Heat Treatment Selection and Forming Strategies for 6082 Aluminum Alloy
Heat Treatment Selection and Forming Strategies for 6082 Aluminum Alloy
复制标题
6082铝合金的热处理选择及成形策略
DOI：
10.1115/1.3120384
复制
发表时间：
2009
影响因子：
1.2
通讯作者：
C. García
中科院分区：
文献类型：
--
作者：
A. Aginagalde;X. Gómez;L. Galdos;C. García
铝6XXX合金显示出高的强度重量比，因此是当今运输行业轻质结构努力的有前途的材料。当同时考虑变形和最终机械性能时，从顺应性的角度来看，高延展性是令人感兴趣的。另一方面，在汽车结构部件中需要高电阻（其可通过T6沉淀热处理获得），但导致延展性降低。为了提高铝合金的成形性能，通常采用温成形。与此相反，本文显示了6082 T6合金的拉伸变形行为如何不受温度的影响。在这项工作中，通过在O退火条件下使材料变形，实现了获得零件所需的可成形性值。但这种策略侧重于可成形性;因此，最终的机械性能无法达到必要的强度要求。作为解决方案，研究了在形成零件后（在退火条件下）应用T6热处理的可能性。从变形实验部件获得的热处理后试样的拉伸表征导致高流动应力水平，因此该策略得到验证。然而，热处理会导致最终零件的几何变形，因此，应在成形过程中添加最后的校准步骤，以获得所需的形状。
Aluminum 6XXX alloys show high strength to weight ratios and are thus promising materials for today’s transport industry lightweight construction efforts. When considering both deformation and final mechanical properties, high ductility is interesting from the conformability point of view. On the other hand, high resistance is necessary in the automotive structural parts (which can be obtained through T6 precipitation heat treatment) but leads to reduced ductility. In order to increase aluminum alloys’ formability, warm forming is commonly applied. In contradiction to this, this article shows how the tensile deformation behavior of the 6082 T6 alloy is not affected by the temperature. In this work, the necessary formability values to obtain the parts are achieved, deforming the material under O annealed condition. But this strategy is focused on the formability perspective; therefore, the final mechanical properties do not achieve the necessary strength requirements. As a solution, the possibility of applying the T6 heat treatment after forming the parts (in annealed condition) is studied. A tensile characterization of the post-heat-treated specimens obtained from the deformed experimental part results in high flow stress levels, and thus, the strategy is validated. Nevertheless, the heat treatment leads to geometrical distortions in the final part, and thus, a last calibration step should be added to the forming process in order to obtain the desired shape.