2E12铝合金在冷轧和退火过程中织构和显微组织的演变  

Evolution of texture and microstructure of 2E12 aluminum alloy during cold rolling and annealing

作　　者：汪波[1] 易丹青[1,2] 陈宇强[1] 王斌[1,2] 李泽英[1] 

机构地区：[1]中南大学材料科学与工程学院,长沙410083 [2]中南大学有色金属材料科学与工程教育部重点实验室,长沙410083

出　　处：《中国有色金属学报》2013年第11期3064-3074,共11页The Chinese Journal of Nonferrous Metals

基　　金：国家重点基础研究发展规划资助项目(2005CB623705)

摘　　要：采用取向分布函数(ODF)和背散射电子衍射技术(EBSD)研究冷轧和退火对2E12铝合金织构的影响,并采用透射电镜(TEM)分析亚结构在冷轧与退火过程的演变规律。结果表明:2E12合金热轧板在冷变形过程中,随着冷轧变形量从40%增加到80%,黄铜织构(Brass){011}?211?和S型织构{123}?634?逐渐增多,立方织构(Cube){001}?100?明显减少。在退火过程中残留的立方取向亚晶通过晶界迁移吞噬周围的S取向亚晶而优先长大。在470℃退火0.5h后,立方织构(Cube){001}?100?成为主要取向,其体积分数为36%。在相同的退火工艺条件下,随着冷变形量的增加,退火后2E12合金的立方织构体积分数增大。The effects of cold rolling and annealing on textures of 2E12 aluminum alloy were investigated by means of orientation distribution function （ODF） and electron backscattered diffraction （EBSD）. In addition, the evolution of substructure during cold rolling and annealing was analyzed by TEM. The results show that, with the increase of the deformation from 40% to 80%, main conclusions are presented as follow： Brass texture{011}？112？ and S texture{123}？634？increase during the cold rolling, while cube texture{001}？100？significantly reduces. In the annealing process, the residual cube sub-grains devour surrounding sub-grains of S orientation through the grain boundary migration and preferentially grow up. The cubic texture becomes major orientation and its volume fraction is 36%at 470℃for 0.5 h. Under the same annealing process conditions, the volume fraction of recrystallization texture in the annealing alloy increases with the increase of the deformation.

关 键 词：2E12铝合金 冷轧 退火 织构 亚结构 

分 类 号：TG146.2[一般工业技术—材料科学与工程]