7B04铝合金板沿厚度方向显微组织、织构及力学性能的研究
张智慧，左玉婷，刘淑凤【摘要】 本文通过扫描电镜(SEM)及常规力学性能试验对7B04铝合金板沿厚度方向的显微组织、织构及力学性能进行了详细的研究,结果显示:样品芯部及表层晶粒都沿轧制方向拉长,芯部基本未发生再结晶,小角度晶界的含量随着离芯部距离的增加而减少,再结晶程度逐渐加强;未回溶相S(Al2CuMg)、Al7Cu2Fe、Al18Cr2Mg3在芯部及表层尺寸无明显差别;芯部织构主要为铜织构copper{112}〈111〉、黄铜织构Brass{110}〈112〉(B)、S织构{123}〈634〉、{241}〈112〉,{113}〈332〉及{231}〈124〉,表层织构出现旋转立方织构r-cube{100}〈011〉及{111}〈110〉织构,且随芯部到表层织构在基体中的整体体积含量减少。
【Abstract】 The microstructure,texture and tensile property of 7B04 aluminum alloy plate are investigated by Scanning Electron Microscope and tensile tests.The results show that the grain of center layer and surface layer are elongated along rolling direction;The characterization of recrystallization are not obvious.Form center to surface,the content of small angel grain boundary and recrystallization grains increase.There are no difference about the size of undissoved phases Al2CuMg,Al7Cu2Fe,Al18Cr2Mg3 distributing matrix of center layer and surface layer.The center of the plate show typical β fiber texture copper{112}〈111〉,{110}〈112〉(B),S{123}〈634〉 and {241}〈112〉,{113}〈332〉,{231}〈124〉;Near the surface of the plate,r-cube{100}〈011〉,{111}〈110〉 are also abserved,the volume fraction of texture decreased from center to the surface.