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Extra Strengthening and Work Hardening in Novel Precipitation‐Hardened FeCrNiSi x Medium‐Entropy Alloys
Author(s) -
Bai Tianxiang,
Zhang Tuanwei,
Ma Shengguo,
Zhao Dan,
Wang Zhihua
Publication year - 2021
Publication title -
advanced engineering materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.938
H-Index - 114
eISSN - 1527-2648
pISSN - 1438-1656
DOI - 10.1002/adem.202001185
Subject(s) - materials science , precipitation hardening , intermetallic , alloy , precipitation , strengthening mechanisms of materials , ductility (earth science) , nanoscopic scale , metallurgy , work hardening , hardening (computing) , high entropy alloys , composite material , nanotechnology , microstructure , creep , physics , layer (electronics) , meteorology
Precipitation strengthening is believed as an important strengthening method that optimizes the strength of alloys. Herein, the possibility of precipitation strengthening is demonstrated by introducing the intermetallic (Cr, Si)‐rich σ phase in the novel FeCrNiSi x MEAs system. It is found that simultaneous enhancement in strength and work hardening can be attained by adding Si element in the FeCrNi MEA. Specifically, the FeCrNiSi 0.2 alloy realizes a good balance of strength and ductility due to the precipitation of ultrafine‐ or even nanoscale‐sized σ phase. Moreover, quantitative analyses are conducted to assess the underlying strengthening mechanisms.