Metastability-driven room temperature strain hardening in a nitrogen added FeMnCoCrN high-entropy alloy

被引：4

作者：

Tajik, A. ^{[1
]}

Zarei-Hanzaki, A. ^{[1
]}

Lee, Gunjick ^{[2
]}

Sohn, Seok Su ^{[2
]}

Abedi, H. R. ^{[3
]}

机构：

[1] Univ Tehran, Coll Engn, Sch Met & Mat Engn, Hot Deformat & Thermomechan Proc Lab High Performa, Tehran, Iran

[2] Korea Univ, Dept Mat Sci & Engn, Seoul 02841, South Korea

[3] Iran Univ Sci & Technol IUST, Sch Met & Mat Engn, Tehran, Iran

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2024年 / 918卷

基金：

新加坡国家研究基金会;

关键词：

Interstitial high-entropy alloy; Metastability engineering; Transformation-induced plasticity; Crystallugraphic orientation; Mechanical properties; EPSILON-MARTENSITE; MECHANICAL-PROPERTIES; INTERSECTION REACTIONS; PHASE-TRANSFORMATION; DEFORMATION; MICROSTRUCTURE; STRENGTH; BEHAVIOR; ACCOMMODATION; NUCLEATION;

D O I：

10.1016/j.msea.2024.147443

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

This study deals with the strain hardening capability of a nitrogen added FeMnCoCr high-entropy alloy during room temperature tensile deformation with an emphasize on the mechanical stability of FCC phase. The heightened metastability of the FCC phase provides a proper condition for hierarchical evolution of dual-phase FCC-HCP structure which finally promotes the formation of 63 % HCP martensite. Initially favoring slip mechanisms, the texture of the FCC phase transitions to geometrically hard orientations, thereby reducing its deformation accommodation capacity. This transition prompts the involvement of the HCP phase, initially evidenced by the emergence of new FCC phase and &-twins at HCP martensite intersections. Subsequently, the formation of thickened &-twins within the primary HCP lathes further contributes to deformation accommodation, explaining the observed excellent hardening behavior in the as-cast structure.

引用

页数：12