冷轧工业纯钛的退火再结晶行为

采用扫描电镜(SEM)，电子背散射衍射(EBSD)，取向分布函数(ODF)等测试手段和分析方法，比较系统地研究了工业纯钛的退火再结晶行为。结果表明：初次再结晶大致分为2个阶段：第1阶段为500 ℃退火的前60 min左右，约25%的材料发生了取向变化的再结晶；第2阶段为退火60~360 min，材料体积的大部分（约75%）发生了没有取向改变的再结晶。晶粒长大过程的前期，织构变化非常显著。随着晶粒的长大和退火时间的延长，织构变化越来越缓慢。增强的取向主要位于{0°，30°，30°}为中心的宽峰区域，减弱的取向主要是{0°，40°，50°}附近的取向

Annealing Heat Treatment Behavior in CP-Ti

The annealing heat treatment of commercial-purity titanium (CP-Ti) was investigated by scanning electron microcopy (SEM), electron backscatter diffraction (EBSD) technique and orientation distribution function (ODF). It is concluded that two stages can be depicted during the primary recrystallization. The first stage is completed at 500 °C in about 60 min, when about 25% of the material recrystallizes with an orientation change. The second stage is completed from 60 to 360 min, when a large part of the material (about 75% of the material) recrystallizes without any orientation change, suggesting in situ recrystallization. The changes in texture are more pronounced at the beginning of the grain growth process. Over long-term heat treatments, the texture evolves much more slowly. The wide peak area centered by {0°, 30°, 30°} is enhanced, while the orientation near {0°, 40°, 50°} is decreased.