Static recrystallization behavior of hot-rolled Mg-Zn-Ce magnesium alloy sheet
Static recrystallization behavior of hot-rolled Mg-Zn-Ce magnesium alloy sheet
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DOI：
10.1016/j.jallcom.2017.07.093
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发表时间：
2017-11
影响因子：
6.2
通讯作者：
Xinsheng Huang;Kazutaka Suzuki;Y. Chino
中科院分区：
文献类型：
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作者：
Xinsheng Huang;Kazutaka Suzuki;Y. Chino
采用准原位电子背散射衍射（EBSD）技术研究了Mg-1.5Zn-0.2Ce （wt%）合金在480℃轧制下不同退火阶段的静态再结晶行为。在轧制状态下，与拉伸孪晶和压缩孪晶相比，双孪晶的比例最高。双孪晶主要存在于基向变形晶粒中，静态再结晶晶粒主要在双孪晶与原有晶界的交叉处形核。静态再结晶晶粒倾向于表现出td倾斜取向，并沿双孪晶生长以消耗相邻的基底取向晶粒。这是在退火过程中诱导从rd -劈裂织构向弱化的td -劈裂织构转变的主要原因。残余的td倾斜取向未再结晶晶粒和td倾斜晶粒的生长优势也促进了td劈裂织构的形成。
Static recrystallization behavior of Mg-1.5Zn-0.2Ce (wt%) alloy rolled at 480 °C was investigated at different annealing stages using quasi-in-situ electron backscattered diffraction (EBSD) analyses, which were carried out repeatedly in the same region to trace microstructural evolution. In the as-rolled condition, double twins exhibit the highest fraction compared with tensile and compression twins. Double twins mostly exist in deformed grains with basal orientations, and statically recrystallized grains mainly nucleate at the intersections of double twins and pre-existing grain boundaries. Statically recrystallized grains tend to exhibit TD-tilted orientations and grow along double twins to consume adjacent basal-oriented grains. This is the main reason for inducing the change from a RD-split texture to a well-weakened TD-split texture during annealing. The residual unrecrystallized grains with TD-tilted orientations and the growth advantage of TD-tilted grains also enhance the formation of TD-split texture.