Microstructure evolution, mechanical properties and strengthening mechanism of refractory high-entropy alloy matrix composites with addition of TaC
作者： Qinqin Wei , Qiang Shen , Jian Zhang , Yin Zhang , Guoqiang Luo
DOI: 10.1016/J.JALLCOM.2018.11.111
关键词:
摘要: Abstract This study focuses on novel refractory MoNbRe0.5W(TaC)x high-entropy alloy matrix composites synthesized by vacuum arc melting. The microstructure evolution, compressive mechanical properties at room temperature and strengthening mechanism of the with addition TaC are analyzed discussed. consist a BCC solid solution as an eutectic (BCC multi-component carbide (Mo, Nb, W, Ta)C phases) grain boundaries. lamellar structure would be formed from decomposition subcarbide Ta)2C fully solubility Re. MoNbRe0.5W(TaC)0.5 composite has maximum failure strain 10.25%. to MoNbRe0.5W(TaC)0.6 exhibit excellent comprehensive properties, strength reasonable ductility temperature. reinforcement is dominated precipitation fine-grained effect. good contributed refinement phase.
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