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Anti-aging treatment of nuclear power plant steel

Zhao, Yan; He, Binyan; Saillet, Sébastien; Domain, Christophe; Le Delliou, Patrick; Perez, Michel and Qin, Rongshan (2018). Anti-aging treatment of nuclear power plant steel. Materials Science and Engineering: A, 735 pp. 73–80.

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Duplex stainless steel loses impact toughness quickly during its service at nuclear power plant station as pipe and boiler. Aging induced spinodal decomposition in ferrite phase is the mechanism behind this degradation. This work uses electropulsing to treat the aged steel at the service temperature. The charpy impact toughness and Vickers micro-hardness were recovered significantly. Thermoelectric power is recommended to measure the degree of spinodal decomposition in the aging processing, which was recovered by >83% by the electropulsing treatment. It was proved that the anti-aging treatment has nothing to do with the Ohm heating. Instead, the electropulsing-induced extra free energy change of -891 J/mol provided thermodynamic driving force for the regeneration processing. Electropulsing-enhanced diffusivity enables the anti-aging processing to be completed quickly.

Item Type: Journal Item
Copyright Holders: 2018 Elsevier
ISSN: 0921-5093
Project Funding Details:
Funded Project NameProject IDFunding Body
Toward the Regeneration of Aged Stainless SteelsCLS-511-30EDF Energy
Keywords: Duplex stainless steel; Aging; Charpy impact test; External electric field
Academic Unit/School: Faculty of Science, Technology, Engineering and Mathematics (STEM) > Engineering and Innovation
Faculty of Science, Technology, Engineering and Mathematics (STEM)
Item ID: 56135
Depositing User: Rongshan Qin
Date Deposited: 14 Aug 2018 13:24
Last Modified: 06 May 2019 19:32
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