Abstract:The effect of second phases on the creep behavior of Mg-Ca-Zr alloys was investigated. Casting and hot-extrusion processes were performed to prepare Mg-xCa-0.5Zr (x = 0 wt.%, 0.3 wt.% and 0.6 wt.%) alloys with different morphologies and distributions of second phases. The as-cast microstructures of Mg-Ca-Zr alloys consisted of an Mg matrix and coarse Mg 2 Ca intermetallic compounds distributed at the grain boundaries. The hot-extruded microstructures exhibited finer Mg 2 Ca spherical particles and precipitates… Show more
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