Microstructure, strength and irradiation response of an ultra-fine grained FeNiCoCr multi-principal element alloy

JOURNAL OF ALLOYS AND COMPOUNDS

卷:851

Article

Duan, Jiaqi^1,2  He, Li^3,4  Fu, Zhiqiang⁵  Hoffman, Andrew⁶  Sridharan, Kumar^3,4  Wen, Haiming^1,6 

[1] Missouri Univ Sci & Technol, Dept Mat Sci & Engn, Rolla, MO 65409 USA

[2] Univ Warwick, Warwick Mfg Grp, Coventry CV4 7AL, W Midlands, England

[3] Univ Wisconsin, Dept Engn Phys, Madison, WI 53706 USA

[4] Univ Wisconsin, Dept Mat Sci & Engn, Madison, WI 53706 USA

[5] South China Univ Technol, Guangdong Key Lab Adv Met Mat Proc, Guangzhou 510640, Guangdong, Peoples R China

[6] Missouri Univ Sci & Technol, Dept Min & Nucl Engn, Rolla, MO 65409 USA

关键词: Multi-principal element alloy;    Irradiation damage;    Strength;    Microstructure;   

DOI  :  10.1016/j.jallcom.2020.156796

来源: Elsevier

【 摘 要 】

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 degrees 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. (C) 2020 Elsevier B.V. All rights reserved.

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