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研究了Mo添加对FeCoNiCrAl_(0.3)高熵合金组织的影响。分析了V元素对高熵合金FeCoNiCrMo_(0.5)Al_(0.3)Vx的组织和力学性能的影响。通过混合焓、混合熵、原子半径差、电负性、电子空位浓度以及晶格扭曲程度计算了FeCoNiCrMoVAl_(0.3)高熵合金相稳定性。结果表明:FeCoNiCrMo_(0.1)Al_(0.3)合金中Mo主要以固溶态的形式存在于合金中;而随Mo含量的增加,FCC基体中析出分布于枝晶间的(Cr,Mo)(Ni,Co)型σ相;V可进一步促进(Cr,V)型σ相的析出;高熵合金相稳定性的理论结果与试验结果吻合。
The effect of Mo addition on the microstructure of FeCoNiCrAl_ (0.3) high-entropy alloys was investigated. The effect of V element on the microstructure and mechanical properties of high-entropy FeCoNiCrMo_ (0.5) Al_ (0.3) Vx alloy was analyzed. The phase stability of FeCoNiCrMoVAl_ (0.3) high entropy alloy was calculated by mixing enthalpy, mixing entropy, atomic radius difference, electronegativity, electron vacancy concentration and degree of lattice distortion. The results show that Mo is mainly present in solid solution in the FeCoNiCrMo_ (0.1) Al_ (0.3) alloy. With the increase of Mo content, (Cr, Mo) (Ni , Co) type σ phase; V can further promote the precipitation of (Cr, V) type σ phase; the theoretical results of high entropy alloy phase stability are consistent with the experimental results.