Abstract
In the present study, a Mg–8Al–0.5Zn (AZ80) Mg alloy was subjected to water quenching and furnace cooling from the solution treatment temperature of 390 °C. Subsequently, all the samples were subjected to aging treatment at 250 °C. The precipitation behavior, aging response and fracture phenomenon of the AZ80 Mg alloy were evaluated to establish the correlation among the cooling rates after solution treatment, microstructural features and mechanical properties. Scanning electron microscopy depicted a very distinct precipitation behavior of aged specimens. The observed variation in the aging curves was rationalized based on this. Fractographic analysis on the as-solutionized and aged alloys revealed that the initiation of fracture (i.e., intergranular or transgranular) was dictated by the presence of microstructural features, such as precipitates (continuous and discontinuous), twins and grain boundaries. The fracture strain was correlated with the number density and size of voids formed during tensile loading.
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Zindal, A., Vashishtha, H., Singh, S.S. et al. Effect of Cooling Rates from Solution Treatment Temperature on Aging Response and Fracture Behavior of a Mg–8Al–0.5Zn Alloy. Met. Mater. Int. 28, 618–627 (2022). https://doi.org/10.1007/s12540-020-00911-6
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DOI: https://doi.org/10.1007/s12540-020-00911-6