预先热处理对6111铝合金冷轧及再结晶织构的影响

Effect of pre-heat treatments on cold rolling and recrystallization textures in Al alloy 6111

采用取向分布函数(ODF)法研究了预先热处理对6111铝合金的冷轧和再结晶织构组态的影响。结果表明:预先热处理因改变基体的成分和第二相的析出状态而显著影响6111铝合金的形变织构和再结晶织构;热轧板不经预处理而直接冷轧,其再结晶织构主要由绕法向旋转了15°的立方取向(Cube+ND15)和{011}〈111〉取向构成;冷轧前进行过时效处理,其再结晶织构主要由绕法向旋转了20°的立方取向(Cube+ND20)和{011}〈122〉取向构成;冷轧前进行固溶处理会显著提高冷轧织构中Brass和Goss组分的取向密度,再结晶织构明显弱化,而且Cube+ND20组分绕法方向(ND)产生很大的漫散,接近于{001}〈UVW〉纤维织构。

The effects of pre-heat treatment on rolling and recrystallization textures were investigated by means of orientation distribute functions （ODFs）. The results show that the pre-heat treatments have significant effects on both rolling texture and recrystallization texture. The recrystallization texture of sample hot rolled and then cold rolled consists of cube orientation rotated by 15°round normal direction （ND） and {011}〈111〉 orientation. The recrystallization textures consist of cube orientation rotated by 20°round normal direction （ND） and {011}〈122〉 orientation for samples overaged and then cold rolled. The orientation intensities of Brass and Goss components of cold rolling texture are raised remarkably for samples solution-treated, and the orientation intensity of the rotated cube orientation of recrystallization texture is obviously lowered. The rotated cube orientation is scattered round normal direction, closing to {001}〈UVW〉 fibre texture.