Influence of multiphase evolution on corrosion resistance of AlxCoCrFeNi alloys determined by transmission electron microscopy
Source abstract
Abstract
The atomic structural evolution of the precipitated phase and the metastable pitting corrosion behavior of Al xCoCrFeNi alloys were investigated. With the increase of Al content, the (Cr, Fe)-rich phase in Al x CoCrFeNi alloys changed from FCC (A1 phase) to BCC (A2 phase) structure, and their shapes changed from strip to sphere, but the increase of the (Al, Ni)-rich phase (B2 phase) deteriorated their corrosion resistance. Al 0.25CoCrFeNi alloy is single phase FCC structure, while Al 0.75CoCrFeNi alloy is FCC + B2 structure, and Al 1.0CoCrFeNi and Al 1.5CoCrFeNi alloy are A2 + B2 structures. The Al 1.5 CoCrFeNi alloy had the worst corrosion resistance with the weak potential difference between the precipitated phases. Although the element segregation (nano-B2 phase) and the large potential difference at the interphase boundary were regarded as a factor of galvanic corrosion, the passive film played a key role in the corrosion resistance of Al xCoCrFeNi alloys.
Source: expertdata · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: High-Temperature Coating Behaviors · Corrosion Behavior and Inhibition · Hydrogen embrittlement and corrosion behaviors in metals
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (39)
Show source-provided references
1. High-entropy alloys: a critical review10.1080/21663831.2014.912690 ↗
2. Microstructures and properties of high-entropy alloys10.1016/j.pmatsci.2013.10.001 ↗
3. High entropy alloys as a bold step forward in alloy development10.1038/s41467-019-09700-1 ↗
4. Science and technology in high-entropy alloys10.1007/s40843-017-9195-8 ↗
5. High-entropy alloys10.1038/s41578-019-0121-4 ↗
6. Outstanding radiation resistance of tungsten-based high-entropy alloys10.1126/sciadv.aav2002 ↗
7. Microstructural origins of high strength and high ductility in an AlCoCrFeNi2. 1 eutectic high-entropy alloy10.1016/j.actamat.2017.07.041 ↗
8. Designing solid solution hardening to retain uniform ductility while quadrupling yield strength10.1016/j.actamat.2019.08.024 ↗
9. High impact toughness of CrCoNi medium-entropy alloy at liquid-helium temperature10.1016/j.scriptamat.2019.07.010 ↗
10. Nanoscale origins of the damage tolerance of the high-entropy alloy CrMnFeCoNi10.1038/ncomms10143 ↗
11. Ultrastrong ductile and stable high-entropy alloys at small scales10.1038/ncomms8748 ↗
12. Alloying, thermal stability and strengthening in spark plasma sintered AlxCoCrCuFeNi high entropy alloys10.1016/j.jallcom.2013.08.176 ↗
13. Microstructure and electrochemical properties of high entropy alloys-a comparison with type-304 stainless steel10.1016/j.corsci.2004.11.008 ↗
14. Microstructure and properties of Al0.3CrFe1.5MnNi0.5Tix and Al0.3CrFe1.5MnNi0.5Six high-entropy alloys10.1007/s12598-014-0224-4 ↗
15. Microstructure and properties of Al2CrFeCoCuTiNix high-entropy alloys prepared by laser cladding10.1016/j.jallcom.2012.11.100 ↗
16. Corrosion behavior of FeCoNiCrCux high-entropy alloys in 3.5% sodium chloride solution10.1016/j.matchemphys.2005.01.001 ↗
17. Corrosion of high entropy alloys10.1038/s41529-017-0009-y ↗
18. Evaluation of microstructure and mechanical property variations in AlxCoCrFeNi high entropy alloys produced by a high-throughput laser deposition method10.1016/j.intermet.2018.01.021 ↗
19. Phases, microstructure and mechanical properties of AlxCoCrFeNi high-entropy alloys at elevated temperatures10.1016/j.jallcom.2013.11.084 ↗
20. In-situ electrochemical-AFM study of localized corrosion of AlxCoCrFeNi high-entropy alloys in chloride solution10.1016/j.apsusc.2018.01.047 ↗
21. Corrosion of AlxCoCrFeNi high-entropy alloys: Al-content and potential scan-rate dependent pitting behavior10.1016/j.corsci.2017.02.019 ↗
22. Structure and properties of FeCoNiCrCu0.5Alx high-entropy alloy10.1016/S1003-6326(13)62523-6 ↗
23. Jenko, Electrochemical and XPS studies of the passive film formed on stainless steels in borate buffer and chloride solutions10.1016/j.corsci.2006.11.001 ↗
24. Homogenization of AlxCoCrFeNi high-entropy alloys with improved corrosion resistance10.1016/j.corsci.2018.01.030 ↗
25. Reflections on the history of electrochemical impedance spectroscopy10.1016/j.electacta.2005.02.107 ↗
26. Understanding effect of 3.5 wt% NaCl on the corrosion of Al0.1CoCrFeNi high-entropy alloy10.1016/j.jnucmat.2017.08.015 ↗
27. Corrosion resistance of weight reduced AlxCrFeMoV high entropy alloys10.1016/j.apsusc.2019.03.173 ↗
28. Corrosion mechanisms of steel concrete moulds in contact with a demoulding agent studied by EIS and XPS10.1016/S0010-938X(03)00076-3 ↗
29. XPS and STM investigation of the passive film formed on Cr (110) single-crystal surfaces10.1149/1.2059274 ↗
30. Investigating the effect of Cu-rich phase on the corrosion behavior of Super 304H austenitic stainless steel by TEM10.1016/j.corsci.2017.11.001 ↗
31. Effect of polishing process on corrosion behavior of 308L stainless steel in high temperature water10.1016/j.apsusc.2017.12.190 ↗
32. Application of a Kelvin microprobe to the corrosion of metals in humid atmospheres10.1149/1.2085578 ↗
33. Depletion effects at phase boundaries in 2205 duplex stainless steel characterized with SKPFM and TEM/EDS10.1016/j.corsci.2009.05.012 ↗
34. Composition changes around sulphide inclusions in stainless steels, and implications for the initiation of pitting corrosion10.1016/j.corsci.2010.07.021 ↗
35. Effect of isothermal aging on the pitting corrosion resistance of UNS S82441 duplex stainless steel based on electrochemical detection10.1016/j.corsci.2015.01.014 ↗
36. Corrosion mechanism of an equimolar AlCoCrFeNi high-entropy alloy additively manufactured by electron beam melting10.1038/s41529-020-00127-4 ↗
37. Microstructure and Electrochemical Performances of AlxFeCoNiCr(B) High Entropy Alloys, in: Materials Science Forum
38. Nature of passive films on iron-chromium alloys10.1016/0013-4686(72)80079-3 ↗
39. Element-resolved corrosion analysis of stainless-type glass-forming steels10.1126/science.1230081 ↗