Annealing effect for the Al0.3CoCrFeNi high-entropy alloy fibers

doi:10.1016/j.jallcom.2018.11.116

This content will become publicly available on November 12, 2019

Title: Annealing effect for the Al _0.3CoCrFeNi high-entropy alloy fibers

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Abstract

High-entropy alloy fibers with excellent performance potential are desired for functional applications. A previous study on the Al _0.3CoCrFeNi high-entropy fiber reported a tensile fracture strength of 1200 MPa and elongation of 8% at room temperature (Acta Mater. 123 (2017) 285). Here, the goal is to improve the ductility of Al _0.3CoCrFeNi high-entropy fiber by manipulating the microstructure through annealing. Al _0.3CoCrFeNi fibers at Φ1.0 mm and Φ1.6 mm diameters were annealed at 900 °C for 10 min, 30 min, 300 min and 720 min, respectively. The resulting microstructure is a fine face-centered cubic (FCC) structure with grain sizes less than ~3 μm, which were strengthened by dense NiAl-type ordered body-centered cubic (B2) precipitation. Finally, the fibers achieved a fracture strength greater than 900 MPa with an elongation of over 25% at room temperature.

Authors:

Li, Dongyue ^[1];

^[2]; Hawk, Jeffrey A. ^[3];

^[1]

Univ. of Science and Technology, Beijing (China)
National Energy Technology Lab. (NETL), Albany, OR (United States); AECOM, South Park, PA (United States)
National Energy Technology Lab. (NETL), Albany, OR (United States)

Publication Date:: 2018-11-12

Research Org.:: National Energy Technology Laboratory (NETL), Pittsburgh, PA, Morgantown, WV, and Albany, OR (United States)

Sponsoring Org.:: USDOE Office of Fossil Energy (FE)

OSTI Identifier:: 1532661

Grant/Contract Number:: FE0004000

Resource Type:: Accepted Manuscript

Journal Name:: Journal of Alloys and Compounds

Additional Journal Information:: Journal Volume: 778; Journal Issue: C; Journal ID: ISSN 0925-8388

Publisher:: Elsevier

Country of Publication:: United States

Language:: English

Subject:: 36 MATERIALS SCIENCE; High entropy alloy fibers; Grain growth; Precipitation; Strength-ductility

Citation Formats


                    Li, Dongyue, Gao, Michael C., Hawk, Jeffrey A., and Zhang, Yong. Annealing effect for the Al0.3CoCrFeNi high-entropy alloy fibers.  United States: N. p., 2018. 
        Web.  doi:10.1016/j.jallcom.2018.11.116.

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                    Li, Dongyue, Gao, Michael C., Hawk, Jeffrey A., & Zhang, Yong. Annealing effect for the Al0.3CoCrFeNi high-entropy alloy fibers.  United States.  doi:10.1016/j.jallcom.2018.11.116.

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                    Li, Dongyue, Gao, Michael C., Hawk, Jeffrey A., and Zhang, Yong. Mon .  
        "Annealing effect for the Al0.3CoCrFeNi high-entropy alloy fibers".  United States.  doi:10.1016/j.jallcom.2018.11.116.  https://www.osti.gov/servlets/purl/1532661.

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@article{osti_1532661,

  title        = {Annealing effect for the Al0.3CoCrFeNi high-entropy alloy fibers},

  author       = {Li, Dongyue and Gao, Michael C. and Hawk, Jeffrey A. and Zhang, Yong},

  abstractNote = {High-entropy alloy fibers with excellent performance potential are desired for functional applications. A previous study on the Al0.3CoCrFeNi high-entropy fiber reported a tensile fracture strength of 1200 MPa and elongation of 8% at room temperature (Acta Mater. 123 (2017) 285). Here, the goal is to improve the ductility of Al0.3CoCrFeNi high-entropy fiber by manipulating the microstructure through annealing. Al0.3CoCrFeNi fibers at Φ1.0 mm and Φ1.6 mm diameters were annealed at 900 °C for 10 min, 30 min, 300 min and 720 min, respectively. The resulting microstructure is a fine face-centered cubic (FCC) structure with grain sizes less than ~3 μm, which were strengthened by dense NiAl-type ordered body-centered cubic (B2) precipitation. Finally, the fibers achieved a fracture strength greater than 900 MPa with an elongation of over 25% at room temperature.},

  doi          = {10.1016/j.jallcom.2018.11.116},

  journal      = {Journal of Alloys and Compounds},

  number       = C,

  volume       = 778,

  place        = {United States},

  year         = {2018},

  month        = {11}

}

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DOI: 10.1016/j.jallcom.2018.11.116

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This content will become publicly available on November 12, 2019

Title: Annealing effect for the Al 0.3CoCrFeNi high-entropy alloy fibers

Abstract

Citation Formats

Title: Annealing effect for the Al _0.3CoCrFeNi high-entropy alloy fibers