The Effect of Cold Rolling on the Hydrogen Susceptibility of 5083 Aluminum Alloy

Georgiou, E.P.; Celis, J.-P.; Panagopoulos, C.

doi:10.3390/met7110451

Cited by 14 publications

(10 citation statements)

References 30 publications

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“…In addition, brittle fracture by cleavage (indicated by blue arrows in Figure 5b) can be seen at the surface layers of the alloy after SSRT testing in alkaline pH. This brittle pattern is a result of both pinning of dislocations by the solute hydrogen atoms and to the formation and fracture of aluminum hydrides [20,27]. Further analysis of the brittle zones shown in Figure 4b,d revealed cleavage-like morphologies [24], Figure 5a,b, respectively.…”

Section: Resultsmentioning

confidence: 99%

“…Indeed, intermetallic phases are known to improve the mechanical performance of aluminum alloys [1,2], but can also lead to localized galvanic corrosion [1,2,18]. In addition, the size and distribution of grains should be taken into consideration as grain boundaries are easy paths for the diffusion of halide ions [20], but also present obstacles to dislocation movement and multiplication during mechanical deformation [20]. Thus, it is of key importance to correlate the microstructure with the functionality of the alloy.…”

Section: Of 10mentioning

confidence: 99%

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Effect of pH on Stress Corrosion Cracking of 6082 Al Alloy

Panagopoulos

Georgiou

Giannakopoulos

et al. 2018

Metals

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In this work, the effect of pH (3, 7 and 10) on the stress corrosion cracking behavior of 6082 aluminum alloy, in a 0.3 M sodium chloride (NaCl) aqueous based solution was investigated. The stress corrosion cracking behavior was studied with slow strain rate testing, whereas failure analysis of the fractured surfaces was used to identify the dominant degradation mechanisms. The experimental results clearly indicated that stress corrosion cracking behavior of this aluminum alloy strongly depends on the pH of the solution. In particular, the highest drop in ultimate tensile strength and ductility was observed for the alkaline pH, followed by the acidic, whereas the lowest susceptibility was observed in the neutral pH environment. This observation is attributed to a change in the dominant stress corrosion cracking mechanisms.

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Section: Resultsmentioning

confidence: 99%

Section: Of 10mentioning

confidence: 99%

Effect of pH on Stress Corrosion Cracking of 6082 Al Alloy

Panagopoulos

Georgiou

Giannakopoulos

et al. 2018

Metals

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“…The recovery process of metal is inhibited at cryogenic temperature. With the increase of deformation, production rate of the dislocation is slightly higher than recovery rate [15,16]. Therefore, tensile strength and yield strength of AA 8011 increased after deep cryogenic rolling for 6 times.…”

Section: Optical Microstructurementioning

confidence: 93%

Effects of annealing treatment on mechanical properties of 8011 aluminum alloy after cryogenic rolling

Cui

Chen

Li³

et al. 2019

Metall. Res. Technol.

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In order to improve mechanical properties of roll cast 8011 aluminum alloy (AA 8011) by grain strengthening, and expand its application field, the effect of different annealing treating processes on mechanical properties and microstructures of cryogenic rolled AA 8011 was investigated. The roll cast AA 8011 was cryogenic rolled for six passes and then annealed. The annealing treatment was adopted at 100–300 °C for 1 h, and then the annealing treatment was adopted at 220 °C for 10–80 min. The microstructures of AA 8011 under roll cast and cryogenic rolled states were studied by using OM. The grain size was calculated by the Image-pro-plus 5.0. The microstructures of AA 8011 under annealing states were observed by using TEM and energy dispersive spectrum analysis. The results show that the second phase Al8Fe2Si appears in the cryogenic rolled AA 8011 after annealing treatment. When the dislocation moves in the grain, the dislocation plays a pinning role, which is conducive to grain refinement. The optical annealing treatment was treated at 220 °C for 40 min with optimal thermal stability. The ideal grain size is 1 μm, hardness is 65 HV, and tensile strength is 202 MPa. It is about 1.5 times of the roll cast AA 8011.

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“…e hydrogen was found to be the major cause of the porosity. ey adjusted heat input using the optimized parameters to avoid pores and reduce the influence of hydrogen [12]. In consideration of hydrogen is the major active gas element leading to porosity in aluminum alloys, Obaldia et al calculated the volume fraction of hydrogeninduced microporosity in castings of A356 aluminum alloy by extending a model of dendritic solidification.…”

Section: Introductionmentioning

confidence: 99%

Influence of Hydrogen Content on the Microstructure and Mechanical Properties of ER5183 Wires

Han

Xue

et al. 2019

Advances in Materials Science and Engineering

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This work focused on the influence of hydrogen content on the microstructure and mechanical properties of ER5183 Al-Mg-Mn alloy wires for aluminum alloy welding. The hydrogen content of the ER5183 wires was measured, the macroscopic and microscopic morphologies of fractures were observed as well as the microstructure of the wires, and the tensile strength of the wires was also tested and investigated. The experimental results demonstrated three typical irregular macroscopic fractures of the wires appeared during the drawing process when the hydrogen content exceeded 0.23 μg/g. In the meantime, the aggregated pores were observed in the microstructure of the ϕ5.2 mm wire with the hydrogen content of 0.38 μg/g. Such defects may become the origin of cracks in subsequent processing and tensile tests. Moreover, higher hydrogen content in the ϕ5.2 mm welding wire will bring obvious changes in the fracture surface, which are internal cracks and micropores replacing the original uniform and compact dimples. With the higher hydrogen content, the tensile strength and plastic strain rate of ϕ1.2 mm wires would decrease. At the same time, unstable crack propagation would occur during the process of plastic deformation, leading to fracture. Considering the mechanical properties and microstructure, the hydrogen content of the ER5183 wires should be controlled below 0.23 μg/g.

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The Effect of Cold Rolling on the Hydrogen Susceptibility of 5083 Aluminum Alloy

Cited by 14 publications

References 30 publications

Effect of pH on Stress Corrosion Cracking of 6082 Al Alloy

Effect of pH on Stress Corrosion Cracking of 6082 Al Alloy

Effects of annealing treatment on mechanical properties of 8011 aluminum alloy after cryogenic rolling

Influence of Hydrogen Content on the Microstructure and Mechanical Properties of ER5183 Wires

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