ABSTRACT An autogenously dissimilar Al0.1CoCrFeNi-high entropy alloy/stainless steel (i.e., AISI 304) weld joint was produced by an electron-beam welding technique. The weld metal followed mode A of solidification and resulted in a fully austenitic columnar dendritic microstructure due to rapid cooling and lower chromium equivalent to nickel equivalent (Creq/Nieq) ratio (1.12–1.14). Tensile test sample fractures at the base metal (Al0.1CoCrFeNi-high entropy alloy) and illustrates higher strength (the yield and ultimate strength of 310 ± 10 MPa and 560 ± 15 MPa, respectively) than that of Al0.1CoCrFeNi-high entropy alloy, ensuring the suitability of the electron-beam welding for the Al0.1CoCrFeNi-high entropy alloy/AISI 304 stainless steel joint structures designed with respect to Al0.1CoCrFeNi-HEA properties. The influence of the manufacturing process (electron beam welding) is highlighted in terms of microstructure and mechanical properties.

中文翻译：

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高熵合金和不锈钢的电子束焊接：显微组织和机械性能

摘要通过电子束焊接技术生产了一种自相异质的 Al0.1CoCrFeNi-高熵合金/不锈钢（即 AISI 304）焊接接头。由于快速冷却和较低的铬当量与镍当量 (Creq/Nieq) 比 (1.12–1.14)，焊缝金属遵循凝固模式 A，并导致完全奥氏体柱状枝晶微观结构。拉伸试样在母材（Al0.1CoCrFeNi-高熵合金）处断裂，强度（屈服强度和极限强度分别为 310±10 MPa 和 560±15 MPa）高于 Al0.1CoCrFeNi-高熵合金，确保电子束焊接适用于根据 Al0.1CoCrFeNi-HEA 特性设计的 Al0.1CoCrFeNi-高熵合金/AISI 304 不锈钢接头结构。