|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Integrative Materials Design III: Performance and Sustainability
||Improved Formability of Aluminium Alloys at Low Temperatures for Automotive Application
||Belinda Gruber, Florian Grabner, Thomas Kremmer, Stefan Kirnstötter, Robert Schneider, Robin Schäublin, Peter J. Uggowitzer, Stefan Pogatscher
|On-Site Speaker (Planned)
The automotive industry is increasingly using aluminium alloys in order to reduce the total car weight and thus, decreasing CO<SUB>2</SUB> emissions. Hence, for the production of complex lightweight outer panels an improved deep-drawability and simultaneously high strength levels of aluminium alloys are required. Here we illustrate the forming behavior of different AlMg(Mn)- and AlMgSi(Cu)- alloys at room temperature and cryogenic temperatures. The results show an increase in uniform elongation, accompanied by a unique strain hardening rate and the suppression of Portevin-Le Chatelier (PLC) band formation at low temperatures. Microstructural characterization was performed by scanning electron microscopy (SEM) and electron backscatter diffraction (EBSD). In addition, the dislocation arrangement was analysed by cryogenic in-situ transmission electron microscopy (TEM) straining experiments. This method offers the possibility to study the dislocation behavior directly at low temperatures without intermediate heating to room temperature.
||Planned: Supplemental Proceedings volume