TY - JOUR
T1 - The effect of trace level copper content on intergranular corrosion of extruded AA6082-T6 alloys
AU - Bartawi, E.H.
AU - Mishin, O.V.
AU - Shaban, G.
AU - Grumsen, F.
AU - Nordlien, J. H.
AU - Ambat, R.
PY - 2023
Y1 - 2023
N2 - The effect of trace level Cu content on intergranular corrosion in an
acidified salt solution has been systematically studied in four
AA6082-T6 extrusions containing 0.001, 0.02, 0.03 and 0.05 wt% Cu.
Although these Cu concentrations are smaller than those expected to
directly contribute to intergranular corrosion (IGC) in aged AA6082
alloys, IGC is observed in the present experiment even in alloy with the
lowest Cu content. Whereas the extent of IGC is negligibly small in the
alloy containing 0.001 wt% Cu, it increases with increasing Cu content.
Profound IGC is observed in the alloy containing 0.05 wt% Cu.
Microstructural characterization reveals Cu segregations along some
grain boundaries in each alloy. There are, however, differences in the
size and number density of precipitates as well as in the width of
precipitate free zones between the different samples.
AB - The effect of trace level Cu content on intergranular corrosion in an
acidified salt solution has been systematically studied in four
AA6082-T6 extrusions containing 0.001, 0.02, 0.03 and 0.05 wt% Cu.
Although these Cu concentrations are smaller than those expected to
directly contribute to intergranular corrosion (IGC) in aged AA6082
alloys, IGC is observed in the present experiment even in alloy with the
lowest Cu content. Whereas the extent of IGC is negligibly small in the
alloy containing 0.001 wt% Cu, it increases with increasing Cu content.
Profound IGC is observed in the alloy containing 0.05 wt% Cu.
Microstructural characterization reveals Cu segregations along some
grain boundaries in each alloy. There are, however, differences in the
size and number density of precipitates as well as in the width of
precipitate free zones between the different samples.
U2 - 10.1016/j.matchemphys.2023.128303
DO - 10.1016/j.matchemphys.2023.128303
M3 - Journal article
SN - 0254-0584
VL - 309
JO - Materials Chemistry and Physics
JF - Materials Chemistry and Physics
M1 - 128303
ER -