Mittels einer Vorkonditionierung in den W-Temper- (W-) oder weichgeglühten (O-) Zustand kann die Umformbarkeit der hochfesten Aluminiumlegierungen EN AW-6082 und -7075 signifikant gesteigert werden. Die so realisierbare Kaltumformung sorgt vor allem bei mehrstufigen Anwendungen für eine vereinfachte Prozessführung gegenüber temperaturunterstützten Prozessrouten, führt jedoch zu ausgeprägten Verfestigungseffekten. Deren Klassifizierung und Quantifizierung sind Inhalt dieses Beitrags.
By means of preconditioning to the W-temper- (W-) or soft-annealed (O-) state, the formability of the high-strength aluminium alloys EN AW-6082 and -7075 can be increased significantly. These preconditioned alloys enable cold forming, which ensures simplified process control compared to temperature-supported process routes, especially in multi-stage applications. In return, this leads to pronounced strain-hardening effects. Their classification and quantification are the subject of this article.
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