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Influence Of Texture On Roping Development In Al-mg-si Alloy Sheet

机译:织构对Al-mg-si合金薄板发展的影响

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摘要

One of the most important characteristics, which is necessary to automotive bodies, is the appearance quality especially for the outer panels. Roping is a kind of surface defect which decreases the appearance quality. In the present study, the influence of the texture on the roping behavior and its in-plane anisotropy were investigated. Two kinds of aluminum sheets, which show the different roping development, were prepared by changing the thermomechanical processings. A strong Cube texture was measured in the sample with less roping before the tensile deformation. On the other hand, the mixed texture of Cube and Goss components was measured in the sample with a significant roping especially in the center of the thickness. In the sample with a significant roping, the bands of Goss component parallel to the rolling direction were observed by EBSD mapping. In both samples, roping became the most significant by stretching in the 45 degree direction to the rolling direction compared with the 0 degree direction or 90 degree direction. It was confirmed that the orientation density of Cube component was reduced by stretching in the 45 degree direction to the rolling direction, while the orientation density of Goss component was reduced by stretching perpendicular to the rolling direction. It was considered that the in-plane anisotropy of the roping development was caused by the difference in the texture component which could rotate according to the tensile direction.
机译:汽车车身所必需的最重要的特性之一是外观质量,尤其是外板的外观质量。缠绕是一种会降低外观质量的表面缺陷。在本研究中,研究了织构对绳状行为及其面内各向异性的影响。通过改变热机械加工过程,制备了两种铝板,它们表现出不同的绕线发展。在拉伸变形之前,样品中的结块较少,因此测量到了很强的立方纹理。另一方面,在样品中测量了立方和高斯组分的混合织构,并具有明显的麻纹,尤其是在厚度中心。在具有明显起皱的样品中,通过EBSD映射观察到了平行于轧制方向的高斯分量带。在两个样品中,与0度方向或90度方向相比,通过在相对于轧制方向的45度方向上拉伸,缠结变得最显着。证实了通过在与轧制方向成45度方向上拉伸而降低了立方体组分的取向密度,而通过与轧制方向垂直地拉伸而降低了戈斯组分的取向密度。可以认为,成绳展开的面内各向异性是由可以根据拉伸方向旋转的织构成分的差异引起的。

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