4.6 Article

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

期刊

MATERIALS LETTERS
卷 315, 期 -, 页码 -

出版社

ELSEVIER
DOI: 10.1016/j.matlet.2022.131933

关键词

Eutectic; Rolling; Microstructure; Deformation and fracture

资金

  1. Beijing Institute of Technology Research Fund Program for Young Scholars

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The feasibility of thermomechanical processing for large-size AlCoCrFeNi2.1 eutectic high-entropy alloy has been evaluated. It is found that hot-rolling can achieve outstanding tensile properties comparable to cold-rolling, while cold-rolling and warm-rolling are not effective in deforming large-size AlCoCrFeNi2.1.
Improving the strength and ductility of small-size AlCoCrFeNi2.1 eutectic high-entropy alloy by thermomechanical processing has been successfully achieved; whereas, its feasibility for large-size AlCoCrFeNi2.1 has not been evaluated yet. The current study demonstrates that both cold-rolling and warm-rolling cannot severely deform large-size AlCoCrFeNi2.1 probably due to large intrinsic deformation resistance and increased casting defects. Instead, hot-rolling successfully deforms large-size AlCoCrFeNi2.1 and achieves outstanding tensile properties comparable to the cold-rolling. This finding paves the way for engineering application of AlCoCrFeNi2.1.

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