Large-size high-strength and high-ductility AlCoCrFeNi2.1 eutectic high-entropy alloy produced by hot-rolling and subsequent aging

Hot deformation behavior and constitutive modeling of a cost-effective Al8Cr12Mn25Ni20Fe35 high-entropy alloy

“…Li and Raabe [34] proposed a processing regime for 3D transition metal HEAs. The processing includes homogenization at a temperature of 1200 °C for 2-5 h to obtain a compositionally homogenous structure, followed by hot forming at high temperatures that enhanced the strength and ductility [3]. Table 5 lists the homogenization temperatures and durations for some of the previously studied HEAs.…”

“…Contradicting the concept of the conventional alloy system, which is based on one principal element, and enhancing the properties by adding relatively small amounts of other elements, HEAs mix elements with high atomic percentages ranging from 5 to 35 at %, thereby considering all elements as principal. HEAs are attracting increasing interest for advanced functional applications [2] owing to their remarkable mechanical properties, which could for example, overcome the strength-ductility paradox associated with traditional alloys [3,4] and enhance high-temperature properties [5]. This new concept represents a paradigm shift in the revolution of alloy development, and research in this field is extensively increasing worldwide.…”

Electron beam welding of AlCoCrFeNi2.1 high entropy alloy to EN 1.4301 austenitic steel

“…In addition to favorable mechanical properties [5,6], they are characterized by excellent castability, which contributes to the idea of future use in industry. However, to be able to use high entropy materials, it is necessary to verify their technological properties.…”

On the Short-Time Thermal Phase-Stability of As-Cast Alcocrfeni2.1 Eutectic High Entropy Alloy

“…Furthermore, the as-cast microstructure was developed into an heterogeneous one and an acceptable strength-ductility balance was achieved [9e11]. The previous research indicated that the as-cast microstructure of AlCoCrFeNi 2.1 EHEA through the hot-rolling and subsequent aging could achieve outstanding tensile properties, which is comparable with the cold-rolled microstructure due to the formation of B 2 precipitates during the long-term aging treatment [12]. The formation of the needle shape B 2 ordered phase during the heat treatment of EHEA was considered as a decisive concept in respect to thermal and mechanical stability.…”