| Numéro |
J. Phys. Colloques
Volume 48, Numéro C3, Septembre 1987
4th International Aluminium Lithium Conference
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|---|---|---|
| Page(s) | C3-661 - C3-667 | |
| DOI | https://doi.org/10.1051/jphyscol:1987376 | |
J. Phys. Colloques 48 (1987) C3-661-C3-667
DOI: 10.1051/jphyscol:1987376
INFLUENCE OF PROCESSING CONDITIONS ON THE MONOTONIC PROPERTIES OF 8090 ALLOY
C. DAMERVAL, J.L. RAVIART et G. LAPASSETONERA, 29, Avenue de la Division Leclerc, B.P. 72, F-92322 Châtillon Cedex, France
Abstract
Three processing conditions, namely quench rate after solution heat treatment, cold work prior to aging and aging conditions, were varied and their effect on the mechanical properties of 8090 extruded flat bars was evaluated. The influence of cold work and aging conditions was examined on the underaged material for the same proof strength level. A slow quench is unfavourable both for tensile properties and SL fracture toughness due to a heavy precipitation of stable phases within grain (and subgrain) boundaries. For a same proof strength level, raising the aging temperature from 170 to 210°C improves ductility. This effect mainly results from an increased resistance to shear rupture, which is related to changes in precipitation characteristics.