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

Journal Article · · Journal of Alloys and Compounds
 [1]; ORCiD logo [2];  [3]; ORCiD logo [1]
  1. Univ. of Science and Technology, Beijing (China)
  2. National Energy Technology Lab. (NETL), Albany, OR (United States); AECOM, South Park, PA (United States)
  3. National Energy Technology Lab. (NETL), Albany, OR (United States)

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.

Research Organization:
National Energy Technology Laboratory (NETL), Pittsburgh, PA, Morgantown, WV, and Albany, OR (United States)
Sponsoring Organization:
USDOE Office of Fossil Energy (FE); USDOE
Grant/Contract Number:
FE0004000
OSTI ID:
1532661
Alternate ID(s):
OSTI ID: 1636587
Journal Information:
Journal of Alloys and Compounds, Vol. 778, Issue C; ISSN 0925-8388
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English

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