Microstructure, Strength and Irradiation Response of an Ultra-Fine Grained FeNiCoCr Multi-Principal Element Alloy

Abstract

An ultra-fine grained (UFG) FeNiCoCr multi-principal element alloy (MPEA) with uniformly distributed nanoscale Cr-rich precipitates was fabricated by mechanical alloying (MA) and spark plasma sintering (SPS). Compression tests show that the yield strength, compressive strength and failure strain of this as-fabricated FeNiCoCr alloy are 1525 MPa, 1987 MPa and 24.4%, respectively. The irradiation response of this alloy was studied following Fe2+ ion irradiation with a peak dose of 58 dpa at temperatures of 300 and 500 °C. Our study indicates that the current FeNiCoCr MPEA exhibits modest radiation induced grain boundary (GB) segregation and possesses higher resistance to defects coarsening and void formation compared to conventional Fe–Ni–Cr stainless steels.

Department(s)

Materials Science and Engineering

Research Center/Lab(s)

Intelligent Systems Center

Comments

U.S. Department of Energy, Grant DE-AC07-051Dl4517

Keywords and Phrases

Irradiation Damage; Microstructure; Multi-Principal Element Alloy; Strength

International Standard Serial Number (ISSN)

0925-8388

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2021 Elsevier, All rights reserved.

Publication Date

15 Jan 2021

Link to Full Text

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