About this Abstract |
Meeting |
2022 TMS Annual Meeting & Exhibition
|
Symposium
|
Aluminum Alloys, Processing and Characterization
|
Presentation Title |
Precipitation Hardening in Innovative Processing of 6xxx Aluminum Alloys |
Author(s) |
Alexander Wimmer, Annika Haemmerle, Calin D Marioara |
On-Site Speaker (Planned) |
Annika Haemmerle |
Abstract Scope |
From literature, four hardening mechanisms are well known: solid solution hardening, precipitation/dispersion hardening, grain boundary hardening and work hardening. In this study an additional hardening mechanism, cluster harden-ing, was observed. Based on TEM images and strength calculations it has been shown, that contributions from the four “classical” hardening mechanisms are not sufficient to describe the experimental observed strength. This new hardening mechanism and the interaction with work hardening has been analyzed in a large-scale, optimized T8 process, which far exceeds the strength properties of the classical T6 condition. Moreover, the effect of trace elements on precipitation kinetics was studied. Both the effects of wanted trace elements (micro-alloying) and unwanted trace elements (secondary aluminum) were examined. |
Proceedings Inclusion? |
Planned: Light Metals |
Keywords |
Aluminum, Characterization, Mechanical Properties |