scholarly journals Corrosion behavior of CoxCrCuFeMnNi high-entropy alloys prepared by hot pressing sintered in 3.5% NaCl solution

2019 ◽  
Vol 15 ◽  
pp. 102667 ◽  
Author(s):  
Rui-Feng Zhao ◽  
Bo Ren ◽  
Bin Cai ◽  
Zhong-Xia Liu ◽  
Guo-Peng Zhang ◽  
...  
Keyword(s):  
Corrosion Behavior ◽  
Hot Pressing ◽  
High Entropy Alloys ◽  
Nacl Solution ◽  
High Entropy

Understanding the Effect of Tungsten on Corrosion Behavior of AlCuCrFeMnWx High-Entropy Alloys in 3.5 wt.% NaCl Solution

2018 ◽  
Vol 27 (9) ◽  
pp. 4481-4488 ◽  
Author(s):  
Devesh Kumar ◽  
Ornov Maulik ◽  
V. K. Sharma ◽  
Y. V. S. S. Prasad ◽  
Vinod Kumar
Keyword(s):  
Corrosion Behavior ◽  
High Entropy Alloys ◽  
Nacl Solution ◽  
High Entropy

Effect of Al on Corrosion Behavior in 3.5%NaCl Solution of AlxCoCrFeNi High Entropy Alloys

2021 ◽  
Vol 53 ◽  
pp. 20-30
Author(s):  
Victor Geantă ◽  
Ionelia Voiculescu ◽  
Mihai Cosmin Cotrut ◽  
Maria Diana Vrânceanu ◽  
Ion Mihai Vasile ◽  
...  
Keyword(s):  
Corrosion Resistance ◽  
Corrosion Behavior ◽  
Polarization Resistance ◽  
Metallic Matrix ◽  
Corrosion Current ◽  
Metal Corrosion ◽  
High Entropy Alloys ◽  
Nacl Solution ◽  
High Entropy ◽  
Arc Melting

The high entropy alloys have attracted the interest of material scientists due to theirspecial mechanical properties and a very good corrosion behavior. The corrosion resistance is provided by the formation of a passive, thin and compact oxide film that prevents the chemical dissolution of the metallic matrix. The effect of aluminum in AlxCrFeCoNi high entropy alloys (with x = 1; 1.5 and 2) that were obtained by electric arc melting under argon atmosphere has been studied in the paper. In order to understand the processes involved in metal corrosion, the alloys have been tested by polarization resistance method in 3.5% NaCl solution and main corrosion parameters have been analyzed (i.e. corrosion potential; corrosion current density; corrosion rate and polarization resistance). The surfaces of the corroded samples were examined by scanning electron microscopy to estimate the effect of the chemical composition on corrosion resistance. The corrosion tests have shown that the corrosion resistance of the HEA decreases by increasing the aluminum content from about 15 at.% to 32 at. % Al and reducing the chromium content from 28 at. % to 18 at.% Cr.

Effect of Mo and aging temperature on corrosion behavior of (CoCrFeNi)100-Mo high-entropy alloys

2020 ◽  
Vol 812 ◽  
pp. 152139 ◽  
Author(s):  
Wenrui Wang ◽  
Jieqian Wang ◽  
Zhihui Sun ◽  
Jiangtao Li ◽  
Laifeng Li ◽  
...  
Keyword(s):  
Corrosion Behavior ◽  
Aging Temperature ◽  
High Entropy Alloys ◽  
High Entropy

scholarly journals Effect of Molybdenum Additives on Corrosion Behavior of (CoCrFeNi)100−xMox High-Entropy Alloys

Entropy ◽  
2018 ◽  
Vol 20 (12) ◽  
pp. 908 ◽  
Author(s):  
Wenrui Wang ◽  
Jieqian Wang ◽  
Honggang Yi ◽  
Wu Qi ◽  
Qing Peng
Keyword(s):  
Corrosion Behavior ◽  
Compressive Strain ◽  
Compressive Yield Strength ◽  
High Entropy Alloys ◽  
Face Centered Cubic ◽  
Σ Phase ◽  
High Entropy ◽  
Passivation Film ◽  
Face Centered ◽  
Mo Content

The present work investigates the influence of micro-alloyed Mo on the corrosion behavior of (CoCrFeNi)100−xMox high-entropy alloys. All of the (CoCrFeNi)100−xMox alloys exhibit a single face-centered cubic (FCC) solid solution. However, the (CoCrFeNi)97Mo3 alloy exhibits an ordered sigma (σ) phase enriched in Cr and Mo. With the increase of x (the Mo content) from 1 to 3, the hardness of the (CoCrFeNi)100−xMox alloys increases from 124.8 to 133.6 Vickers hardness (HV), and the compressive yield strength increases from 113.6 MPa to 141.1 MPa, without fracture under about a 60% compressive strain. The potentiodynamic polarization curve in a 3.5% NaCl solution indicates that the addition of Mo has a beneficial effect on the corrosion resistance to some certain extent, opposed to the σ phase. Furthermore, the alloys tend to form a passivation film in the 0.5 M H2SO4 solution in order to inhibit the progress of the corrosion reaction as the Mo content increases.

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