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）  

Recrystallization Characterizations of an Al-Zn-Mg-Cu-Zr Alloy during Multi-Pass Hot Rolling Simulation

作　　者：闫亮明[1] 沈健[2] 安迪[1] 杜赵新[1] 张建波 

机构地区：[1]内蒙古工业大学,内蒙古呼和浩特010051 [2]北京有色金属研究总院,北京100088 [3]江西理工大学工程研究院,江西赣州341000

出　　处：《稀有金属材料与工程》2017年第11期3233-3238,共6页Rare Metal Materials and Engineering

基　　金：National Natural Science Foundation of China(51461017);Natural Science Foundation of Inner Mongolia(2011bs0802)

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。This paper investigated the characterizations, using electron back-scattered diffraction（EBSD） and transmission electron microscope（TEM）, of an Al-Zn-Mg-Cu-Zr alloy during multi-pass plain strain compression（PSC） performed to simulate the hot rolling system on Gleeble-l500 D thermo-mechanical simulator. The results show that with increasing of the deformation, there are mainly two dynamic recrystallization mechanisms responsible for the development of new grain, including continuous dynamic recrystallization（CDRX） and geometry dynamic recrystallization（GDRX）. The former is related to original grain boundaries bulging and sub-grain coalescence. The latter can be associated with serious deformation inhomogeneity. Besides, static recrystallization（SRX） happens during inter-pass time. The particles with a size of more than 1 μm also result in the recrystallization.

关 键 词：Al-Zn-Mg-Cu-Zr合金(AA7055) 平面应变压缩 几何动态再结晶 第二相 

分 类 号：TG146.21[一般工业技术—材料科学与工程] TG339[金属学及工艺—金属材料]