Effect of V Content on Phase Formation and Mechanical Properties of the CoFeNiMnVx High-Entropy Alloys

Zhu, Min; Zhang, Mao; Yao, Lixiu; Jie, Ziqi; Liu, Yongqin; Li, Kun; Jian, Zengyun

doi:10.1007/s11665-021-06428-2

Cited by 6 publications

(1 citation statement)

References 30 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The FCC phase CoFeNiMn HEAs have excellent ductility, and the addition of adjacent elements V and Cr can promote the strength enhancement of CoFeNiMn‐based HEAs. [ 35 ] However, the addition of Cr did not significantly improve the strength of the HEAs. Due to the poor compatibility of V with other elements, precipitates from in the solid solution of the alloy, thereby promoting a significant improvement in the strength of the alloy.…”

Section: Introductionmentioning

confidence: 99%

Effects of Cold Rolling and Annealing Treatment on Microstructure and Properties of CoFeNiMnV High‐Entropy Alloys

et al. 2022

View full text Add to dashboard Cite

Herein, a combination of cold rolling (CR) and annealing treatment is used to investigate the evolution of the microstructure and mechanical properties of CoFeNiMnV high-entropy alloys (HEAs) fabricated by powder plasma arc additive manufacturing (PPA-AM). The deposited CoFeNiMnV HEAs exhibit a face-centered cubic (FCC) structure with a small amount of σ phase precipitation. After 50% CR, the microstructure of CoFeNiMnV HEAs is severely deformed along the rolling direction, and the grain size is obviously refined. Therefore, the hardness and strength of the alloy are significantly improved. The rolled CoFeNiMnV HEAs are annealed at 500, 700 and 900 °C, for 60 min. The results show that annealing at 500 °C has little effect on the microstructure and dislocation density of the alloy, and the alloy still maintains high strength and hardness. With increasing of annealing temperature to 700 and 900 °C, the dislocation density of the CoFeNiMnV HEAs is significantly reduced. Meanwhile the σ phase is gradually dissolved, and the recrystallized grains and annealing twins are significantly coarsened. The analysis suggests that it decreases the strength of the CoFeNiMnV HEAs, but increases the elongation. CoFeNiMnV HEAs annealed at 700 °C for 60 min after CR exhibit an excellent high strength-toughness combination.

show abstract

Section: Introductionmentioning

confidence: 99%