Fabrication of Fe-based metallic glass reinforced FeCoNiCrMn high-entropy alloy through additive manufacturing: mechanical property enhancement and corrosion resistance improvement
Zhenghang Ma, Qiang Zhai, Kunlun Wang, Guoxia Chen, Xiaotian Yin, Qingxia Zhang, Lingtao Meng, Shenghai Wang, Li Wang
Abstract
In recent years, high entropy alloys (HEA) receive extensive attention for their excellent mechanical performance. In this paper, the FeCoNiCrMn high-entropy alloy reinforced material is produced by laser powder bed fusion (LPBF). The excellent tensile performance can be achieved through many strengthening mechanisms, e.g., solution strengthening, dislocation strengthening, fine-grain refinement, and dispersion strengthening. The reinforced material with additive Fe-based metallic glass shows a yield strength of 675 MPa, 29.8% higher than FeCoNiCrMn (520 MPa), and an average hardness of 241.9 HV, 12.7% higher than FeCoNiCrMn (214.6 HV). Meanwhile, the plasticity of the reinforced material is maintained at a good level. In comparison with FeCoNiCrMn, the corrosion current density is reduced by 18.9%, and the corrosion resistance is significantly improved. The high strength and corrosion resistance are achieved by the addition of Fe-based metallic glass, which provides a feasible approach for the preparation of HEA with enhanced mechanical properties in the future.