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Effect of SPD processing on the strength and conductivity of AA6061 alloy
journal contribution
posted on 2019-08-01, 00:00 authored by Y Qi, A Kosinova, E Lakin, V V Popov, E Rabkin, Rimma LapovokRimma LapovokThe extruded and artificially aged at 177 °C high strength commercial alloy AA6061-T651 is subjected to severe plastic deformation (SPD) by cyclic extrusion up to 1000% of the true strain at 400 °C. Unexpectedly, the electrical conductivity of the deformed alloy increased by 10% International Annealed Copper Standard (IACS), while the hardness dropped by only 40 HV. Further, it is shown that low temperature aging at 130 °C after SPD results in the following phenomena: the hardness of the alloy is restored almost to the initial level, with a slight decrease in conductivity, which still remained higher than in the original state. All microstructural parameters of the alloy including aluminum matrix composition, grain size, grain boundaries fraction, and morphology of the precipitates are characterized and correlated with the observed effect of SPD on the strength and electrical conductivity of alloy AA6061.
History
Journal
Advanced engineering materialsVolume
21Issue
8Article number
1801370Pagination
1 - 11Publisher
John Wiley & SonsLocation
Chichester, Eng.Publisher DOI
ISSN
1438-1656eISSN
1527-2648Language
engPublication classification
C1 Refereed article in a scholarly journalCopyright notice
2019, WILEY-VCH Verlag GmbH & Co. KGaA, WeinheimUsage metrics
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