Effect of vanadium content on microstructure and properties of in situ TiC reinforced VxFeCoNiCu multi-principal-element alloy matrix composites
Chun-lei Tu1,2, Xiao-dong Sun3, Jie Li1, He-guo Zhu3, Xiang-dong Li2
1 College of Mechanical Engineering, Southeast University, Nanjing 210094, Jiangsu, China 2 Special Equipment Safety Supervision Inspection Institute of Jiangsu Province, Nanjing 210036, Jiangsu, China 3 College of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing 210094, Jiangsu, China
Effect of vanadium content on microstructure and properties of in situ TiC reinforced VxFeCoNiCu multi-principal-element alloy matrix composites
Chun-lei Tu1,2, Xiao-dong Sun3, Jie Li1, He-guo Zhu3, Xiang-dong Li2
1 College of Mechanical Engineering, Southeast University, Nanjing 210094, Jiangsu, China 2 Special Equipment Safety Supervision Inspection Institute of Jiangsu Province, Nanjing 210036, Jiangsu, China 3 College of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing 210094, Jiangsu, China
摘要 VxFeCoNiCu high entropy alloy matrix composites reinforced by in situ TiC particles (10 vol.%), i.e., VxFeCoNiCu/TiC composites, were fabricated from V–Fe–Co–Ni–Cu–Ti–C system using vacuum inductive melting method. With the content of vanadium increasing, the size of TiC particles decreased gradually. Meanwhile, vanadium agglomeration occurred slightly. The reaction mechanism of the mixed powder (Fe, V, Ti and C) and the mechanical properties of obtaining VxFeCoNiCu/TiC composites were studied. It was found that three reactions occurred (Fe-Ti-FeTi-Fe2Ti, FeTi-Fe2Ti-Fe-Ti and Ti-C-TiC) in the heating process. The apparent activation energy for these three reactions was calculated and found to be 26.4, 698.3 and 1879.0 kJ/mol, respectively. At room temperature, tensile strength and elongation increased first and then decreased with the increase in vanadium content and the microhardness increased gradually. The maximum tensile strength of the composites was determined to be 666 MPa, representing a 17.7% increase over that of FeCoNiCu/TiC high entropy alloy composites.
Abstract：VxFeCoNiCu high entropy alloy matrix composites reinforced by in situ TiC particles (10 vol.%), i.e., VxFeCoNiCu/TiC composites, were fabricated from V–Fe–Co–Ni–Cu–Ti–C system using vacuum inductive melting method. With the content of vanadium increasing, the size of TiC particles decreased gradually. Meanwhile, vanadium agglomeration occurred slightly. The reaction mechanism of the mixed powder (Fe, V, Ti and C) and the mechanical properties of obtaining VxFeCoNiCu/TiC composites were studied. It was found that three reactions occurred (Fe-Ti-FeTi-Fe2Ti, FeTi-Fe2Ti-Fe-Ti and Ti-C-TiC) in the heating process. The apparent activation energy for these three reactions was calculated and found to be 26.4, 698.3 and 1879.0 kJ/mol, respectively. At room temperature, tensile strength and elongation increased first and then decreased with the increase in vanadium content and the microhardness increased gradually. The maximum tensile strength of the composites was determined to be 666 MPa, representing a 17.7% increase over that of FeCoNiCu/TiC high entropy alloy composites.
Chun-lei Tu,Xiao-dong Sun,Jie Li, et al. Effect of vanadium content on microstructure and properties of in situ TiC reinforced VxFeCoNiCu multi-principal-element alloy matrix composites[J]. Journal of Iron and Steel Research International, 2021, 28(11): 1471-1480.
2021, Vol. 28 
