Enhanced localized corrosion resistance of Ni-based alloy 625 processed by directed energy deposition additive manufacturing
Source abstract
Abstract
We report a significant improvement in localized corrosion resistance of Ni-based alloy 625 processed by directed energy deposition (DED) in 7.6 mol/L LiCl at 50 oC. Disparities observed in polarization behavior between DED and wrought alloy 625 are analyzed through compositional and microstructural differences. The exceptional localized corrosion resistance of the DED alloy likely stems from the refinement of secondary phases resultant from the DED process. The prototypical precipitates larger than ≈1 μm in the wrought material, primarily Nb,Ti-enriched face centered cubic nitrides with the stoichiometry of MN where M = Nb, Ti, Cr, served as pit initiation sites and likely degraded the corrosion resistance.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Additive Manufacturing Materials and Processes · Metal and Thin Film Mechanics · High Entropy Alloys Studies
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (32)
Show source-provided references
1. The invention and definition of alloy 625
2. Effect of environmental variables on crevice corrosion susceptibility of Ni–Cr–Mo alloys for nuclear repositories10.1016/j.mspro.2015.04.043 ↗
3. Effect of temperature on the crevice corrosion of nickel alloys containing chromium and molybdenum10.1149/2.0431503jes ↗
4. Crevice corrosion stabilization and repassivation behavior of alloy 625 and alloy 2210.5006/1.3281677 ↗
5. Localized corrosion characteristics of nickel alloys: a review10.1007/s40195-017-0553-z ↗
6. G. Cragnolino, D. Dunn, N. Sridhar, Repassivation potential for localized corrosion of Alloys 625 and C22 in simulated repository environments, in: Corrosion 98, NACE International, Houston, TX, 1998.
7. Interstitial elements created via metal 3D printing10.1016/j.mattod.2023.04.020 ↗
8. The role of microstructure and surface finish on the corrosion of selective laser melted 304L10.1149/2.0431805jes ↗
9. On the enhanced corrosion resistance of a selective laser melted austenitic stainless steel10.1016/j.scriptamat.2017.07.037 ↗
10. On the corrosion and metastable pitting characteristics of 316L stainless steel produced by selective laser melting10.1149/2.0551706jes ↗
11. On the pitting behaviour of laser powder bed fusion prepared 316L stainless steel upon post-processing heat treatments10.1016/j.corsci.2021.110060 ↗
12. Evaluation of corrosion resistance of alloy 625 obtained by laser powder bed fusion10.1149/2.0471911jes ↗
13. Study on corrosion properties of additive manufactured 316L stainless steel and alloy 625 in seawater
14. Characterization of corrosion behavior on additively manufactured alloys
15. Corrosion of additively manufactured stainless steels—process, structure, performance: a review10.5006/3741 ↗
16. Impact of iron composition on the properties of an additively manufactured solid solution strengthened nickel base alloy10.1016/j.msea.2018.01.112 ↗
17. Stable nitride precipitation in additively manufactured nickel superalloys10.1016/j.jallcom.2022.164918 ↗
18. Impact of chemical composition on precipitate morphology in an additively manufactured nickel base superalloy10.1016/j.jallcom.2019.05.230 ↗
19. W. Rasband, ImageJ, U.S. National Institutes of Health, Bethesda, Maryland, USA, in, 2011.
20. A general model for the repassivation potential as a function of multiple aqueous solution species10.1016/j.corsci.2003.10.002 ↗
21. Model for corrosion of carbon steel in lithium bromide absorption refrigeration systems10.5006/1.3280559 ↗
22. Considerations of the stability of pit repassivation during pitting corrosion of passive metals10.1149/1.2115744 ↗
23. Thermo-Calc & DICTRA, computational tools for materials science10.1016/S0364-5916(02)00037-8 ↗
24. Interstitial elements created via metal 3D printing10.1016/j.mattod.2023.04.020 ↗
25. Investigation of oxide inclusions and primary carbonitrides in inconel 718 superalloy refined through electroslag remelting process10.1007/s11663-012-9723-6 ↗
26. Crevice corrosion of alloy 625 in natural seawater10.5006/1.3277580 ↗
27. Localised corrosion of heat-treated alloys Part II – predicting grain boundary microchemistry and its effect on repassivation potential10.1179/174327809X409240 ↗
28. Microstructural and corrosion aspects of alloy 69010.1179/000705999101500851 ↗
29. E.L. Hibner, Evaluation of Test Procedures for Critical Crevice Temperature Determination for Nickel Alloys in a Ferric Chloride Environment, in: Corrosion 86, Houston, TX, 1986.10.5006/C1986-86181 ↗
30. The initiation of pitting corrosion on austenitic stainless steel: on the role and importance of sulphide inclusions10.1016/0010-938X(92)90074-D ↗
31. Investigating the influence of Cr and Mo additions to commercial ni-based alloys exposed to neutral and acidic chloride solutions10.1149/1945-7111/abbea7 ↗
32. Heat treatment for metal additive manufacturing10.1016/j.pmatsci.2022.101051 ↗