摘要
本文采用 X 射线衍射技术研究了3004铝合金板材在中间退火过程中织构的变化及立方织构的形成规律,并用高压透射电镜原位动态观察、内耗测定和金相方法探讨了退火过程微观组织结构的变化。研究结果表明:中间退火可大量地形成立方织构;热轧工艺及第二相粒子的种类、数量、大小与分布等对退火再结晶织构的生长有显著的影响。此外,由 X 射线织构分析和高压透射电镜动态观察,论证了立方织构形成的机理符合定向形核与定向生长的综合机制的理论。
The change and evolution of texture during hot rolling,cold rolling andintermediate annealing have been observed by X-ray diffraction techniqueand microstructure during annealing has been studied by TEM in situ obser-vation and internal friction method.The results showed that weak“Cu-type”texture and cube texture occur in the hot rolling sample.A strong cubetexture after annealing is formed as a result of recrystallisation.Themicrostructural features have a marked influence on the formed annealingtexture.Based on the experimental results recrystallisation mechanism hasbeen dicussed.
关键词
铝合金
退合
织构
显微构造
再结晶
Aluminum alloy
Intermediate annealing
Texture
Microstructure
Recrystallisation
