The Benefits of Trace Cu in Wrought Al-Mg Alloys

  title={The Benefits of Trace Cu in Wrought Al-Mg Alloys},
  author={S. Medrano and H. Y. Zhao and Baptiste Gault and Fr{\'e}d{\'e}ric De Geuser and Chad W. Sinclair},
  journal={arXiv: Materials Science},
The softening and strengthening contributions in pre-deformed and aged Al-Mg-Cu alloys containing 3wt.%Mg and 0.5wt.%Cu are evaluated by a combination of microscopy, mechanical testing and modelling. A refined phenomenological model for the work hardening response, accounting for the separate effects of recovery and precipitation, is shown to be suitable for an unambiguous determination of the precipitation hardening contribution in these alloys. Significantly, it is found that the mechanical… 


Study of concurrent recovery and precipitation on the mechanical behaviour of Al-Mg alloys with small additions of Cu
Aluminum-magnesium alloys are commonly used as wrought products in the automotive industry. Cold forming of such alloys leads to strengthening by work hardening but some of this strength can be lost
Cluster hardening in Al-3Mg triggered by small Cu additions
Abstract 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
Transient strain age hardening of Al–Mg alloys
Abstract The static strain aging response of an Al-Mg alloy is investigated by means of tensile pre-deformation followed by annealing. The mechanical response following re-testing in tension reveals
Modeling the effect of Al3Sc precipitates on the yield stress and work hardening of an Al–Mg–Sc alloy
Abstract The yield stress and work hardening behaviour of precipitation hardening alloys is directly related to the nature of the interaction between mobile dislocations and precipitates. In
Influence of copper additions on materials properties and corrosion behaviour of Al–Mg alloy sheet
Abstract Additions of a few tenths of a percent of Cu to Al–Mg alloys give rise to a noticeable age-hardening effect. This can be utilized to overcome the softening during paint curing of
Microstructural evolution during ageing of Al–Cu–Li–x alloys
Abstract In this study, atom probe tomography was used to investigate the microstructure of the alloy AA2198 (Al–1.35 Cu–3.55 Li–0.29 Mg–0.08 Ag) over a range of ageing conditions to examine the
Precipitation behaviors in Al-Cu-Mg and 2024 aluminum alloys
The precipitation behaviors and aging reactions of the pseudobinary Al-Cu-Mg alloy and the commercial 2024 alloy under unstretched and stretched conditions have been investigated in this study by
Precipitation hardening of an Al-4.2 wt% Mg-0.6 wt% Cu alloy
Abstract The precipitation hardening of an experimental Al–4.2 wt% Mg–0.6 wt% Cu alloy has been studied. After a first initial jump, the yield strength increases almost linearly with the logarithm of
Origins of hardening in aged AlGuMg(Ag) alloys
Explanations are presented for the origins of hardening in the artificially aged alloys Al1.1Cu1.7Mg(0.1Ag) (at.%), which differ from those hitherto accepted. These and other compositions which
Recovery kinetics in the presence of precipitates: The softening response of an Al–Mg–Sc alloy
Abstract Recovery of an Al–Mg–Sc alloy in the presence of Al 3 Sc precipitates has been studied. The results demonstrate that recovery can be separated into two stages. The initial stage is