Influences on the formability and mechanical properties of 7000-aluminum alloys in hot and warm forming

被引:18
作者
Behrens, B-A [1 ]
Nuernberger, F. [2 ]
Bonk, C. [1 ]
Huebner, S. [1 ]
Behrens, S. [2 ]
Vogt, H. [1 ]
机构
[1] Leibniz Univ Hannover, Inst Umformtech & Umformmaschinen, Univ 2, D-30823 Hannover, Germany
[2] Leibniz Univ Hannover, Inst Werkstoffkunde, Univ 2, D-30823 Hannover, Germany
来源
36TH IDDRG CONFERENCE - MATERIALS MODELLING AND TESTING FOR SHEET METAL FORMING | 2017年 / 896卷
关键词
DECOMPOSITION PROCESSES; SHEET;
D O I
10.1088/1742-6596/896/1/012004
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Aluminum alloys of the 7000 series possess high lightweight potential due to their high specific tensile strength combined with a good ultimate elongation. For this reason, hot-formed boron-manganese-steel parts can be substituted by these alloys. Therefore, the application of these aluminum alloys for structural car body components is desired to decrease the weight of the body in white and consequently CO2 emissions during vehicle operation. These days, the limited formability at room temperature limits an application in the automobile industry. By increasing the deformation temperature, formability can be improved. In this study, two different approaches to increase the formability of these alloys by means of higher temperatures were investigated. The first approach is a warm forming route to form sheets in T6 temper state with high tensile strength at temperatures between 150 degrees C and 300 degrees C. The second approach is a hot forming route. Here, the material is annealed at solution heat treatment temperature and formed directly after the annealing step. Additionally, a quench step is included in the forming stage. After the forming and quenching step, the sheets have to be artificially aged to achieve the high specific tensile strength. In this study, several parameters in the presented process routes, which influence the formability and the mechanical properties, have been investigated for the aluminum alloys EN AW7022 and EN AW7075.
引用
收藏
页数:8
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