Effects of W addition on the Corrosion Behaviors of FeCoNiCrMn High Entropy Alloy Composites in the 3.5 wt.% NaCl solution

2021 ◽  
Vol 23 ◽  
pp. 100956
Author(s):  
Ziyi Zhou ◽  
Lin Wang ◽  
Xiaohua Zhao ◽  
Jili Wu ◽  
Feng Zhang ◽  
...  
Keyword(s):  
High Entropy Alloy ◽  
Nacl Solution ◽  
High Entropy ◽  
Corrosion Behaviors

Influence of remelting and annealing treatment on corrosion resistance of AlFeNiCoCuCr high entropy alloy in 3.5% NaCl solution

2019 ◽  
Vol 775 ◽  
pp. 565-570 ◽  
Author(s):  
Xiaorong Zhang ◽  
Jing Guo ◽  
Xiaohui Zhang ◽  
Yuepeng Song ◽  
Zongxi Li ◽  
...  
Keyword(s):  
Corrosion Resistance ◽  
Annealing Treatment ◽  
High Entropy Alloy ◽  
Nacl Solution ◽  
High Entropy

Microstructure Evolution and Corrosion Behavior of Directionally Solidified FeCoNiCrCu High Entropy Alloy

2011 ◽  
Vol 66-68 ◽  
pp. 146-149 ◽  
Author(s):  
Hong Bao Cui ◽  
Li Feng Zheng ◽  
Jin Yong Wang
Keyword(s):  
Crystal Structure ◽  
Corrosion Resistance ◽  
Potentiodynamic Polarization ◽  
Solidification Rate ◽  
Diffraction Peak ◽  
High Entropy Alloy ◽  
Interface Morphology ◽  
Nacl Solution ◽  
Directionally Solidified ◽  
High Entropy

The microstructures of FeCoNiCrCu high entropy alloy were investigated under directional solidification. The results showed that only diffraction peak corresponding to a FCC crystal structure was observed in the directionally solidified FeCoNiCrCu alloy. With increasing solidification rate, the interface morphology would grows in planar, cellular and dendrite. Comparing the potentiodynamic polarization of as-cast and directionally solidified FeCoNiCrCu high entropy alloy in a 3.5%NaCl solution, it is clearly reveals that the corrosion resistance of directionally solidified FeCoNiCrCu alloy is superior to that of the as-cast FeCoNiCrCu alloy.

scholarly journals Microstructure, Mechanical and Corrosion Behaviors of CoCrFeNiAl0.3 High Entropy Alloy (HEA) Films

Coatings ◽  
2017 ◽  
Vol 7 (10) ◽  
pp. 156 ◽  
Author(s):  
Libo Gao ◽  
Weibing Liao ◽  
Hongti Zhang ◽  
James Surjadi ◽  
Dong Sun ◽  
...  
Keyword(s):  
High Entropy Alloy ◽  
High Entropy ◽  
Corrosion Behaviors

scholarly journals Investigation into Microstructure, Wear Resistance in Air and NaCl Solution of AlCrCoNiFeCTax High-Entropy Alloy Coatings Fabricated by Laser Cladding

Coatings ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 358
Author(s):  
Peng Zhao ◽  
Jun Li ◽  
Ruyan Lei ◽  
Baige Yuan ◽  
Manman Xia ◽  
...  
Keyword(s):  
Wear Resistance ◽  
Laser Cladding ◽  
High Hardness ◽  
Atomic Radius ◽  
High Entropy Alloy ◽  
Dispersion Strengthening ◽  
Nacl Solution ◽  
High Entropy ◽  
Wear Rates ◽  
Significant Difference

AlCrCoNiFeCTax (x = 0, 0.5 and 1.0) high-entropy alloys coatings were synthesized on 45# steel by laser cladding. The microstructural evolution of the coatings with the change in x was analyzed in detail. The effect of Ta content on the wear behaviors of the coatings at different circumstances (in air and 3.5 wt.% NaCl solution) was especially highlighted. The microstructure presented the following change: equiaxed BCC (Body Centered Cubic) grains + fine MC (carbide, M = Al, Cr, Co and Ni) particles (x = 0) → equiaxed BCC grains + coarse TaC blocks + fine TaC particles (x = 0.5) → flower-like BCC grains + coarse TaC blocks + eutecticum (BCC + TaC) (x = 1.0). The average microhardness of the coatings demonstrated an upward tendency with increasing x due to the combination of the stronger solid solution and dispersion strengthening from the significant difference in atomic radius between Ta and Fe and the formation of TaC with an extremely high hardness. The wear rates of the coatings were gradually reduced both in air and in NaCl solution along with the increase in Ta content, which were lower than those of the substrate. The wear rates of the coatings with x = 0.5 and 1.0 in NaCl solution were slightly reduced by about 17% and 12% when compared with those in air. However, the values of the substrate and the coating without Ta in NaCl solution were sharply enhanced by 191% and 123% when compared with those in air. This indicated that the introduction of Ta contributed to the improvement in wear resistance both in air and in NaCl solution.

scholarly journals Wear and Corrosion Resistance Analysis of FeCoNiTiAlx High-Entropy Alloy Coatings Prepared by Laser Cladding

Coatings ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 155
Author(s):  
Zhaolei Sun ◽  
Mingyuan Zhang ◽  
Gaoqi Wang ◽  
Xuefeng Yang ◽  
Shouren Wang
Keyword(s):  
Wear Resistance ◽  
Corrosion Resistance ◽  
Wear Rate ◽  
Laser Cladding ◽  
Dendritic Structure ◽  
Wear Test ◽  
Corrosion Current ◽  
High Entropy Alloy ◽  
Nacl Solution ◽  
High Entropy

FeCoNiTiAlx (x = 0, 0.5, 1) high-entropy alloy coatings were prepared by laser cladding technology. The phase, microstructure, hardness, wear resistance and corrosion resistance were tested and analyzed. The results showed Al element promoted the conversion from the FCC phase to the BCC phase. The coating presented dendritic structure due to the addition of the Al element, while the number of dendrites increased. And the average hardness of the coating increased from 204 to 623 HV. The addition of the Al element increases the corrosion current density of the coating from 1.270 × 10−5 to 3.489 × 10−5 A/cm2. The wear rate of the coatings decreases with the increase of Al content according to dry friction and wear, which indicates the wear resistance of the coating was improved by adding the Al element. According to the corrosion wear test in 3.5% NaCl solution, it can be found that the wear rate of the coating increases firstly and then decreases with the addition of the Al element, which indicates that the addition of the Al element intensifies the wear of the coating in 3.5% NaCl solution.

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