Oxidation behaviors and mechanical properties of L12-strengthened high-entropy alloys at 700 ℃

Shaofei Liu; Wu Kai; Jinxiong Hou; Yilu Zhao; Qian Li; Chin-hua Yang; Tao Yang; Ji-jung Kai

doi:10.1016/j.corsci.2022.110499

Author(s)

Wu Kai
Jinxiong Hou
Qian Li
Chin-hua Yang

Related Research Unit(s)

Detail(s)

Original language	English
Article number	110499
Journal / Publication	Corrosion Science
Volume	206
Online published	16 Jul 2022
Publication status	Published - Sept 2022

Link(s)

DOI	DOI https://doi.org/10.1016/j.corsci.2022.110499 Final Published version
	Check@CityULib
Link to Scopus	https://www.scopus.com/record/display.uri?eid=2-s2.0-85134969194&origin=recordpage
Permanent Link	https://scholars.cityu.edu.hk/en/publications/publication(a26415e6-b446-4621-a176-5e351b1f381f).html

Abstract

Oxidation behavior and mechanical properties of two L1₂-strengthened high-entropy superalloys (HESAs), i.e., (Ni₂Co₂FeCr)₉₂Ti₄Al₄ and (Ni₂Co₂FeCr)₉₂Nb₄Al₄, were systematically investigated at 700 ℃. Our results reveal that the oxidation resistance was significantly improved by the replacement of Ti with Nb with slightly optimized mechanical performance. The substitution of Ti by Nb promotes the formation of continuous Cr₂O₃, AlNbO₄, and Al₂O₃ layers, and causes a remarkable improvement in oxidation resistance, thus highlighting the greater potential of Nb-bearing HESAs to function as the elevated-temperature structural materials. The underlying mechanisms for the superior mechanical properties and oxidation resistance of the Nb-bearing HESA were carefully discussed.

Research Area(s)

L1 2-strengthened high -entropy alloy, Oxidation behavior, Mechanical properties, Titanium, Niobium, HIGH-TEMPERATURE OXIDATION, DELTA-PHASE PRECIPITATION, TENSILE PROPERTIES, AIR-OXIDATION, EMBRITTLEMENT, DEFORMATION, NB

Citation Format(s)

[ RIS ] [ BibTeX ]

Oxidation behaviors and mechanical properties of L1₂-strengthened high-entropy alloys at 700 ℃. / Liu, Shaofei; Kai, Wu; Hou, Jinxiong et al.
In: Corrosion Science, Vol. 206, 110499, 09.2022.

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

Liu, S, Kai, W, Hou, J, Zhao, Y, Li, Q, Yang, C, Yang, T & Kai, J 2022, 'Oxidation behaviors and mechanical properties of L1₂-strengthened high-entropy alloys at 700 ℃', Corrosion Science, vol. 206, 110499. https://doi.org/10.1016/j.corsci.2022.110499

Liu, S., Kai, W., Hou, J., Zhao, Y., Li, Q., Yang, C., Yang, T., & Kai, J. (2022). Oxidation behaviors and mechanical properties of L1₂-strengthened high-entropy alloys at 700 ℃. Corrosion Science, 206, Article 110499. https://doi.org/10.1016/j.corsci.2022.110499

Liu S, Kai W, Hou J, Zhao Y, Li Q, Yang C et al. Oxidation behaviors and mechanical properties of L1₂-strengthened high-entropy alloys at 700 ℃. Corrosion Science. 2022 Sept;206:110499. Epub 2022 Jul 16. doi: 10.1016/j.corsci.2022.110499

Liu, Shaofei ; Kai, Wu ; Hou, Jinxiong et al. / Oxidation behaviors and mechanical properties of L1₂-strengthened high-entropy alloys at 700 ℃. In: Corrosion Science. 2022 ; Vol. 206.