Specimen-size dependency and modelling of energy evolution during high-temperature low-cycle fatigue of pressure vessel steel
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Date
2011-08-01
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Publisher
Elsevier Ltd.
Abstract
High-temperature low-cycle fatigue testing was conducted on pressure vessel steel using standard and miniature specimen sizes and the fatigue toughness required for macrocrack propagation was investigated. A definite specimen-size dependency was observed for both the threshold cumulative plastic strain energy and cycles required for macrocrack propagation, which was explained to be influenced by geometric conditions. An analytical modelling prediction was developed that accounted for specimen-size dependency and was successfully applied to predict fatigue toughness to macrocrack propagation. (C) 2011 Acta Materialia Inc.
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Keywords
Temperature range 0400-1000 K, Pressure vessels, Fatigue, Ferritic steels, Fracture properties, Deformation
Citation
Callaghan, M.D., Humphries, S.R., Law, M., Ho, M., Yan, K., Yeung, W.Y. (2011). Specimen-size dependency and modelling of energy evolution during high-temperature low-cycle fatigue of pressure vessel steel. Scripta Materialia, 65(4), 308-311. doi:10.1016/j.scriptamat.2011.04.038