通过拉伸试验、电子背散射衍射(EBSD)和透射电子显微镜(TEM)等检测手段,研究了在冷轧前分别进行固溶处理和过时效处理工艺对6016-T4P板材组织和力学性能的影响.结果表明:冷轧前进行固溶处理的6016-T4P板材比冷轧前进行过时效处理的6016-T4P板材塑性、强度和平面各向异性指数更高,晶粒度更小,晶界分布更均匀;而冷轧前进行过时效处理会弱化6016-T4P板材的再结晶织构强度并改变再结晶织构类型,进而改变板材平面内不同方向上的屈服强度并减小平面各向异性指数.
The effects of solution and over-aging treatments before cold rolling on the mechanical properties and microstructure of 6016-T4P aluminum alloy sheet were investigated by tensile testing,electron back scattered diffraction and transmission electron microscope The results showed that the sheet prepared by solution treatment before cold rolling had higher ductility,strength and planar anisotropy,finer grain size and more homogeneous low angle grain boundaries distribution compared with the sheet prepared by over-aging treatment before cold rolling.In addition,over-aging treatment before cold rolling could weaken the intensity of recrystallization texture and change the type of recrystallization texture of 6016-T4P sheet,leading to the change of yield strength in different directions and the decrease of plane anisotropy.
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