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Effects of Fe Content on Microstructures and Properties of AlCoCrFe x Ni High-Entropy Alloys

  • Research Article - Mechanical Engineering
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Abstract

The influences of added Fe element on the microstructures and properties of AlCoCrFe x Ni high-entropy alloys (x denoted the atomic fraction of Fe element at 0.2, 0.4, 0.6, 0.8, 1.2, 1.4, 1.6, 1.8, and 2.0) were investigated. When x = 0.2, the alloy exhibited dendrites morphology, but as the Fe content increased, the AlCoCrFe x Ni HEAs transformed to equiaxed grains morphology. Inside the equiaxed grains and dendritic grains, spinoidal decomposition microstructure could be clearly observed. The microstructures changed from Cr3Ni2 + B2 + BCC structures to B2 + BCC mixed structures as x exceeded 0.6, the hardness declined from HV637.2 to HV460.2, and the compressive fracture strength showed a slight decrease, whereas the plastic property showed a distinct improvement with the addition of Fe element. The maximum compression strength was 2335MPa when x = 0.2, and the maximum compression ratio was 36% when x = 2.0. The alloys transformed from paramagnetic to ferromagnetic as the content of Fe element increased, and all of the alloys exhibited soft magnetic behaviors.

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Authors and Affiliations

  1. School of Materials Science and Engineering, Dalian University of Technology, Dalian, 116024, China

    Qiushi Chen, Kaiyao Zhou, Li Jiang, Yiping Lu & Tingju Li

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  1. Qiushi Chen
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  2. Kaiyao Zhou
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  3. Li Jiang
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  4. Yiping Lu
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  5. Tingju Li
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Correspondence to Yiping Lu.

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Chen, Q., Zhou, K., Jiang, L. et al. Effects of Fe Content on Microstructures and Properties of AlCoCrFe x Ni High-Entropy Alloys. Arab J Sci Eng 40, 3657–3663 (2015). https://doi.org/10.1007/s13369-015-1784-9

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  • DOI: https://doi.org/10.1007/s13369-015-1784-9

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