Refractory high-entropy alloys (HEAs) possess outstanding mechanical strength at room and high temperature but lack the room temperature ductility. A novel refractory equiatomic powder combination of WMoVCrTa was selected and verified for the feasibility of formation of solid solutions or else bulk-metallic glasses (BMGs) in the alloy based on the Guo et al.’s criteria and mismatch entropy criterion. The powder combination satisfies the above two criteria to crystallize in solid solution phases and inhibit the BMGs. Mechanical alloying characteristics of the powder mixture were determined. The particle size of the powder mixture decreased continuously during initial milling and later increased after 32 h of mechanical alloying. A homogeneous mixture was obtained after milling for 64 h. Crystallite sizes of the constituent elements in the powder mixture decreased continuously on progressive milling. A nanocrystalline powder was obtained by mechanical alloying. The powder milled for 64 h revealed a major BCC1, a minor BCC2 and small unknown phases. The lattice parameters of those BCC1 and BCC2 phases are 3.16 Å and 2.88 Å respectively. The alloy ingots were fabricated from the milled powder by vacuum arc melting technique followed by heat treatment. The ingot crystallizes in three phases such as a major BCC1, a minor BCC2 and a minor laves phase. The lattice parameters of these BCC1 and BCC2 phases are 3.05 Å and 2.85 Å respectively. Thereby, the BCC1 lattice of the milled powder contracts slightly after ingot fabrication. A fine combination of compressive stress and strain of 995 MPa and 6.2% respectively was achieved by the alloy at room temperature. Vickers hardness of the alloy was as high as 773 ± 20HV0.5. The density of the alloy was 11.52 g/cm³. The combination of excellent room temperature stress-strain and high hardness properties can enable the refractory HEA as a potential candidate for structural applications.

难熔高熵合金（HEA）在室温和高温下具有出色的机械强度，但缺乏室温延展性。选择了一种新型的WMoVCrTa耐火等原子粉末组合，并根据Guo等人的标准和失配熵标准验证了在合金中形成固溶体或块状金属玻璃（BMG）的可行性。该粉末组合满足以上两个条件以在固溶体相中结晶并抑制BMG。测定了粉末混合物的机械合金化特性。粉末混合物的粒度在初始研磨过程中连续减小，而在机械合金化32小时后又增加。研磨64小时后获得均匀混合物。粉末混合物中构成元素的微晶尺寸在逐步研磨时连续降低。通过机械合金化获得纳米晶体粉末。研磨64小时的粉末显示出主要的BCC1，次要的BCC2和小的未知相。这些BCC1和BCC2相的晶格参数分别为3.16Å和2.88Å。通过真空电弧熔化技术，然后进行热处理，由研磨的粉末制造合金锭。铸锭以三个阶段结晶，例如主要的BCC1，次要的BCC2和次要的Laves相。这些BCC1和BCC2相的晶格参数分别为3.05Å和2.85Å。因此，研磨后的粉末的BCC1晶格在铸锭制造后稍微收缩。压缩应力和995 MPa和6的应变的良好组合。该合金在室温下分别达到2％。合金的维氏硬度高达773±20HV0.5。合金的密度为11.52 g / cm³。出色的室温应力应变和高硬度性能的结合，可使耐火HEA成为结构应用的潜在候选者。