Effect of Carbon Addition on Mechanical and Corrosion Properties of CoCrFeNiMn High-Entropy Alloy

作者：Huiling Zhou, Hongqun Liu, J. Li, Chengtao Li, Haokun Yang, Yanxin Qiao · 发表于：Metals · 年份：2025 · DOI：10.3390/met16010050 · 被引用次数：6 · 研究领域：High Entropy Alloys Studies、Hydrogen embrittlement and corrosion behaviors in metals、Magnesium Alloys: Properties and Applications

The CoCrFeNiMn High-Entropy Alloy (HEA) with 0, 0.5 and 1.0 at.% Carbon (C) addition has been evaluated by mechanical and corrosion testing, including tensile, wear and corrosion resistance testings. The result shows that the medium of 0.5 at.% C addition into HEA brings higher tensile toughness with 27,213.6 MPa%, less wear damage (0.37 mm3) and superior thermodynamic stability (0.73 VSCE), compared with that of the other two compositions. The tensile fracture observation points out that the high C addition embrittles the HEA with poorer toughness and wear resistance with content increasing to 1.0 at.%. The HEA material with 0.5 at.% C addition has high corrosion potential and the lowest corrosion current density, indicating that the appropriate C-alloying plays a significant role in determining the corrosion properties of HEA. The current study shall provide meaningful instruction for high-performance C-alloyed HEA development.