Effect of La2O3 doping methods on the properties of MR14 plates
La2O3can refine grain size,pin dislocations,and improve the strength of molybdenum.Rhenium can re-duce the ductile brittle transition temperature of molybdenum,improve its strength and elongation performance.In order to fully utilize the fine grain strengthening effect of La2O3 and further improve the mechanical properties of MR 14 sheet,this article studied the effect of La2O3 doping methods on the properties of MR 14 alloy through three powder mixing processes:solid solid doping,solid liquid reduction doping,and liquid liquid doping.Research has shown that both solid-liquid reduction doping and liquid-liquid doping can refine grain size,improve microhard-ness and room temperature mechanical properties,with small performance differences and a 50％higher elongation than solid-liquid doped plates.
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