Hydrogen effects during IGSCC of pure Al–5Mg alloy in NaCl media

Tanguy, D.; Bayle, B.; Dif, Robert; Magnin, T.

doi:10.1016/s0010-938x(01)00140-8

Cited by 43 publications

(15 citation statements)

References 12 publications

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“…However, it is noticed that an extremely small amount of hydrogen at the vicinity of a crack can sometimes have an important role in stress corrosion cracking. 43 In the present study, the local density of hydrogen could not be measured because the amount of absorbed hydrogen was taken as the mean value over the immersed area of a specimen. Details of the fracture morphologies as well as the examination of the local hydrogen concentration in the NaF solution should also be further studied.…”

Section: Discussionmentioning

confidence: 99%

Fracture associated with hydrogen absorption of sustained tensile‐loaded titanium in acid and neutral fluoride solutions

Yokoyama

Kaneko

Miyamoto

et al. 2003

J Biomedical Materials Res

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Abstract:The fracture of commercial pure titanium in acid and neutral fluoride solutions has been examined by a sustained tensile-loading test and hydrogen thermal desorption analysis. It was found that the fracture of titanium occurred in neutral 2.0% NaF solution as well as in 2.0% acidulated phosphate fluoride (APF) solution. The time to fracture decreased with increasing applied stress in both 2.0% APF and 2.0% NaF solutions. In the case of the same applied stress, the time to fracture in the 2.0% APF solution was shorter than that in the 2.0% NaF solution. General corrosion was exhibited on the side surface of the tested specimens. The formation of sodium titanium fluoride was observed on the surface of the immersed specimens in the 2.0% APF solution. Hydrogen desorption of the tested specimen in the 2.0% APF solution was observed with a peak at approximately 600°C. The amount of absorbed hydrogen was Ͼ300 mass ppm in the 2.0% APF solution under an applied stress for 24 h. The results of the present study imply that applying stress to titanium by immersing in fluoride solutions leads to the degradation of its mechanical properties.

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Section: Discussionmentioning

confidence: 99%

Fracture associated with hydrogen absorption of sustained tensile‐loaded titanium in acid and neutral fluoride solutions

Yokoyama

Kaneko

Miyamoto

et al. 2003

J Biomedical Materials Res

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“…Nonetheless, the fractographic features showed slow crack growth, suggesting active path corrosion as the dominant fracture mode in which an extremely small amount of hydrogen in the vicinity of a crack sometimes plays an important role. 45,46 …”

Section: Delayed Fracture Test In Neutral Naf Solutionsmentioning

confidence: 99%

Delayed fracture of Ni‐Ti superelastic alloys in acidic and neutral fluoride solutions

Yokoyama

Kaneko

Moriyama

et al. 2004

J Biomedical Materials Res

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Hydrogen-related degradation of the mechanical properties of a Ni-Ti superelastic alloy has been examined by means of delayed fracture tests in acidic and neutral fluoride solutions and hydrogen thermal desorption analysis. Delayed fracture took place in both solutions; the time to fracture was shorter in the acidic solutions than in the neutral solutions with the same fluoride concentration. The time to fracture was reduced in both solutions when applied stress exceeded the critical stress for martensite transformation. In the acidic solutions, Ni-Ti superelastic alloy underwent general corrosion and absorbed substantial amounts of hydrogen. Fractographic features suggested that the delayed fracture in the acidic solutions was attributable to hydrogen embrittlement, whereas in the neutral solutions, a different fracture mode appeared associated with localized corrosion only in the vicinity of the fracture initiation area. In the neutral solutions, the amount of absorbed hydrogen was much less than that in the acidic solutions, and the delayed fracture was likely to be induced by active path corrosion accompanying hydrogen absorption. The results of the present study imply that the hydrogen-related degradation of performance of Ni-Ti superelastic alloys occurs in the presence of fluoride.

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“…Therefore, grain boundary dissolution would be necessary to generate hydrogen but it would not directly control crack propagation along grain boundaries. A similar mechanism has been proposed to account for intergranular stress corrosion cracking in a pure Al-5 Mg alloy [18].…”

Section: Results and Analysismentioning

confidence: 79%

Influence of corrosion and creep on intergranular fatigue crack path in 2XXX aluminium alloys

Hénaff

Menan

Odemer

2010

Engineering Fracture Mechanics

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OATAO is an open access repository that collects the work of Toulouse researchers and makes it freely available over the web where possible. a b s t r a c tIn this paper, two examples of the influence of time-dependent processes on crack path in two 2XXX aluminium alloys are presented. The first example is concerned with corrosionfatigue crack growth resistance of a 2024 T351 alloy cracked in the S-L direction in 3.5% NaCl solution at free corrosion potential. The second example deals with the elevated temperature crack growth resistance of a 2650 T6 alloy that might be used in future supersonic aircraft fuselage panels. The common idea is to correlate quantitative measurements of relevant fractographic features of crack path to the effects of time-dependent processes on crack growth rates.

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Hydrogen effects during IGSCC of pure Al–5Mg alloy in NaCl media

Cited by 43 publications

References 12 publications

Fracture associated with hydrogen absorption of sustained tensile‐loaded titanium in acid and neutral fluoride solutions

Fracture associated with hydrogen absorption of sustained tensile‐loaded titanium in acid and neutral fluoride solutions

Delayed fracture of Ni‐Ti superelastic alloys in acidic and neutral fluoride solutions

Influence of corrosion and creep on intergranular fatigue crack path in 2XXX aluminium alloys

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