Substructure development, martensitic transformation and rapid work-hardening in an as-cast interstitial substituted N atom in FeMnCoCr high-entropy alloy

被引：21
作者：
Tajik, A. [1 ]
Zarei-Hanzaki, A. [1 ]
Abedi, H. R. [2 ]
Moshiri, A. [1 ]
Lee, Gunjick [3 ]
Sohn, Seok Su [3 ]
机构：
[1] Univ Tehran, Coll Engn, Sch Met & Mat Engn, Hot Deformat & Thermomechan Proc Lab High Performa, Tehran, Iran
[2] Iran Univ Sci & Technol IUST, Sch Met & Mat Engn, Tehran, Iran
[3] Korea Univ, Dept Mat Sci & Engn, Seoul 02841, South Korea
来源：
JOURNAL OF ALLOYS AND COMPOUNDS | 2023年 / 960卷
基金：
新加坡国家研究基金会;
关键词：
High-entropy alloy; Strain hardening; Transformation-induced plasticity; Substructure development; Mechanical properties; Twinning; STACKING-FAULT ENERGY; STRENGTHENING MECHANISMS; ORIENTATION DEPENDENCE; PHASE-STABILITY; SINGLE-PHASE; MICROSTRUCTURE; DEFORMATION; NITROGEN; BEHAVIOR; DESIGN;
D O I：
10.1016/j.jallcom.2023.170705
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The microstructural evolution and room-temperature mechanical properties of nitrogen-added Fe50Mn30Co10Cr10 as-cast high-entropy alloy were investigated. Interestingly, an excellent strength-ductility trade-off with a rapid hardening stage was achieved in the as-cast structure (tensile strength: 740 MPa, ductility: 42 %) that was comparable with those counterparts holding wrought structure. These excellent mechanical properties were attributed to the capability of metastable FCC microstructure en-abling deformation-induced martensitic transformation even at low imposed strain at room temperature. Simultaneously, the occurrence of substructure development independent of martensitic transformation, significantly contribute to increase the capability of the material for strain accommodation.& COPY; 2023 Elsevier B.V. All rights reserved.
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页数：10
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