Abstract
AbstractHot tearing susceptibility (HTS) of AZ31, AZ61, and AZ91 magnesium alloys was investigated with the constrained rod casting process at an average cooling rate of 1.5 K s−1. The experimental results showed that the maximum HTS that was associated with the AZ31 alloy resulted from the coarse dendrites and poor feeding ability during the final stages of solidification. The HTSs in the AZ91 and AZ61 alloys were much smaller, due to the finer microstructure and good feeding ability. The results were verified through examination of the as-cast microstructure, and simulation of the solidification process.
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