On the impact of Cr and Ag additions on the grain boundary microchemistry, hydrogen permeability and environmentally assisted cracking mechanism of an Al-Zn-Mg-Cu-Zr 7xxx alloy
Source abstract
Abstract
This study explored the impact of minor Cr and Ag additions on the resistance of a new generation Al-8Zn-2Mg-2Cu-0.1Zr alloy to hydrogen environmentally assisted cracking (HEAC) in humid air . The results show that HEAC in Al-8Zn-2Mg-2Cu-0.1Zr alloy can be suppressed by 0.1 wt% Cr addition, due to the formation of E-Al 18 Mg 3 Cr 2 dispersoids with a high H binding energy and possibly a less electrochemically active grain boundary (GB) microchemistry. ∼ 0.3 wt% Ag addition in Al-8Zn-2Mg-2Cu-0.1Zr alloy had no influence on the HEAC susceptibility , despite 1 at% Ag partitioning in the GB η -Mg(Zn,Cu,Al) 2 and a minor decrease in the PFZ width.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Aluminum Alloy Microstructure Properties · Hydrogen embrittlement and corrosion behaviors in metals · High Temperature Alloys and Creep
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (85)
Show source-provided references
1. Environment-induced cracking of high-strength Al-Zn-Mg-Cu aluminum alloys: past, present, and future10.5006/4149 ↗
2. Recent developments in advanced aircraft aluminium alloys10.1016/j.matdes.2013.12.002 ↗
3. Recent advances in the development of aerospace materials10.1016/j.paerosci.2018.01.001 ↗
4. Comparison of the influence of chromium and zirconium on the quench sensitivity of Al-Zn-Mg-Cu alloys10.1007/BF02664256 ↗
5. Environmental cracking performance of new generation thick plate 7000-T7x series alloys in humid air10.1016/j.corsci.2020.108701 ↗
6. Multiscale analysis of grain boundary microstructure in high strength 7xxx Al alloys10.1016/j.actamat.2020.10.021 ↗
7. Hydrogen environmentally assisted cracking during static loading of AA7075 and AA744910.1016/j.msea.2019.138662 ↗
8. Environmentally Assisted Cracking in certain Aluminium Alloys, in: European Union Aviation Safety Agency (EASA) - Safety Information Bulletin Airworthiness 2018–04R2.
9. N.J.H. Holroyd, Environment-Induced Cracking of High-Strength Aluminum Alloys, in: R.P. Gangloff and M.B. Ives Environment-Induced Cracking of Metals NACE, Houston, TX, 1990, pp. 311-345.
10. Stress corrosion cracking of aluminum alloys10.1007/BF02672284 ↗
11. Crack propagation during sustained-load cracking of Al-Zn-Mg-Cu aluminum alloys exposed to moist air or distilled water10.1007/s11661-011-0793-x ↗
12. The postulated mechanisms for stress corrosion cracking of aluminum alloys: a review of the literature 1980-198910.5006/1.3585235 ↗
13. Environmentally assisted cracking of aluminium alloys10.1002/mawe.200700204 ↗
14. Stress corrosion cracking and hydrogen embrittlement of an Al–Zn–Mg–Cu alloy10.1016/j.actamat.2004.06.023 ↗
15. Influence of critical surface defects and localized competition between anodic dissolution and hydrogen effects during stress corrosion cracking of a 7050 aluminium alloy10.1016/S0921-5093(97)00369-9 ↗
16. The effects of test temperature, temper, and alloyed copper on the hydrogen-controlled crack growth rate of an Al-Zn-Mg-(Cu) alloy10.1007/s11661-002-0218-y ↗
17. 3D characterisation of hydrogen environmentally assisted cracking during static loading of AA7449-T765110.1007/s10704-021-00595-y ↗
18. Understanding the environmentally assisted cracking (EAC) initiation and propagation of new generation 7xxx alloys using slow strain rate testing10.1016/j.corsci.2022.110161 ↗
19. In-situ observation of environmentally assisted crack initiation and short crack growth behaviour of new-generation 7xxx series alloys in humid air10.1016/j.corsci.2023.111051 ↗
20. Quantitative Micro-Nano (QMN) Approach to SCC Mechanism and Prediction-Starting a Third Meeting
21. Environmentally induced crack (EIC) initiation, propagation, and failure: a 3D in-situ time-lapse study of AA5083 H13110.1016/j.corsci.2020.108834 ↗
22. Mechanisms of environmentally induced crack initiation in humid air for new-generation Al-Zn-Mg-Cu alloys10.5006/4336 ↗
23. Discontinuous propagation of stress corrosion cracks in Al·Zn·Mg alloys10.1016/0036-9748(79)90305-3 ↗
24. Stress-corrosion cracking of Al–Zn–Mg–Cu alloys effects of composition and heat-treatment
25. Some effects of alloy composition on stress corrosion cracking in Al–Zn–Mg–Cu alloys10.1016/j.corsci.2015.05.016 ↗
26. Hydrogen assisted cracking of high strength alloys10.1016/B0-08-043749-4/06134-6 ↗
27. The role of hydrogen and other interstitials in the mechanical behavior of metals10.1007/s13632-016-0319-4 ↗
28. Hydrogen-enhanced localized plasticity—a mechanism for hydrogen-related fracture10.1016/0921-5093(94)90975-X ↗
29. Hydrogen embrittlement phenomena and mechanisms10.1515/corrrev-2012-0502 ↗
30. Environmentally assisted cracking: overview of evidence for an adsorption-induced localised-slip process10.1016/0001-6160(88)90113-7 ↗
31. Hydrogen-accelerated spontaneous microcracking in high-strength aluminium alloys10.1038/s41598-020-58834-6 ↗
32. Suppressed hydrogen embrittlement of high-strength Al alloys by Mn-rich intermetallic compound particles10.1016/j.actamat.2022.118110 ↗
33. Hydrogen partitioning behavior and related hydrogen embrittlement in Al-Zn-Mg alloys10.1016/j.engfracmech.2019.106503 ↗
34. Stress corrosion cracking in Al-Zn-Mg-Cu aluminum alloys in saline environments10.1007/s11661-012-1528-3 ↗
35. Computational study of the geometrical influence of grain topography on short crack propagation in AA7XXX series alloys10.1016/j.mtla.2023.101798 ↗
36. Hydrogen trapping and embrittlement in high-strength Al alloys10.1038/s41586-021-04343-z ↗
37. Switching nanoprecipitates to resist hydrogen embrittlement in high-strength aluminum alloys10.1038/s41467-022-34628-4 ↗
38. On the role of traps in the microstructural control of environmental hydrogen embrittlement of a 7xxx series aluminum alloy10.1016/j.jallcom.2020.157300 ↗
39. Mechanisms of hydrogen embrittlement in high-strength aluminum alloys containing coherent or incoherent dispersoids10.1016/j.corsci.2021.109895 ↗
40. Microstructure evolution and localized corrosion susceptibility of an Al-Zn-Mg-Cu-Zr 7xxx alloy with minor Cr addition10.3390/ma16030946 ↗
41. Key microstructural features responsible for improved stress corrosion cracking resistance and weldability in 7xxx Series Al alloys containing micro / trace alloying additions10.4028/www.scientific.net/MSF.519-521.315 ↗
42. The influence of small additions of silver on the structure and properties of aged aluminum alloys10.1007/BF03378722 ↗
43. Fiji: an open-source platform for biological-image analysis10.1038/nmeth.2019 ↗
44. Revisiting Ag addition in 7xxx aluminum alloys: Insights into its impact on the microstructure and properties of an Al-Zn-Mg-Cu-Zr alloy with a Zn/Mg ratio of 410.1016/j.matchar.2024.114186 ↗
45. Hydrogen permeation measurements in aluminium alloy foils
46. O. Beyss, D. Zander, Characerization of the effective hydrogen diffusion in overaged 7xxx series Al alloys with a modified Devanathan-Stachurski permeation method, in, ICAA17, Poster-No.299534, 2020.
47. Hydrogen in aluminum during alkaline corrosion10.1016/j.electacta.2010.04.076 ↗
48. Effective hydrogen diffusion in aluminum alloy 5083-H131 as a function of orientation and degree of sensitization10.5006/0987 ↗
49. Hydrogen diffusivity during corrosion of high-purity aluminum10.5006/0826 ↗
50. The adsorption and diffusion of electrolytic hydrogen in palladium
51. ASTM G1 - 03: Standard Practice for Preparing, Cleaning, and Evaluating Corrosion Test Specimens (2017) in, ASTM International, PA USA.
52. The effect of Ag on the tensile strength and fracture toughness of novel Al-Mg-Zn alloys10.1016/j.jallcom.2022.164640 ↗
53. T. Ramgopal, P.I. Gouma, G.S. Frankel, Role of Grain-Boundary Precipitates and Solute-Depleted Zone on the Intergranular Corrosion of Aluminum Alloy 7150, Corrosion, 58 (2002) 687-697 10.5006/1.3287699%J Corrosion.10.5006/1.3287699 ↗
54. Characterisation of the composition and volume fraction of η′ and η precipitates in an Al–Zn–Mg alloy by a combination of atom probe, small-angle X-ray scattering and transmission electron microscopy10.1016/j.actamat.2005.03.004 ↗
55. Atomic-scale investigation of the heterogeneous precipitation in the E (Al18Mg3Cr2) dispersoid of 7075 aluminum alloy10.1016/j.jallcom.2020.156890 ↗
56. Interpretation of quench-sensitivity in Al-Zn-Mg-Cu Alloys10.1007/BF02643097 ↗
57. Age hardening response of AA7108A investigated by means of Synchrotron-based X-ray Absorption Spectroscopy (XAS) measurements10.1016/j.msea.2019.01.052 ↗
58. Effects of chromium and copper additions on precipitation in Al−Zn−Mg alloys10.1007/BF02913356 ↗
59. Mechanism of heterogeneous distribution of Cr-containing dispersoids in DC casting 7475 aluminum alloy10.1016/S1003-6326(22)65883-7 ↗
60. A trace element effect in alloys based on the aluminium-zinc-magnesium system10.1038/186303a0 ↗
61. Atom probe tomography of nanoscale microstructures within precipitate free zones in Al–Zn–Mg(–Ag) alloys10.1016/j.actamat.2010.06.046 ↗
62. Effect of cooling rate on the composition and chemical heterogeneity of quench-induced grain boundary η-phase precipitates in 7xxx aluminium alloys10.1016/j.actamat.2023.119443 ↗
63. Microanalytical study of the heterogeneous phases in commercial Al-Zn-Mg-Cu alloys10.1007/BF02662393 ↗
64. Structure of the aluminium: magnesium: zinc alloys10.1179/095066071790137865 ↗
65. Effect of Ag on aging precipitation behavior and mechanical properties of aluminum alloy 707510.1016/j.msea.2020.140515 ↗
66. Formation mechanisms of precipitate free zones in age-hardenable Al alloys
67. Solute-vacancy clustering in aluminum10.1016/j.actamat.2020.06.062 ↗
68. Precipitation at grain boundaries in the commercial alloy Al 707510.1016/0001-6160(86)90143-4 ↗
69. Hydrogen production, absorption and transport during environment assisted cracking of an Al-Zn-Mg-(Cu) alloy in humid air
70. Hydrogen diffusion and trapping in a low copper 7xxx aluminium alloy investigated by Scanning Kelvin Probe Force Microscopy10.1016/j.msea.2017.08.119 ↗
71. A classification of hydrogen traps in steel10.1007/BF02812023 ↗
72. Hydrogen solubility, diffusion and trapping in high purity aluminum and selected Al-base alloys10.4028/www.scientific.net/MSF.331-337.1583 ↗
73. Role of heat treatment and cathodic charging conditions on the hydrogen embrittlement of HP 7075 aluminum alloy10.1007/BF02782426 ↗
74. The diffusion and trapping of hydrogen in high purity aluminum10.1016/S1359-6454(98)00333-4 ↗
75. Grain size and grain-boundary effects on diffusion and trapping of hydrogen in pure nickel10.1016/j.actamat.2012.09.004 ↗
76. Combined microtomography, thermal desorption spectroscopy, X-ray diffraction study of hydrogen trapping behavior in 7XXX aluminum alloys10.1016/j.msea.2015.12.092 ↗
77. Hydrogen trapping and repelling in an Al-6 wt% Zn-2 wt% Mg alloy10.1007/BF01119730 ↗
78. First-principles study of hydrogen segregation at the MgZn2 precipitate in Al-Mg-Zn alloys10.1016/j.commatsci.2018.03.009 ↗
79. First-principles calculation of multiple hydrogen segregation along aluminum grain boundaries10.1016/j.commatsci.2018.10.015 ↗
80. Influence of dislocations on hydrogen diffusion and trapping in an Al-Zn-Mg aluminium alloy10.1016/j.matdes.2019.107901 ↗
81. Corrigendum to “Combined microtomography, thermal desorption spectroscopy, X-ray diffraction study of hydrogen trapping behavior in 7XXX aluminum alloys” [Mater. Sci. Eng. A 655 (2016) 221–22810.1016/j.msea.2016.05.010 ↗
82. Correlations between intergranular stress corrosion cracking, grain-boundary microchemistry, and grain-boundary electrochemistry for Al–Zn–Mg–Cu alloys10.1016/j.corsci.2010.08.024 ↗
83. Revisiting stress-corrosion cracking and hydrogen embrittlement in 7xxx-Al alloys at the near-atomic-scale10.1038/s41467-022-31964-3 ↗
84. Stress corrosion cracking of high strength aluminium alloys
85. The effect of solution heat-treatment on grain boundary segregation and stress-corrosion cracking of Al-Zn-Mg alloys10.1007/BF02646205 ↗