On the Stress corrosion cracking behaviour of aluminium alloy sheet in an aqueous solution of 3% NaCl + 0.3% H<sub>2</sub>O<sub>2</sub>

Braun, Reinhold

doi:10.1002/maco.19940450502

Cited by 19 publications

(4 citation statements)

References 9 publications

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“…When exposed to relatively high solution heat treatment temperatures followed by slow quenching, naturally aged 6061-T4 was found to be susceptible to stress corrosion cracking in laboratory tests [29]. Using the slow strain rate testing technique, susceptibility against environment-induced cracking was indicated for 6061-T4 sheet, whereas 6013 sheet in the peak-aged T6 temper was immune to intergranular stress corrosion cracking [30]. Using the slow strain rate testing technique, susceptibility against environment-induced cracking was indicated for 6061-T4 sheet, whereas 6013 sheet in the peak-aged T6 temper was immune to intergranular stress corrosion cracking [30].…”

Section: Resultsmentioning

confidence: 99%

Laser beam welding and friction stir welding of 6013-T6 aluminium alloy sheet

Braun

Donne

Staniek

2000

Mat.-wiss. u. Werkstofftech.

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Butt welds of 1.6 mm thick 6013‐T6 sheet were produced using laser beam welding and friction stir welding processes. Employing the former joining technique, filler powders of the alloys Al‐5%Mg and Al‐12%Si were used. Microstructure, hardness profiles, tensile properties and the corrosion behaviour of the welds in the as‐welded condition were investigated. The hardness in the weld zone was lower compared to that of the base material in the peak‐aged temper. Hardness minima were measured in the fusion zone and in the thermomechanically affected zone for laser beam welded and friction stir welded joints, respectively. Metallographic and fractographic examinations revealed pores in the fusion zone of the laser beam welds. Porosity was higher in welds made using the filler alloy Al‐5%Mg than using the filler metal Al‐12%Si. Transmission electron microscopy indicated that the β″ (Mg2Si) hardening precipitates were dissolved in the weld zone due to the heat input of the joining processes. Joint efficiencies achieved for laser beam welds depended upon the filler powders, being about 60 and 80% using the alloys Al‐5%Mg and Al‐12%Si, respectively. Strength of the friction stir weld approached over 80% of the ultimate tensile strength of the 6013‐T6 base material. Fracture occurred in the region of hardness minima unless defects in the weld zone led to premature failure. The heat input during welding did not cause a degradation of the corrosion behaviour of the welds, as found in continuous immersion tests in an aqueous chloride‐peroxide solution. In contrast to the 6013‐T6 parent material, the weld zone was not sensitive to intergranular corrosion. Alternate immersion tests in 3.5% NaCl solution indicated high stress corrosion cracking resistance of the joints. For laser beam welded sheet, the weld zone of alternately immersed specimens suffered severe degradation by pitting and intergranular corrosion, which may be associated with galvanic coupling of filler metal and parent material.

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Section: Resultsmentioning

confidence: 99%

Laser beam welding and friction stir welding of 6013-T6 aluminium alloy sheet

Braun

Donne

Staniek

2000

Mat.-wiss. u. Werkstofftech.

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“…[3][4][5] A probable embrittlement in hydrogen environments has been also reported. 6) Then it becomes an important issue to evaluate the properties with respect to SCC and hydrogen embrittlement (HE) for the sake of securing the reliability.…”

Section: Introductionmentioning

confidence: 81%

Contribution of Hydrogen Embrittlement to SCC Process in Excess Si Type Al-Mg-Si Alloys

Osaki

Kondo²,

Kinoshita

2006

Mater. Trans.

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For underaged Al-Mg-Si alloys with excess Si, No. 5(Al-0.7 mass%Mg-1.1 mass%Si) and No. C5 with 0.2 mass%Cr addition, SSRT tests have been carried out to reveal the contribution of hydrogen embrittlement (HE) to SCC processes at strain rate 6:9 Â 10 À7 s À1 under three environments; ‹dry nitrogen gas, ›wet air with 90% relative humidity and fian acid sodium chloride (ISO) solution. Under env.›, alloy No. 5 with coarse grains shows a decrease in elongation comparing with that under the inert env.‹, while alloy No. C5 with finer gains exhibits rather an increase. The small areas of intergranular(IG)-and transgranular(TG)-facets both with a feature of wavy slips are observed in contact with the free-surface of the specimens, respectively, which are regarded as an evidence of hydrogen-enhanced localized plasticity. Under env.fi, alloy No. 5 shows a high susceptibility to SCC, while alloy No. C5 exhibits a low one improved through Cr addition. On SCC fracture surface of alloy No. 5, three modes of IG one with crystallographic pits, IG another with fine ledges and TG one with an appearance of quasi-cleavage are presented, which indicates that the mechanism of plastic deformation localization induced by anodic dissolution plays a dominant role in the SCC. Even though HE is involved in the SCC process, the effect is estimated to remain small.

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“…The superhydrophobic textured surfaces of aluminum alloy have enhanced resistance to the pitting corrosion [46]. To study the corrosion behavior and to conduct rapid analysis, hydrogen peroxide is widely used [47][48][49][50][51]. The use of H 2 O 2 results in an increased dissolution/oxidation rate.…”

Section: Introductionmentioning

confidence: 99%

Effect of Corrosion and Wall Textures on Wettability and Heat Flux at Non-Isothermal Conditions

Misyura

2021

Coatings

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The corrosion behavior, evaporation and heat transfer of aluminum alloy during droplet evaporation of an aggressive solution of NaCl and hydrogen peroxide in water have been studied experimentally. To date, the effect of corrosion on the evaporation and heat transfer of droplet salt solutions on textured surfaces remains insufficiently explored. The corrosion resistance of the material and the contact angle increase with an increase in the number of laser penetrations after laser texturing. Studies conducted using an electron microscope and Energy-Dispersive X-ray Spectroscopy (EDS) mapping show that the maximum amount of adsorbed hydrocarbon impurities falls on areas with a large number of pits. In the process of metal corrosion, wettability and heat transfer change. In spite of the fact that laser exposure significantly increases the corrosion resistance, the wettability of the wall changes significantly due to corrosion. The wetted diameter of a droplet changes over time, which leads to an increase in the evaporation rate and heat flux. The heat flux during evaporation of a droplet on a heated wall depends on the water droplet diameter, the texture of the wall and the corrosion resistance.

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On the Stress corrosion cracking behaviour of aluminium alloy sheet in an aqueous solution of 3% NaCl + 0.3% H₂O₂

Cited by 19 publications

References 9 publications

Laser beam welding and friction stir welding of 6013-T6 aluminium alloy sheet

Laser beam welding and friction stir welding of 6013-T6 aluminium alloy sheet

Contribution of Hydrogen Embrittlement to SCC Process in Excess Si Type Al-Mg-Si Alloys

Effect of Corrosion and Wall Textures on Wettability and Heat Flux at Non-Isothermal Conditions

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On the Stress corrosion cracking behaviour of aluminium alloy sheet in an aqueous solution of 3% NaCl + 0.3% H2O2

Cited by 19 publications

References 9 publications

Laser beam welding and friction stir welding of 6013-T6 aluminium alloy sheet

Laser beam welding and friction stir welding of 6013-T6 aluminium alloy sheet

Contribution of Hydrogen Embrittlement to SCC Process in Excess Si Type Al-Mg-Si Alloys

Effect of Corrosion and Wall Textures on Wettability and Heat Flux at Non-Isothermal Conditions

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On the Stress corrosion cracking behaviour of aluminium alloy sheet in an aqueous solution of 3% NaCl + 0.3% H₂O₂