A comparison between DCCAE and conventional extrusion of Mg-9.5Li-3Al-1.6Y alloy

作者：Liu Junwei; Peng Xiaodong^*; Wang Bao; Wei Guobing; Xie Weidong; Yang Yan; Liu Mingpu

来源：Journal of Rare Earths, 2016, 34(6): 626-631.

DOI：10.1016/S1002-0721(16)60071-6

• DCCAE
• dual-phase
• Mg-Li alloy
• Al2Y
• fine-grained
• rare earths

Double change channel angular extrusion (DCCAE) was performed in dual-phase Mg-9.5Li-3Al-1.6Y (wt.%) alloy to develop fine-grained microstructures. The microstructure evolution during DCCAE and conventional extrusion (CE) was investigated. The microstructure of the extruded dual-phase Mg-Li alloy consisted of recrystallized beta-Li grains, banded alpha-Mg phases, and Al2Y phases distributed in beta-Li phases and phase-interface uniformly. Compared with CE, the specimens after DCCAE had smaller beta-Li grain size (3-5 mu m by the DCCAE and 6-10 mu m by the CE) and the a-Mg phases were refined during the DCCAE. The distribution of the Al2Y phases was improved a lot by DCCAE. Furthermore, the specimens after DCCAE had better tensile strength than conventional extrusion ones.

• 出版日期2016-6
• 单位重庆大学