Orientation dependent recovery in strongly deformed Al-0.1%Mn crystals

Abstract : Single crystals of Al-0.1%Mn have been channel-die compressed to a true strain of 2.3 and their recovery behaviour at 240-320 degrees C investigated by microhardness measurements, EBSD microtexture mapping and X-ray line broadening analysis. The crystal orientations are the nominally stable Goss {110}< 001 >, brass {110}< 112 > and S {123}< 634 >. For all three orientations the microhardness decreases with a logarithmic time dependency but the instantaneous recovery rates of the Brass oriented crystals are systematically lower than those of the other two orientations by a factor of about 2. The dislocation densities decrease rapidly in the first stages of recovery (<1 min) by dislocation dipole annihilation and more slowly thereafter. In the Goss and S orientations the later stage of recovery is due to sub-grain growth. The orientation dependency is ascribed to the relatively low misorientations developed by plastic straining in the Brass crystals (average about 4 degrees) compared with the Goss and S orientations (about 7-8 degrees).
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RECRYSTALLIZATION AND GRAIN GROWTH V Book Series: Materials Science Forum, 2013, 753, pp.225-230. 〈10.4028/www.scientific.net/MSF.753.225〉
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https://hal-emse.ccsd.cnrs.fr/emse-00963721
Contributeur : Géraldine Fournier-Moulin <>
Soumis le : vendredi 21 mars 2014 - 17:33:33
Dernière modification le : mercredi 29 novembre 2017 - 10:07:16

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Adeline Albou, Andras Borbely, Claire Maurice, J.H. Driver. Orientation dependent recovery in strongly deformed Al-0.1%Mn crystals. RECRYSTALLIZATION AND GRAIN GROWTH V Book Series: Materials Science Forum, 2013, 753, pp.225-230. 〈10.4028/www.scientific.net/MSF.753.225〉. 〈emse-00963721〉

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