Materials Degradation under Corrosion and Radiation: from First Principles to Alloy Design

19th. Mar. 2020, Seminar, Ruhr-Universität Bochum, IC 03/610

Start: 19th. Mar. 2020. 02:30 p.m.
End: 19th. Mar. 2020. 03:30 p.m.

Prof Adrien Couet Engineering Physics, University of Wisconsin, USA

Prof Alfred Ludwig Ruhr-Universität Bochum

Materials degradations under extreme environments such as radiation fields and/or high-temperature corrosive electrolytes are currently preventing the fast deployment of efficient and clean sources of energy including thermal energy storage, concentrated solar power and advanced nuclear technologies. In this presentation, the fundamentals of corrosion in high-temperature environments will be introduced with two important examples for the applications described above: (i) zirconium alloy nuclear fuel cladding oxidation and (ii) structural materials corrosion in molten salts. A set of state-of-the-art corrosion tests as well as a suite of characterization methods, including (S)TEM, APT, in-situ electrochemistry and synchrotron micro-XANES have been used to understand the fundamentals of corrosion in these systems. The coupled effects of irradiation on corrosion has also been studied in using a mix of ion-beam irradiation experiments and point defect models. Finally, recognizing that applying a multiscale bottom-to-top alloy design approach is challenging in these extreme environments, high-throughput processing, testing and characterization methods are being developed to explore alloy compositional field response to corrosion and irradiation at an unprecedented pace.

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