工业纯铝极薄带异步轧制过程中的织构演变

Texture evolution of commercial pure aluminum ultra-thin strip during asymmetrical rolling

采用异步轧制工艺制备出工业纯铝极薄带,并利用X射线衍射仪(XRD)和透射电子显微镜(TEM)对其织构演变和微观组织进行分析。结果表明,随着变形程度的增加,工业纯铝的晶粒主要向β取向线聚集,形变织构中铜型织构(C){112}〈111〉和黄铜型织构(B){011}〈211〉逐渐增强,轧至100μm厚时试样中晶体取向密度达到最大值26,轧至30μm厚时其取向密度值下降至16,并逐渐形成旋转立方织构(RC){100}〈011〉;形变储能剧烈增加诱发工业纯铝在室温下发生再结晶过程,使系统能量降低,导致织构强度下降。

Texture evolution and microstructure of commercial pure aluminum ultra-thin strip produced by asymmetrical rolling were investigated by X-ray diffractmeter and transmission electron microscope. It was found that, with increasing deformation, most crystallites aggregate along β orientation line, copper texture C- { 112 } （ 111 ） and brass texture B- { 011 } （ 211 ） in deformation textures increase gradually, the orientation intensity value reaches 26, the maximum, when ultra-thin strip is rolled to 100μm, but decreases significantly to 16 at 30 μm, and the texture mainly consists of rotation cubic texture RC-{ 100 } （011）. This decrease is partially caused by recrystallization due to significant increase in deformation stored energy at room temperature, and the system energy is reduced by recrystallization.