A novel equiatomic FeCoCrMnW-based High Entropy Alloy system has been designed with the help of well-established thermodynamic parameters as well as a unique learning strategy based on multi-criteria decision-making tool named ‘TOPSIS’. The present study describes the effect of W addition on as-cast FeCoCrMnW_x HEAs on their phase identities and mechanical properties. The results showed that the as-cast FeCoCrMnW_x (molar ratio x = 0.2, 0.4, 0.6, 0.8, 1) HEAs were composed of BCC, FCC and several minor Fe–Cr and Co–Cr type σ phases. Transmission Electron Microscopy (TEM) analysis confirms the formation of potentially-embrittling intermetallic phases in minor amounts. The designed HEAs exhibit desirable compressive fracture strength of 1771 MPa and compressive plasticity of 17.1% at room temperature. Hike in Vickers microhardness and compressive strength values could be attributed to a large atomic radius of ‘W’ which further plays a crucial role in grain refinement and solid solution strengthening. This work not only provides advancement in decision making studies of HEAs with new and essential perspectives but also reveals possibly concealed relationships amongst some critical belief in the field of material science.

在完善的热力学参数以及基于多准则决策工具“ TOPSIS”的独特学习策略的帮助下，设计了基于FeCoCrMnW的基于等原子的新型高熵合金系统。本研究描述了添加的W对铸态FeCoCrMnW _x HEA的相身份和力学性能的影响。结果表明，铸态的FeCoCrMnW _x（摩尔比x = 0.2、0.4、0.6、0.8、1）HEA由BCC，FCC和几个次要的Fe-Cr和Co-Cr型σ相组成。透射电子显微镜（TEM）分析证实了少量潜在潜在的金属间相的形成。设计的HEA在室温下表现出理想的1771 MPa压缩断裂强度和17.1％的压缩塑性。维氏硬度的增加是由于“ W”的大原子半径引起的，其显微硬度和抗压强度值在晶粒细化和固溶强化中起着至关重要的作用。这项工作不仅以新的和必不可少的观点为HEA决策研究提供了进步，而且还揭示了材料科学领域中某些批判性信念之间可能隐藏的关系。