High-temperature age-hardening of a novel cost-effective Fe45Ni25Cr25Mo5 high entropy alloy

Yu Yin; Zhihan Chen; Ning Mo; Damon Kent; Adhitya Riadhi Candella; Kai En Koey; Qiyang Tan; Michael Bermingham; Ming-Xing Zhang

doi:10.1016/j.msea.2020.139580

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High-temperature age-hardening of a novel cost-effective Fe45Ni25Cr25Mo5 high entropy alloy

Journal article

Peer reviewed

High-temperature age-hardening of a novel cost-effective Fe45Ni25Cr25Mo5 high entropy alloy

Yu Yin, Zhihan Chen, Ning Mo, Damon Kent, Adhitya Riadhi Candella, Kai En Koey, Qiyang Tan, Michael Bermingham and Ming-Xing Zhang

Materials Science and Engineering: A, Vol.788, pp.1-10

2020

DOI: https://doi.org/10.1016/j.msea.2020.139580

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Abstract

high entropy alloys

high-temperature aging

precipitation hardening

intermetallics

oxidation

corrosion

Considering the high potential of age-hardening in metastable non-equiatomic high-entropy alloys (HEAs), the high-temperature aging behaviour of a newly developed cost-effective Fe45Ni25Cr25Mo5 HEA with a face-cantered cubic (FCC) matrix was investigated. The alloy showed high age-hardening response at temperatures up to 900°C and the peak ageing was obtained at 900°C for 48h due to the precipitation of more monoclinic Cr5.5Mo1.5Fe6.5Ni1.5-type σ phase. Although the as-cast Fe-enriched HEA composed of FCC and σ phases possessed balanced high tensile strength and ductility compared with previously reported as-cast FCC-dominated HEAs, the peak ageing only led to substantial improvement in compression properties with compression yield strength of 543.7MPa, ultimate strength of 1098.1MPa and strain to fracture of 40%. The peak aged alloy exhibited tensile brittleness at room temperature, which was attributed to the restriction of dislocation movement by the precipitation of large needle-shaped intermetallics. Furthermore, the newly developed alloy showed high oxidation and corrosion resistance, which was superior to the 316L stainless steel and was comparable to the Inconel 625 super alloy. Thus, this HEA can be potentially used as a superalloy.

Details

Title: High-temperature age-hardening of a novel cost-effective Fe45Ni25Cr25Mo5 high entropy alloy
Authors: Yu Yin (Author) - University of Queensland
Zhihan Chen (Author)
Ning Mo (Author) - University of Queensland
Damon Kent (Author) - University of the Sunshine Coast - School of Science and Engineering
Adhitya Riadhi Candella (Author) - University of Queensland
Kai En Koey (Author) - University of Queensland
Qiyang Tan (Author) - University of Queensland
Michael Bermingham (Author) - University of Queensland
Ming-Xing Zhang (Author) - University of Queensland
Publication details: Materials Science and Engineering: A, Vol.788, pp.1-10
Publisher: Elsevier BV
Date published: 2020
DOI: 10.1016/j.msea.2020.139580
ISSN: 0921-5093; 0921-5093
Organisation Unit: School of Science and Engineering - Legacy; University of the Sunshine Coast, Queensland; School of Science, Technology and Engineering
Language: English
Record Identifier: 99451608402621
Output Type: Journal article

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Collaboration types: Domestic collaboration
Web Of Science research areas: Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering; Nanoscience & Nanotechnology