|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Solid State Precipitation
||Effects of Clustering and Trace Elements on Precipitation Hardening of Al-Mg-Si Alloys
||Stefan Pogatscher, Marion Werinos, Peter J Uggowitzer
|On-Site Speaker (Planned)
Although Al-Mg-Si alloys are the most frequently used group of precipitation hardened aluminum alloys, early stages of aging are still far from being fully understood. Here we discuss the basic principles of low temperature clustering, its implications on precipitation reactions during artificial aging, and the effect of trace elements and suggest therefrom an improved picture of the underlying mechanisms. Hardness testing, differential scanning calorimetry, atom probe tomography and simulations were used to study clustering at different low temperatures from very short to very long times and subsequent artificial aging for conventional and trace element added alloys. Moreover, it will be shown which physical pre-requisites need to be fulfilled to examine a “diffusion on demand” concept to modify clustering and precipitation kinetics in Al-Mg-Si alloys by orders of magnitude via trace elements.
||Planned: Supplemental Proceedings volume