Effects of current density on the mechanical properties and microstructures of CoCrFeNiMn high-entropy alloy

Yang, Zhiqin; Son, Sujung; Ding, Chaogang; Xu, Jie; Shan, Debin; Guo, Bin; Kim, Hyoung Seop

doi:10.1016/j.jmrt.2024.01.213

Cited by 2 publications

(1 citation statement)

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“…High-entropy alloys (HEAs) have garnered significant attention due to their outstanding properties [ 1 , 2 , 3 ]. Among the plethora of developed HEAs, eutectic high-entropy alloys (EHEAs) have emerged as particularly noteworthy owing to the incorporation of eutectic structures comprising soft and hard phases [ 4 , 5 ].…”

Section: Introductionmentioning

confidence: 99%

Microstructure Evolution and Mechanical Properties of AlCoCrFeNi2.1 Eutectic High-Entropy Alloys Processed by High-Pressure Torsion

Wang,

Ding,

Yang

et al. 2024

Materials

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High-entropy alloys (HEAs) have garnered significant attention for their exceptional properties, with eutectic high-entropy alloys (EHEAs) emerging as particularly notable due to their incorporation of eutectic structures comprising soft and hard phases. This study investigated the influence of shear strain on the microstructural refinement and mechanical properties of AlCoCrFeNi2.1 EHEAs, which were subjected to high-pressure torsion (HPT) at room temperature under a pressure of 6 GPa across 0.5 to 3 turns, compared to the initial material. After HPT treatment, significant grain refinement occurred due to strong shear strain, evidenced by the absence of B2 phase peaks in X-ray diffraction (XRD) analysis. Microhardness increased substantially post-HPT, reaching a saturation point at approximately 575 HV after three turns, significantly higher than that of the original sample. Moreover, the ultimate tensile strength of HPT-treated specimens reached around 1900 MPa after three revolutions, compared to approximately 1100 MPa for the as-cast alloy, with a mixed fracture mode maintained. This investigation underscores the efficacy of HPT in enhancing the mechanical properties of AlCoCrFeNi2.1 EHEAs through microstructural refinement induced by shear deformation, offering insights into the design and optimization of advanced HEAs for various engineering applications.

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