Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7971523 | Materials Science and Engineering: A | 2018 | 28 Pages |
Abstract
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 >â¯83% by the electropulsing treatment. It was proved that the anti-aging treatment was not due to the Ohm heating. Instead, the electropulsing-induced extra free energy change of ââ¯891â¯J/mol provided thermodynamic driving force for the regeneration processing. Electropulsing-enhanced diffusivity enables the anti-aging processing to be completed quickly.
Related Topics
Physical Sciences and Engineering
Materials Science
Materials Science (General)
Authors
Yan Zhao, Binyan He, Sébastien Saillet, Christophe Domain, Patrick Le Delliou, Michel Perez, Rongshan Qin,