以大变形高纯铝在300 ℃的退火试样为例, 提出了一种基于EBSD数据中q值计算再结晶分数的改进方法, 该方法通过分离不同取向的q值数据, 对于不同的取向数据分别采用Tarasiuk提出的q值积分算法计算再结晶分数, 即与完全再结晶状态及变形态的q值数据进行对比并积分计算, 再按各取向的再结晶分量权重求和得出总体的再结晶分数。结果表明: 改进的q值积分算法可以避免原q值算法中q值与取向的依赖性所带来的误差, 因而可得到较为准确的结果。

An improved method to estimate recrystallization fraction of material was put forward based on (electron backscattering diffraction) EBSD pattern q index with large deformation high purity aluminum sample which had been annealed at 300 ℃ as example. First extracting q index data according to crystallographic orientation and calculating the separated recrystallization fraction by q index integration method supposed by Tarasiuk, i. e. to compare the q index distribution of sample in full-recrystallization condition and as-deformed condition, and then the sum of each orientation recrystallization fraction considering coefficient which was each orientation grains fraction was the final result. The results show that the improved method can avoid errors carried by the dependence of q index on crystallographic orientation for the original q index integration method, so it can gain more accuracy results.