Effect of Si Content on Dynamic Recrystallization of Al-Si-Mg Alloys During Hot Extrusion
Effect of Si Content on Dynamic Recrystallization of Al-Si-Mg Alloys During Hot Extrusion
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DOI：
10.1016/j.jmst.2014.07.011
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发表时间：
2014-12-01
影响因子：
10.9
通讯作者：
Zhou, Kexin
中科院分区：
文献类型：
--
作者：
Wu, Yuna;Liao, Hengcheng;Zhou, Kexin
利用电子背散射衍射（EBSD）和透射电子显微镜（TEM）研究了Si含量对三种挤压态Al-Si-Mg合金显微组织特征的影响。结果表明，粗大Si颗粒的密度对动态再结晶起着关键作用。 Si含量较低的硅合金很少发生动态再结晶；然而，这种现象发生在中等硅含量的S2合金的富硅区。在高Si含量的S3合金中观察到了成熟的再结晶。尽管变形是在高温下进行的，但在富硅区发生了颗粒激发动态再结晶。
By using electron backscatter diffraction (EBSD) and transmission electron microscopy (TEM), the effect of Si content on microstructure characteristics of three as-extruded Al-Si-Mg alloys was investigated. Results showed that the density of coarse Si particles played a critical role in dynamic recrystallization. Dynamic recrystallization rarely occurred in Si alloy with less Si content; however, it happened in the Si-rich zones in S2 alloy with a medium Si content. And a mature recrystallization was observed in S3 alloy with high Si content. Although deformation was carried out at high temperature, particle-stimulated dynamic recrystallization occurred in Si-rich zones.