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Jintong Chen,Rui Sun,Guisheng Li,Ming Fang,Gaoshan Xu,Mingya Zhang,Jinghui Li 대한금속·재료학회 2022 METALS AND MATERIALS International Vol.28 No.11
The influence of changes in temperature from 250 to 400 °C with 50 °C intervals during ECAP processing on the textureevolution and recrystallization behavior for Mg–9Al–1Zn alloy was studied. The results demonstrate that {10 1 2} extensiontwins and dislocation slip are the dominating deformation modes in low temperature (250 °C and 300 °C) ECAP processing,and those twins gradually disappear with increasing temperature. Most of the recrystallized grains are observed to exhibit(0001) poles 70°–90° away from the normal direction due to reorientation of the grains caused by twins and dislocationslips, with the texture changing from a strong basal texture to the texture component close to { 1 2 1 0} and {01 1 0}. Theproduction of ultrafine recrystallized grains in the specimens treated by ECAP at 400 °C was aided by grain fragmentationcaused by twins interaction, as well as dislocation slip and temperature increase during severe plastic deformation (SPD).