Abstract
In our previous study, we reported that the additions of 0.1 at.% Ag and 0.1 at.% Ca to Mg-2.4Zn-0.16Zr (at.%) alloy enhanced the age hardening response, and extruded alloy showed tensile yield strength of 325 MPa with the T6 heat treatment. Considering its excellent age hardenability, we attempted to develop high strength sheets from the alloy by twin-roll casting (TRC). TRC sheet of 2 mm in thickness were hot rolled to −1.2 mm. The TRC Mg-2.4Zn-0.1Ag-0.1Ca-0.16Zr alloy sheet showed tensile yield strength of ~ 320MPa and an elongation to failure of 17% after T6 heat treatment. EBSD study indicated the average grain size is ~ 18±2.5μm and the grains have a weak basal texture. TEM, showed a uniform distribution of ~5 nm diameter MgZn2 phase. The high yield strength was attributed to the dispersion of rod-like precipitates.
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Mendis, C.L., Bae, J.H., Kim, N.J., Hono, K. (2011). Mechanical Properties and Microstructures of Twin Roll Cast Mg-2.4Zn-0.1Ag-0.1Ca-0.16Zr Alloy. In: Sillekens, W.H., Agnew, S.R., Neelameggham, N.R., Mathaudhu, S.N. (eds) Magnesium Technology 2011. Springer, Cham. https://doi.org/10.1007/978-3-319-48223-1_50
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