Decomposition of Solid Solution of the AA5083 Alloy upon Exposure to Elevated Temperatures

Sampath, D.; Moldenhauer, S.; Schipper, H.R.; Mechsner, K.; Haszler, A.

doi:10.4028/www.scientific.net/msf.331-337.1089

Cited by 12 publications

(5 citation statements)

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“…ER5356 and ER5087 welding wires are both Al-Mg alloys, Al-Mg welding wires increases the content of Mg in the weld zone and forms strengthening phase Al 8 Mg 5 (β phase) [ 4 , 5 , 31 ]. When the content of Mg element in Al-Mg alloy exceeded 3%, it was very sensitive to stress corrosion cracking due to the precipitation of Al 8 Mg 5 at the grain boundary, which was an anode relative to the matrix α-Al and would be preferentially corroded [ 32 , 33 ]. Therefore, the corrosion resistance of the weld mainly depends on the microstructure quantity as well as the size and distribution of the β-Al 8 Mg 5 [ 34 ].…”

Section: Resultsmentioning

confidence: 99%

Electrochemical Corrosion Behavior of MIG-Welded 7N01-T4 Aluminum Alloy by ER5356 and ER5087 Welding Wires

Wei

Liu

et al. 2022

Materials

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7N01-T4 aluminum alloy plates were welded by the metal inert gas (MIG) welding method, with ER5087 and ER5356 welding wires, respectively. The electrochemical corrosion behavior of the weld zones in the two kinds of welded joints using 3.5 wt.% and 5 wt.% NaCl solutions were investigated by polarization curve, electrochemical impedance spectroscopy (EIS), scanning electron microscope (SEM), and laser confocal scanning microscope (LCSM). The results indicated the better corrosion resistance of the weld zone in the ER5356 welded joint than that in the ER5087 welded joint, which was related to the different contents of Mn and Zn elements and the distribution of precipitates for the weld zones in the two kinds of welded joints. Based on the LSCM of the weld zones, the maximum depth (dmax) of corrosion pits for the weld zone in the ER5356 welded joint was lower than that in the ER5087 welded joint when immersed in the same NaCl concentrations. The dmax of the corrosion pit of the weld zone in the ER5356 welded joint using the 5 wt.% NaCl solution was 78.5 ± 0.96 μm, which was much bigger than that using the 3.5 wt.% NaCl solution. For the weld zone in the ER5087 welded joint with 5 wt.% NaCl solution, more Cl- was adsorbed onto the active surface of weld zones, which accelerated the corrosion, resulting in the corrosion mechanism from pitting to intergranular corrosion.

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Section: Resultsmentioning

confidence: 99%

Electrochemical Corrosion Behavior of MIG-Welded 7N01-T4 Aluminum Alloy by ER5356 and ER5087 Welding Wires

Wei

Liu

et al. 2022

Materials

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“…It can be seen that there is a wide variation in measurements even within the as-received material, but there is a general downward trend in the Mg concentration with increasing time. Sampath et al 43 estimated the Mg solid solution content via electrical conductivity in 5083-O. They reported the time to reach a Mg content of 4 wt% (down from initial value of 4.5 wt%) at several temperatures.…”

Section: Magnesium Solid Solution Strengtheningmentioning

confidence: 99%

An Analysis of Variability in Sensitization Behavior of 5083-H131 and the Impacts on Yield Strength

Murdoch,

Magagnosc,

Blohm

et al. 2023

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“…For Al-12wt% Mg alloy, b 0 phase begins to be formed at 100 8C and accelerates at 150 8C [9] while for AA5083-H131 alloy, b phase is observed after sensitizing at 100 8C for different exposure times [10]. The precipitation rate of b phase was reported to be maximum between 150 and 200 8C [11].…”

Section: Introductionmentioning

confidence: 99%

Effect of low temperature sensitization on the susceptibility to intergranular corrosion in AA5083 aluminum alloy

Wei

González

Hashimoto

et al. 2015

Materials & Corrosion

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The effect of thermal exposure at 70 and 100 8C on intergranular corrosion (IGC) susceptibility of AA5083 alloy has been studied. At both temperatures, metastable b 0 phase has been detected at grain boundaries. The thermal exposure resulted in sensitized microstructure in the alloy and, consequently, increased mass loss values during the nitric acid mass loss test (NAMLT). The sensitization of the alloy is related to the formation of the b 0 phase. The asreceived O temper alloy showed relatively high resistance to IGC and exhibited a discontinuous distribution of the b 0 phase precipitates at grain boundaries. After exposure at 70 8C for 480 h, the size of b 0 phase precipitate at the grain boundaries slightly increased, resulting in an increased mass loss. After exposure at 100 8C for 240 h, the alloy became severely sensitized due to the more continuous distribution of b 0 phase precipitate along the grain boundaries.

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Decomposition of Solid Solution of the AA5083 Alloy upon Exposure to Elevated Temperatures

Cited by 12 publications

References 0 publications

Electrochemical Corrosion Behavior of MIG-Welded 7N01-T4 Aluminum Alloy by ER5356 and ER5087 Welding Wires

Electrochemical Corrosion Behavior of MIG-Welded 7N01-T4 Aluminum Alloy by ER5356 and ER5087 Welding Wires

An Analysis of Variability in Sensitization Behavior of 5083-H131 and the Impacts on Yield Strength

Effect of low temperature sensitization on the susceptibility to intergranular corrosion in AA5083 aluminum alloy

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