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Title: Post Weld Heat Treatment for High Strength Steel Welded Connections
Authors: Zhao, Ming Shan
Chiew, S. P.
Lee, C. K.
Keywords: Welded connections
Post-weld heat treatment
High strength steel
Residual stress
Tensile behavior
Issue Date: 2016
Source: Zhao, M. S., Chiew, S. P., & Lee, C. K. (2016). Post Weld Heat Treatment for High Strength Steel Welded Connections. Journal of Constructional Steel Research, 122, 167-177.
Series/Report no.: Journal of Constructional Steel Research
Abstract: In this study, experiments were conducted to investigate the effect of post-weld heat treatment (PWHT) on the reheated, quenched and tempered (RQT) grade S690 high strength steel welded connections. Firstly, the effect of PWHT on the mechanical properties after welding is investigated. It is found that the loss of both strength and ductility after welding could be serious but PWHT could be able to improve the ductility of the affected specimens at the expense of strength. Secondly, four Y-shape plate-to-plate (Y-PtP) and nine T-stub RQT-S690 joints are fabricated to study the effect of PWHT on the residual stress level near the weld toe and the tensile behavior of the joints, respectively. The hole drilling tests employed to study the residual stress reveal that PWHT is able to decrease the residual stress level near the weld toe significantly. The tensile test results show that proper PWHT could improve both the ductility and the maximum resistance while the reduction of plastic resistance can be kept in a negligible level. However, it is found that if the specimens are overheated, although the ductility could still be increased, the reduction of load carrying capacity was severe.
ISSN: 0143-974X
DOI: 10.1016/j.jcsr.2016.03.015
Schools: School of Civil and Environmental Engineering 
Rights: © 2016 Elsevier. This is the author created version of a work that has been peer reviewed and accepted for publication by Journal of Constructional Steel Research, Elsevier. It incorporates referee’s comments but changes resulting from the publishing process, such as copyediting, structural formatting, may not be reflected in this document. The published version is available at: [].
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:CEE Journal Articles

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