Abstract
This study examined the microstructural, mechanical, and corrosion behaviors of a multidirectional-forged (MDF) Mg–Zn–Ca alloy. The results showed significant grain refinement of the alloy after 5 passes of the MDF process from 378[Formula: see text][Formula: see text]m to 23[Formula: see text][Formula: see text]m. X-ray diffraction analysis (XRD) revealed the presence of finer Mg7Zn3 phases and [Formula: see text]-Mg and Ca5Zn3 phases after the MDF process and peak shift and broadening. Higher hardness ([Formula: see text]) was noticed in the MDF 3 pass sample due to grain refinement; further hardness slightly decreased due to texture softening. Moreover, the results of the in vitro corrosion experiments conducted in SBF solution showed that the corrosion current densities of the alloys move in a noble direction as the number of MDF passes increases. MDF 3 pass sample (0.00523[Formula: see text]mm/y) showed the lowest degradation rates compared to the as-cast sample (0.01154[Formula: see text]mm/y), attributed to refining and redistributing the second phases.
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