Microstructural behaviour of hot deformed AA 6015 alloy. (4th August 2014)

• Record Type: Journal Article
• Authors: Evangelista, E .; Forcellese, A.; Gabrielli, F .; Mengucci, P.
• Is Part Of: International journal of material & product technology. Volume 5:Number 1(1990)
• Page Start: 84
• Page End: 94
• Publication Date: 2014-08-04
• Subjects: aluminium alloys -- dynamic recovery -- recrystallization -- hot workability -- microstructure -- hot working -- torsion tests -- deformation; Manufacturing processes -- Periodicals; Materials -- Testing -- Periodicals; 620.11
• Languages: English
• ISSNs: 0268-1900

Abstract

The hot workability of AA 6015 alloy has been studied by means of torsion tests over the temperature range 300–500°C and strain rate of 0.1 s −1 . The ductility was very low at 300–350°C but attained large values at higher temperatures. Optical microscopy showed original grains partially elongated up to 350°C and recrystallized grains at higher temperatures. Electron metallography revealed a distribution of fine Mg2 Si precipitates with unrecovered structures at lower temperatures and well defined subgrain with the presence of large Mg2 Si particles at temperatures higher than 400°C. The effect of precipitate size on dynamic restoration was analysed.