Texture and mechanical properties of ultrafine-grained Mg–3Al–1Zn alloy sheets prepared by high-ratio differential speed rolling
2010; Elsevier BV; Volume: 528; Issue: 3 Linguagem: Inglês
10.1016/j.msea.2010.09.007
ISSN1873-4936
AutoresW.J. Kim, H.W. Lee, S.J. Yoo, Y.B. Park,
Tópico(s)Aluminum Alloys Composites Properties
ResumoMechanical properties and textures of the ultrafine grained (UFG) Mg–3Al–1Zn (AZ31) alloy with a mean grain size of 1 μm produced by high-ratio differential speed rolling were investigated. The resulting material exhibited high strength and relatively high ductility at ambient temperature. The high strength was attributed to grain-size and texture strengthening, while the high ductility was attributed to suppression of inhomogeneous twinning and increased strain-rate-sensitivity. The rolling temperature and the amount of shear strain accumulated during HRDSR affected the basal texture intensity and the rotation angle of the basal poles. Bimodal grain-size distribution obtained by annealing the UFG AZ31 at 573 K for a short time period resulted in considerable improvement of uniform elongation.
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