Superplastic deformation behavior of twin-roll cast Mg–6Zn–1Mn–1Al alloy

Grain refinement of Mg–Al cast alloy by the addition of manganese carbonate

“…This suggests that the Al 8 Mn 5 phase has strong and coherent bonding with ␣-Mg, leading to a positive grain refining effect. Besides positive grain refining effect via heterogeneous nucleation, the addition of MnCO 3 provides an additional advantage, i.e., the melt agitation effect of carbon dioxide gas generated by reaction (2). As noted before, the majority of carbon dioxide gas reacts with the melt immediately after the decomposition of MnCO 3 , but the remaining gas is released into the air, accompanied with agitation of the melt.…”

“…The demand for magnesium alloys, one of the lightest structural materials, has steadily increased in the automobile industry during the past two decades in accordance with efforts to reduce fuel consumption. However, the poor ductility and formability of magnesium alloys restrict expansion of their application area; the main issue that must then be confronted to how to improve them without sacrificing other mechanical properties [1][2][3][4]. Grain refinement is an effective way to improve the mechanical properties of both cast and wrought magnesium alloys.…”

Coupled analysis of temperature and flow during twin-roll casting of magnesium alloy strip

“…Park et al (2009) reported that the metal melt was subjected to plastic deformation during rapid solidification, 10 2 -10 3 • C/s, which was 2-3 orders of magnitude higher than that of the conventional ingot casting. Allen et al (2001) suggested that the twin-roll casting AZ31 magnesium alloy exhibited homogeneity of microstructure, refined grain size, reduced segregation and a dense distribution of fine particles within the solid solution.…”

Microstructure and mechanical properties of Mg–Al–Mn–Ca alloy sheet produced by twin roll casting and sequential warm rolling

“…Recently, twin roll casting (TRC) is paid a great attention on economically fabricating wrought magnesium alloy sheets from the melt [6][7][8][9][10][11][12], which combines continuous strip casting and direct hot rolling into a single step, having an advantage of one-step processing for flat rolled products. Besides being such a costeffective process, TRC process also has benefit effects on resulting microstructure such as reducing segregation, improving inclusion size distribution and refining microstructural homogeneity.…”