|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Friction Stir Welding and Processing IX
||Friction Stir Welding Parameter Development of AA7075 for Hot Stamping Applications
||Francois Nadeau, Nia Harrison
|On-Site Speaker (Planned)
In order to compete with advanced high strength steels in structural parts, automotive manufacturers are looking to introduce high strength aluminum alloys like AA7075 which have high peak-aged mechanical properties. Formability of these high strength aluminum alloys is possible through hot stamping. A further weight reduction of an aluminum blank is possible using tailor welded blank (TWB) sections throughout the B-pillar which can lead to weight reductions between 10-12%. Friction stir welding, as a solid-state welding process, has already been proven suitable without hot cracking issues for welding AA7075 aluminum alloy. However, abnormal grain growth (AGG) issues arise when post-weld operations at high temperature are required such as solution heat treatment or hot stamping operations. This paper relates the development of friction stir welding procedures and process parameters which will be adapted to hot stamping to join effectively AA7075-T6 tailor welded blanks.
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