Al-Zn-Mg-Cu系铝合金厚板冷轧过程中的织构演变

Texture Evolution of Al-Zn-Mg-Cu Aluminum Alloy Plate During Cold Rolling

利用电子背散射衍射技术研究了Al-Zn-Mg-Cu系铝合金厚板冷轧过程中不同厚度处的织构演变。结果表明:厚板近表面处的剪切型织构{001}〈110〉,随着冷轧变形量的增加逐渐向轧制型织构Bs,S,Cu组分转变;厚板1/4厚度和中心厚度处的轧制型织构Bs,S,Cu组分,随着冷轧变形量的增加逐渐流向剪切型织构{001}〈110〉。剪切应变是引起轧制型织构向剪切型织构转变的主要原因。在剪切应变作用下Cu取向沿着Ф1=90°流向{001}〈110〉,Bs取向沿着Ф1=35°逐渐向两侧分离,流向{001}〈110〉。

The evolution of through-thickness texture in Al-Zn-Mg-Cu aluminum alloy plate during cold rolling was investigated by using electron backscattered diffraction（EBSD） technique.The results show that shear type texture {001}〈110〉 near the surface of the plate tends to rotate towards a typical rolling texture consisted of Bs,S and Cu components with the reduction,while,at the quarter and the center of thickness,typical rolling texture rotates towards the {001}〈110〉 orientation.Shear strain is the prime reason resulted in the transition from rolling texture to shear type texture.With the shear strain,Cu and Bs orientation rotates towards {001}〈110〉 along Ф1=90° and Ф1=35°,respectively.