A novel nanoindentation mapping technique was employed to correlate the microstructure, composition and mechanical properties of the fcc, laves and lamellae in CoCrNiMo_x high-entropy alloys with varying Mo content. The results suggest that the Young's modulus of the 3 constituents were comparable, averaging ≈230 GPa. Despite this, the hardness was quite different. The fcc phase in CoCrNiMo_x was mainly strengthened by a solute strengthening mechanism, and the hardness was increased from ≈3.98 GPa to ≈4.45 GPa, as the atomic percentage of Mo in fcc increased from ≈7.4% to 15.4%. A solute strengthening model a accounting lattice distortion was employed to correlate the strengthening effect in fcc with Mo content. The laves phase was rich in Mo composition (≈28.6%) and exhibited an ultrahigh hardness, ≈9.13 GPa, which was ≈2 times higher than that of fcc phase. Finally, the lamellae colonies, made up by alternative fcc and laves phases, had an intermediate hardness, ≈6.36 GPa. This was well explained by a rule-of-mixture model.

一种新颖的纳米压痕测绘技术被用来关联Mo含量不同的CoCrNiMo _x高熵合金中fcc，熔渣和片晶的微观结构，组成和力学性能。结果表明，这三种成分的杨氏模量相当，平均≈230GPa。尽管如此，硬度还是有很大不同。CoCrNiMo _x中的fcc相钼主要通过溶质强化机制得到强化，并且随着fcc中Mo的原子百分比从≈7.4％增加到15.4％，硬度从≈3.98GPa增加到≈4.45GPa。采用考虑晶格畸变的溶质强化模型，将fcc的强化效果与Mo含量相关联。Laves相含有丰富的Mo成分（约28.6％），并且具有超高硬度，约9.13 GPa，是fcc相的约2倍。最后，由交替的fcc和laves相组成的片状菌落具有中等硬度，≈6.36GPa。混合规则模型很好地解释了这一点。