1/s. All samples had an unchanged casting structure after hot pressing, and the percent of the structure remaining unchanged decreased with low-temperature compression and wide DAS.

Mechanical Property of Magnesium Alloy Surface with Dense Oxide

“…Magnesium alloys of light metals have attracted much attention as a structural material because of their excellent light weight and high mechanical properties [1][2][3]. In the present work, we formed AZCa912 continuous casting bars and measured their compressive properties [4][5][6]. Some samples had an unchanged casting structure and a dendrite structure.…”

Deformation Property of Dense Oxide Coated Magnesium Alloy Surface

“…Expectations are high for light metal magnesium alloys as structural materials for transportation equipment due to their extreme lightness and high mechanical properties [1][2][3]. In our previous studies, we formed AZCa912 continuous cast bars, and measured their compressive properties [4]. Some samples had cast and dendrite structures that remained unchanged after hot deformation.…”