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 Karl Franzens University Graz

Graz University of Technology 

Designing Metastable Phases for High Performance Applications
Prof. Dr. Jürgen Eckert
Erich Schmid Institute of Materials Science, Austrian Academy of Sciences (ÖAW) and Department Materials Physics, Montanuniversität Leoben
17:15 - 18:15 Tuesday 24 May 2016 TUG P2

Metallic materials are important in a variety of high performance applications. However, a drawback of nearly all current high strength alloys is that they lack ductility or, on the opposite side, they may be highly ductile but lack strength. Hence, it is mandatory to develop new routes for creation of tailored materials enabling property as well as function optimization. One possibility along these lines is the design of monolithic amorphous materials or bulk micro-, ultrafine- or nano-structured composite structures with intrinsic length-scale modulation and phase transformation under highly non-equilibrium conditions.
This talk will present recent results obtained for metallic glass-based hybrid structures with transformation effects at different length-scales and microcrystalline-grained structures based on elastic instabilities and modulated length-scale. The deformation behaviour and possible phase transitions during deformation will be related to the intrinsic properties of the phases and their microstructure including heterogeneities and length-scale modulation in order to derive guidelines for the design of macroscopically ductile high-strength materials. Finally, the results will be critically assessed from the viewpoint of possible scaling-up for technological applications and the use of simple and cost effective processing technologies.