Fun explorations in the design space of refractory high-entropy alloys

Departments: Mechanical Engineering and Materials Science
Time: Wednesday, October 27, 2021 - 2:30pm - 3:30pm
Type: Seminar Series
Presenter: Cem Tasan, MIT
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Mechanical Engineering and Materials Science Seminar Series

Seminars are held weekly on Wednesday at 2:30 PM. Please contact Diana Qiu, Amir Pahlavan, or Rebecca Kramer-Bottiglio with speaker suggestions.

October 27, 2021

"Fun explorations in the design space of refractory high-entropy alloys"
Cem Tasan
MIT

Abstract: Refractory high-entropy alloys (RHEAs) are typically limited by significant brittleness at ambient temperatures, requiring extensive thermo-mechanical processing. In this talk, investigations of the Ti-V-Nb-Hf-Al RHEA family will be presented, which can exhibit promising property combinations at room temperature, even in the as-cast state, without any thermo-mechanical treatment. Based on multi-scale characterization of the microstructure evolution in these alloys, we will discuss the underlying deformation mechanisms responsible of the resulting mechanical behavior.

Short Bio: Prof. C. Cem Tasan is an Associate Professor of Metallurgy in the Dept. of Materials Science and Engineering at MIT. He received his BSc and MSc degrees from the Metallurgical and Materials Engineering Dept. of METU, Ankara/Turkey. He then moved to the Netherlands, to carry out his PhD within the group of Prof. Marc Geers in the Mechanical Engineering Dept. of Eindhoven University of Technology. Following his post-doc research at the Max-Planck Institut fur Eisenforschung (MPIE) in Germany, he was appointed there as a Group Leader, leading the Adaptive Structural Materials group until joining MIT in January 2016. Prof. Tasan's research explores the boundaries of physical metallurgy, solid mechanics, and in-situ microscopy, in order to provide metals solutions to engineering challenges.