RT Journal Article
T1 Microstructure gradient after hot torsion deformation of powder metallurgical 6061 Al alloy
A1 Eddahbi, Mohamed Ou Lahcen
A1 Monge Alcázar, Miguel Ángel
A1 Borrego, A.
A1 González-Doncel, G..
AB The 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.
PB Elsevier
SN 0921-5093
YR 2012
FD 2012-10
LK https://hdl.handle.net/10016/19682
UL https://hdl.handle.net/10016/19682
LA eng
NO Comunidad de Madrid (program TECHNOFUSION-CM , S2009/ENE-1679) , CM/UE: Project MATERA/ESM-1889 y Spanish Ministry of Science and Innovation: Project MAT09-09545.
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RD 3 may. 2024