锻压技术

7050铝合金板材的各向异性研究

英文标题：Research on anisotropy for 7050 aluminum alloy sheet

作者：任平平1 胡会娥2

分类号：TG146.21

出版年,卷(期):页码：2021,46(9):163-168

摘要：

铝合金冷成形过程中的各向异性影响了后续焊接时的装配间隙，进一步影响了焊接质量。针对此问题，通过单晶分析法研究了7050铝合金板材冷变形时的厚向各向异性和面内各向异性。研究结果表明，沿轧制方向拉伸时，宽度方向的变形能力小于厚度方向的变形能力；当拉伸方向为宽度方向时，轧制方向和厚度方向的变形能力基本相同；变形方向对7050铝合金板材各力学性能的面内各向异性影响不大。7050铝合金板材塑性变形时存在的各向异性主要是由生产过程中形成的Brass {110}<112>织构所致。当铝合金中主要含Brass {110}<112>织构时，可通过控制轧板的下料部位，使其后续主要沿宽度方向受力变形，以减少塑性成形过程中的各向异性和提高焊接质量。

The anisotropy in the cold forming process of aluminum alloy affects the assembly gap during subsequent welding and further affects the welding quality. Therefore, for this problem, the thickness anisotropy and in-plane anisotropy of 7050 aluminum alloy sheet during cold deformation were studied by single crystal analysis method. The results show that when 7050 aluminum alloy sheet is stretched along the rolling direction, the deformation ability in width direction is less than that in thickness direction, and when stretching along the width direction, the deformation ability in the rolling direction and the thickness direction is basically the same. In addition, the deformation direction has little effect on the in-plane anisotropy of the mechanical properties for 7050 aluminum alloy. However, the anisotropy of 7050 aluminum alloy sheet during plastic deformation is mainly due to brass {110}<112> texture formed during the production process. When brass {110} <112> texture is mainly contained in aluminum alloy, the blanking part of the rolled sheet is controlled to make the subsequent deformation mainly in the width direction to reduce the anisotropy in the plasticity forming process and improve the welding quality.

基金项目：

国家自然科学基金资助项目（NSFC51105373）

任平平（1977-），女，硕士，二级调研员 E-mail：82351118@qq.com 通信作者：胡会娥（1976-），女，博士，教授 E-mail：huhuie@163.com

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