The phase composition, type II microstresses, and coherent scattering domains (CSDs) of multicomponent (medium- and high-entropy) bcc solid solutions with an average electron concentration, C_sd, ranging from 4.6 to 5.47 e/a were studied. The effect of these characteristics on the hardness and Young’s modulus was analyzed. The alloys were melted in a MIFI-9 vacuum arc furnace using components with a purity of at least 99.5 wt.%; the ingots were remelted six times. The hardness and Young’s modulus of the alloys were determined from nanoindentation curves plotted with a Micron Gamma unit under a load from 0.98 to 2.94 N using a Berkovich diamond pyramid under automated loading and unloading. A relatively small change in the quantitative chemical composition of the samples led to a noticeable change in the lattice parameter, type II microstresses, CSDs, microhardness, and Young’s modulus. The greatest possible type II microstresses and minimum CSD sizes were observed for the alloys characterized by high average mismatch between the atomic sizes of their constituent elements. Increase in the electron concentration in the alloys led to higher hardness and Young’s modulus and lower lattice parameter. Increase in the type II microstresses was also accompanied by higher hardness and Young’s modulus. The microhardness H of alloys significantly exceeded that calculated with the mixture rule, H_mix, and was determined by solid-solution hardening (∆H = H – H_mix ranging between 2.9 and 6.4 GPa). Type II microstresses precisely calculated from the X-ray line width can be used for measuring the distortion of the solidsolution lattice and assessing solid-solution hardening. The relationship between the magnitude of solid-solution hardening, Young’s modulus, and lattice microdistortions (type II microstresses) was proposed.

具有平均电子浓度C _sd的多组分（中熵和高熵）bcc固溶体的相组成，II型微应力和相干散射域（CSD）研究范围从4.6到5.47 e / a。分析了这些特性对硬度和杨氏模量的影响。合金在MIFI-9真空电弧炉中使用纯度至少为99.5 wt。％的组分熔化；铸锭被重熔了六次。合金的硬度和杨氏模量由纳米压痕曲线确定，该压痕曲线是用微米级伽玛单元在0.98至2.94 N的载荷下使用Berkovich金刚石金字塔在自动加载和卸载下绘制的。样品定量化学成分的相对较小变化导致晶格参数，II型微应力，CSD，显微硬度和杨氏模量发生明显变化。对于合金，观察到最大可能的II型微应力和最小的CSD尺寸，其特征是其构成元素的原子尺寸之间存在很高的平均失配。合金中电子浓度的增加导致较高的硬度和杨氏模量以及较低的晶格参数。II型微应力的增加还伴随着更高的硬度和杨氏模量。合金的显微硬度H大大超过了混合规则H所计算的显微硬度_混合，并通过固溶强化来确定（ΔH= H - ħ_混合测距GPA 2.9和6.4之间）。根据X射线线宽精确计算出的II型微应力可用于测量固溶体晶格的变形并评估固溶体的硬化。提出了固溶硬化幅度，杨氏模量和晶格微变形（II型微应力）之间的关系。