Influence of copper additions on materials properties and corrosion behaviour of Al–Mg alloy sheet

Engler, Olaf; Marioara, Calin Daniel; Hentschel, Thomas; Brinkman, Henk-Jan

doi:10.1016/j.jallcom.2017.03.298

Cited by 36 publications

(11 citation statements)

References 40 publications

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“…There is evidence that additions of less than 0.5at%Cu to 5XXX-series aluminum alloys can counterbalance the softening experienced by stamped then 'paint baked' (⇠ 150-200 C for ⇠ 20 min) automotive aluminum components [1,2,3]. Being able to retain the as-stamped strength in this way facilitates both reduced material usage and adoption of lower grade Cu-residual scrap in primary alloy production [4].…”

Section: Introductionmentioning

confidence: 99%

Cluster hardening in Al-3Mg triggered by small Cu additions

et al. 2018

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The aging response of two Al-3Mg alloys with Cu addition <1 wt% has been tracked under simulated automotive paint bake conditions (⇠ 20 min, 160 and 200 C) to quantify the processes controlling hardening. The decomposition of the solid solution, observed by atom probe tomography, has been interpreted using a novel pair correlation function approach and incorporated into a model for prediction of precipitation hardening. It is shown that the hardening is controlled by clusters/Guinier-Preston-Bagaryatsky (GPB) zones similarly to what has been previously observed in much higher Cu containing 2XXX-series alloys. Interestingly, it is shown that very small additions of Cu (< 0.1at%) can be used to catalyze a high number density of strengthening particles owing to the high enrichment in Mg compared to particles found in more conventional high Cu/low Mg alloys. This allows hardening during the first hour of aging that is as high as that obtainable in these high Cu alloys.

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Section: Introductionmentioning

confidence: 99%

Cluster hardening in Al-3Mg triggered by small Cu additions

et al. 2018

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“…This effect is caused by the formation of Zn‒Mg clusters (T-phase (Mg 32 (Al, Zn) 49 ) precursor) during NA, which causes depletion of solute Mg in the matrix [68,69]. A similar effect can be assumed for Cu‒Mg cluster formation in Cu-modified alloys [55]. Likewise, the marked increase in strength can be attributed to the hardening effect of the clusters/GP zones formed during NA [50].…”

Section: Discussionmentioning

confidence: 99%

“…Due to the underlying mechanisms, a reduction in Mg content might be the most plausible way to reduce SSM [27,28,30,35,41,42,43,44,45,46]. However, because a slightly reduced Mg content is unlikely to be sufficient to completely eliminate SSM, and adverse property changes might occur if the Mg content is too low, alloying with other elements such as Mn, Zn, Cu and Zr or a combination of them may have a positive impact [47,48,49,50,51,52,53,54,55,56,57,58]. Cu and Zn additions, in particular, have shown potential for improving mechanical properties as well as reducing SSM [47,48,49,50].…”

Section: Introductionmentioning

confidence: 99%

Effect of Compositional and Processing Variations in New 5182-Type AlMgMn Alloys on Mechanical Properties and Deformation Surface Quality

Ebenberger

Uggowitzer

Gerold³

et al. 2019

Materials

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Laboratory-scale sheets of 5182-type AlMgMn alloys with varying Mg and Mn contents and additions of different amounts of Zn, Cu, Zr and Er were studied. The sheets were produced using two different cold-rolling degrees and two soft-annealing treatment procedures: air-circulated furnace annealing at 370 °C with subsequent furnace cooling, and salt-bath annealing with subsequent water quenching. Mechanical properties and deformation surface quality were studied via tensile tests with simultaneous visual surface characterization. The influence of the chemical composition and the processing route on grain size, mechanical properties, and surface quality is discussed in the study. A reduction in the Mg content improves the surface quality after plastic deformation, but at the expense of the mechanical properties. The results suggest the presence of an optimum Mn content in terms of optical appearance and mechanical properties. Adding Zr largely inhibits recrystallization, which is reflected in a textured microstructure. Adding Er affects neither the surface quality nor the mechanical properties. Specific combinations of Zn or Cu addition, cold-rolling degree, and heat treatment generate significant improvements in the mechanical and optical properties. In general, annealing at high temperature with subsequent quenching leads to enhanced surface quality and mechanical properties, and adding Zn enables further noteworthy improvements.

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“…5XXX series aluminum alloys are widely used in aerospace, automobile and ship due to their low density, high specific strength, good corrosion resistance and easy processing [16][17][18][19]. The 5052 aluminum alloy is one of the most typical and commonly used aluminum alloys in the 5XXX series only containing Mg as a strengthening element.…”

Section: Introductionmentioning

confidence: 99%

Effect of Er on Microstructure and Mechanical Properties of 5052 Aluminum Alloy with Big Width-To-Thickness Ratio

et al. 2020

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The effect of Er on microstructure and mechanical properties of the 5052 aluminum alloy with a big width-to-thickness ratio was investigated by a metallurgical microscope, scanning electron microscope and tensile testing machine. The results showed that the precipitates were slightly refined after Er addition and Al3Fe was transformed into Al6Fe and AlEr with/without a small amount of Fe or Si. The effect of Er on grain refinement was related to its content. When Er content was lower or higher than 0.4%, the grain would coarsen. Homogenization could refine the grain by controlling Er content and distribution in the Al matrix. Long time homogenization at high temperature would significantly reduce the strength of the 5052 aluminum alloy and 5052 aluminum alloys with low Er content, but help to improve the plasticity of those with high Er content. The ultimate tensile strength, yield strength and elongation of the as-cast 5052 aluminum alloy were 197 MPa, 117 MPa and 22.5% respectively. The strength was the highest, when Er content was 0.4 wt. % and the elongation was the best at 0.1 wt. % Er content.

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Influence of copper additions on materials properties and corrosion behaviour of Al–Mg alloy sheet

Cited by 36 publications

References 40 publications

Cluster hardening in Al-3Mg triggered by small Cu additions

Cluster hardening in Al-3Mg triggered by small Cu additions

Effect of Compositional and Processing Variations in New 5182-Type AlMgMn Alloys on Mechanical Properties and Deformation Surface Quality

Effect of Er on Microstructure and Mechanical Properties of 5052 Aluminum Alloy with Big Width-To-Thickness Ratio

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