Journal
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
Volume 510-11, Issue -, Pages 234-237Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.msea.2008.05.056
Keywords
Post-weld heat treatment; Creep; Advanced ferritic steels; Mo-equivalent; Secondary hardening
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The T23 and T24 steels were designed for welding membrane water walls without preheating and without post-weld heat treatment (PWHT). Results presented demonstrate that non-tempered weld joints of low-alloy creep-resistant steels T23 and T24 undergo a process of secondary hardening during long-term exposure at elevated temperatures. This process is accompanied by degradation of plastic properties, especially in the heat affected zone (HAZ). Therefore, PWHT of T23 and T24 welds is necessary to achieve suitable hardness and plastic properties of welds. (C) 2008 Elsevier B.V. All rights reserved.
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