Vol.27 No.2 孟利等：镁合金AZ31动态再结晶行为的取向成像分析 ·191 RD (0002} TD (a1)取向成像 b1)动态再结品区域 (cl)两类区域的取向 应变0.25 RD (00021 25 um Mapl:Step=1 m:Gnd140x120 =25 gm:Map3:Step-1 um:Gnd1 40x120 (a2)取向成像 b2)动态再结品区域 (c2)两类区域的取向 应变0.60 RD {0002) TD (a3)取向成像 63)动态再结晶区城 (c3)两类区域的取向 应变0.80 图5应变量对XY试样两类晶粒取向变化的影响，340℃ Fig.5 Influence of strain on the orientation evolvement of two sorts of grains in sample Xy.340C 40 R8 XZ试样，340℃，应变量0.25 9-ZY试样 一▲-订试样 平均值36.6 36 37.2 60 43) 32 部 28 15 02 0.4 0.6 0.8 1.0 10 20 30 40 真应变E 测试相邻两品粒的组数 图6三个试样两类晶粒间的取向差 图7XZ试样两类晶粒间取向差分布 Fig.6 Misorientation between two sorts of grains of three samples Fig.7 Distribution of misorientation between two sorts of grains of sample Z