不同温度退火处理后Al-Mg与Al-Mg-Sc合金板材的织构演变  

Texture evolution of Al-Mg and Al-Mg-Sc alloy sheets after annealing at different temperatures

作　　者：姜锋[1] 黄宏锋[1] 赵娟[1] 韦莉莉[1] 

机构地区：[1]中南大学材料科学与工程学院,长沙410083

出　　处：《中国有色金属学报》2010年第12期2283-2290,共8页The Chinese Journal of Nonferrous Metals

基　　金：湖南省自然科学基金资助项目(10JJ2042)

摘　　要：采用X射线衍射反射法在角度(α)为0～75°时测量Al-Mg和Al-Mg-Sc合金板材经不同退火温度处理后的不完整极图,应用三维取向分布函数(ODF)以及晶粒取向汇集目标线(α、β取向线)研究合金冷轧板材中织构的形成及其在退火过程中的演变规律。结果表明:Al-Mg合金冷轧板材中主要存在Brass织构{011}<211>和Copper织构{112}<111>,退火温度升高到300℃时,Al-Mg合金板材的形变织构逐渐消失,Brass织构和Copper织构分别向立方织构{001}<100>以及旋转立方织构{001}<110>转变;添加Sc元素没有改变Al-Mg合金板材冷轧织构组分,但织构极密度和取向密度明显增强;退火温度升高到450℃时,Al-Mg-Sc合金板材的部分Brass织构和Copper织构才向立方织构和旋转立方织构转变,表明Sc的加入使Al-Mg-Sc合金在退火过程的再结晶温度显著提高。The uncompleted pole figures of Al-Mg and Al-Mg-Sc alloy sheets after annealing at different temperatures were measured by X-ray diffractometry at angle （α） from 0° to 75°. The texture compositions and their evolution law were analyzed by the orientation distribution functions（ODF） and the collection of grain orientation （α and β fibre）. The results indicate that the brass {011}211 and copper {112}111 textures are primary in Al-Mg alloy cold-rolled sheets. When the annealing temperature increases to 300 ℃,the deformed textures disappear gradually,the brass and copper textures translate into cube and cube-rotation textures,respectively. Sc element addition can not change the texture compositions of Al-Mg alloy cold-rolled sheets,but it makes the pole and orientation densities increase significantly. For Al-Mg-Sc alloy sheet,the texture translations occur until the annealing temperature rises to 450 ℃,partial brass and copper textures change into the cube and cube-rotation textures,which indicates that Sc element addition would evidently enhance the recrystallization temperature of Al-Mg-Sc alloy in the annealing process.

关 键 词：AL-MG-SC合金 织构 退火 取向分布函数 

分 类 号：TG146.2[一般工业技术—材料科学与工程]