Eddahbi, Mohamed Ou LahcenMonge Alcázar, Miguel ÁngelBorrego, A.González-Doncel, G..2014-12-122014-12-122012-10Materials Science and Engineering A 555 (2012) 154–1640921-5093https://hdl.handle.net/10016/19682The microstructure and the texture of extruded 6061 Al alloy processed by powder metallurgy (PM), using three different initial powder particle sizes, have been studied after torsion deformation at 300 °C at strain rate of 6 s−1. The initial extruded microstructure of the three alloys consisted of elongated grains confining substructure with a typical 〈1 1 1〉+〈1 0 0〉 fiber texture. After torsion deformation, the torque (Γ) as a function of the equivalent strain (ɛeq) showed softening and the microstructure exhibited a gradient across the section so that the inner and outer zones contained sheared-elongated and small-equiaxed subgrains, respectively. It was observed that the equivalent strain to failure for the material processed using powder particles size of less than 45 μm was of about ɛeq ∼ 12, compared to ɛeq ∼ 1 for material processed using powder particles size of less than 25 μm. The microstructural changes during hot torsion deformation of PM 6061 Al alloy should involve continuous dynamic processes.11application/pdfeng© 2012. ElsevierAluminum alloyPowder metallurgyTorsion deformationMicrostructureRecrystallizationresearch articleFísicaMateriales10.1016/j.msea.2012.06.045open access154164Materials science and engineering.A, Structural materials: properties, microstructure and processing555AR/0000010312