Lehrstuhl für Fertigungstechnologie, Universität Erlangen-Nürnberg

Potential evaluation of the precipitation hardening effects for formability enhancement of hardenable aluminum alloys



Datum: 20.07.2015


Author


Reporter

  • Prof. Dr.-Ing. habil. M. Merklein
  • Prof. Dr.-Ing. habil. K. Willner

The scope of this work was the precipitation hardening of hardenable aluminum alloys of the 6xxx-series and the qualification of its application potential for the forming technology. Based on the design of experiments the key influencing parameters of the heat treatment were identified and their impact on the strength increase of the material was quantified. One focus of the work remained in the methodological development of a process window for adjusting thermally induced hardening effects. In consideration of several influencing parameters with partly inverse effects the process window allows an efficient and reproducible control of the heat treatment procedure. A significant hardening with a high formability of the material was realized at the same time. During the manufacturing of adapted sheet metals, so called Tailor Heat Treated Blanks, with tailored material properties it is consequently possible, to adjust a broader spectrum of the material properties by means of the developed process window and therefore to extend the limit of the forming operation to higher values.