多道次热轧模拟过程中Al-Zn-Mg-Cu-Zr合金的再结晶特征（英文）

发布时间：2018-04-16 00:18

  本文选题：Al-Zn-Mg-Cu-Zr合金(AA) + 平面应变压缩　； 参考：《稀有金属材料与工程》2017年11期

【摘要】：采用Gleeble-1500D热模拟试验机根据设计的轧制工艺对7055合金进行多道次热压缩试验,模拟其企业热轧过程,采用电子背散射衍射和透射电镜研究了再结晶特征。在不同变形条件下,表现出不同的再结晶机制,主要动态再结晶机制有连续动态再结晶和几何动态再结晶。前者的形核机制主要为原始晶界弓出形核和亚晶合并形核;后者归因于严重的不均匀变形。在道次间的间隙期间,静态再结晶发生。另外,尺寸大于1μm的第二相也促进再结晶。
[Abstract]:The multi-pass hot compression test of 7055 alloy was carried out by Gleeble-1500D thermal simulation machine according to the designed rolling technology. The hot rolling process of 7055 alloy was simulated. The recrystallization characteristics were studied by electron backscattering diffraction and transmission electron microscope.Under different deformation conditions, different recrystallization mechanisms were observed. The main dynamic recrystallization mechanisms were continuous dynamic recrystallization and geometric dynamic recrystallization.The nucleation mechanism of the former is mainly the primary grain boundary arcuate nucleation and the subcrystalline amalgamation nucleation, while the latter is attributed to serious inhomogeneous deformation.Static recrystallization occurs during the interpass gap.In addition, the second phase larger than 1 渭 m also promotes recrystallization.
【作者单位】： 内蒙古工业大学;北京有色金属研究总院;江西理工大学工程研究院;
【基金】：National Natural Science Foundation of China(51461017) Natural Science Foundation of Inner Mongolia(2011bs0802)
【分类号】：TG146.21;TG339
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本文编号：1756459