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Cast CrCoNiAlx (x=0–1.2) medium-entropy alloys (MEAs) were produced by arc melting and flip cast to investigate the alloying effect of Al addition on the microstructure, phase constituent and mechanical properties. The crystal structure changes from an initial face-centered cubic (FCC) to duplex FCC and body-centered cubic (BCC) and finally a single BCC with increasing Al content. In the duplex region,...
The effects of trace Y and Ce additions on the microstructure and mechanical properties of extruded Mg–Zn–Zr alloy sheets were investigated. Results indicated that Y and Ce additions led to significant grain refinement and to the formation of Mg–Zn–Ce, Mg3Zn6Y (I-phase) and Mg3Zn3Y2 (W-phase). Mg–Zn–Ce and W-phase were found to possess an orthorhombic and a face centered cubic structure, respectively...
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