|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||In-situ Methods for Unraveling Structure-Property Relationships in Light Metals
||In-situ Real-time Monitoring of Aging Processes in an Aluminum Alloy by High-precision Dilatometry
||Martin Luckabauer, Elisabeth Hengge, Gregor Klinser, Wolfgang Sprengel, Roland Würschum
|On-Site Speaker (Planned)
Hardening of industrial aluminum alloys mostly occurs due to highly complex precipitation processes. Characterization of often metastable precipitates/phases can be well performed, e.g., by advanced microscopic techniques, however, accessing the kinetics of the precipitation process is in general more demanding. As formation, transformation or dissolution of phases are mostly accompanied by volume changes dilatometric techniques are highly feasible. Only here most commercially available dilatometric devices lack the resolution ΔL/L < 10<SUP>-5</SUP> and long-term stability up to t = 10<SUP>6</SUP>s. We present <I>in-situ</I> isothermal, high-precision length-change measurements during artificial aging of a commercial aluminum alloy (AW6060) at different temperatures. Measurements were performed with a laser-dilatometer of which major parts are self-designed giving now access to the required resolution and stability regimes. The results support the precipitation sequence proposed for Al-Mg-Si alloys clearly showing the transitions between the different steps towards the stable Mg<SUB>2</SUB>Si phase. Supported by Austrian Science Fund (FWF): P25628-N20.