Current postweld heat treatment (PWHT) methods rely mainly on static thermal sources or line heating using dispersed beams which require significant capital investment and often pose limits on weldment size. In the current study, an alternative PWHT method based on line heating is presented and analyzed. The method, which is intended to perform low temperature stress relief, employs parallel oxyacetylene torches to induce a tensile stress in the vicinity of the weld toe. X-ray diffraction (XRD) measurements taken from bead-on-plate (BOP) welds made using ASTM A572-50 showed a 37% decrease in the peak longitudinal stress after parallel line reheating was performed. A corresponding reduction in the stress gradient on the plate surface was also observed. Welding and reheating were also modeled in sysweld to assess how torch placement affected the longitudinal stress distribution and an optimum offset was identified for the 8-mm plate thickness used. Analysis of the thermomechanical history in the vicinity of the weld toe indicates that a tensile stress is superposed during reheating and is concurrent with the reduction in the peak longitudinal stress.
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April 2016
Research-Article
Residual Stress Reduction in Single Pass Welds Using Parallel Line Reheating
Junqiang Wang,
Junqiang Wang
School of Mechanical,
Electronic and Control Engineering,
Beijing Jiaotong University,
Beijing 100044, China
Electronic and Control Engineering,
Beijing Jiaotong University,
Beijing 100044, China
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Jianmin Han,
Jianmin Han
School of Mechanical,
Electronic and Control Engineering,
Beijing Jiaotong University,
Beijing 100044, China
e-mail: jhan@bjtu.edu.cn
Electronic and Control Engineering,
Beijing Jiaotong University,
Beijing 100044, China
e-mail: jhan@bjtu.edu.cn
Search for other works by this author on:
Joseph P. Domblesky,
Joseph P. Domblesky
Mechanical Engineering Department,
Marquette University,
1515 West Wisconsin Avenue,
Milwaukee, WI 53201 1881
Marquette University,
1515 West Wisconsin Avenue,
Milwaukee, WI 53201 1881
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Weijing Li,
Weijing Li
School of Mechanical,
Electronic and Control Engineering,
Beijing Jiaotong University,
Beijing 100044, China
Electronic and Control Engineering,
Beijing Jiaotong University,
Beijing 100044, China
Search for other works by this author on:
Zhiyong Yang,
Zhiyong Yang
School of Mechanical,
Electronic and Control Engineering,
Beijing Jiaotong University,
Beijing 100044, China
Electronic and Control Engineering,
Beijing Jiaotong University,
Beijing 100044, China
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Yingxin Zhao
Yingxin Zhao
School of Mechanical,
Electronic and Control Engineering,
Beijing Jiaotong University,
Beijing 100044, China
Electronic and Control Engineering,
Beijing Jiaotong University,
Beijing 100044, China
Search for other works by this author on:
Junqiang Wang
School of Mechanical,
Electronic and Control Engineering,
Beijing Jiaotong University,
Beijing 100044, China
Electronic and Control Engineering,
Beijing Jiaotong University,
Beijing 100044, China
Jianmin Han
School of Mechanical,
Electronic and Control Engineering,
Beijing Jiaotong University,
Beijing 100044, China
e-mail: jhan@bjtu.edu.cn
Electronic and Control Engineering,
Beijing Jiaotong University,
Beijing 100044, China
e-mail: jhan@bjtu.edu.cn
Joseph P. Domblesky
Mechanical Engineering Department,
Marquette University,
1515 West Wisconsin Avenue,
Milwaukee, WI 53201 1881
Marquette University,
1515 West Wisconsin Avenue,
Milwaukee, WI 53201 1881
Weijing Li
School of Mechanical,
Electronic and Control Engineering,
Beijing Jiaotong University,
Beijing 100044, China
Electronic and Control Engineering,
Beijing Jiaotong University,
Beijing 100044, China
Zhiyong Yang
School of Mechanical,
Electronic and Control Engineering,
Beijing Jiaotong University,
Beijing 100044, China
Electronic and Control Engineering,
Beijing Jiaotong University,
Beijing 100044, China
Yingxin Zhao
School of Mechanical,
Electronic and Control Engineering,
Beijing Jiaotong University,
Beijing 100044, China
Electronic and Control Engineering,
Beijing Jiaotong University,
Beijing 100044, China
1Corresponding author.
Contributed by the Pressure Vessel and Piping Division of ASME for publication in the JOURNAL OF PRESSURE VESSEL TECHNOLOGY. Manuscript received May 8, 2015; final manuscript received September 2, 2015; published online October 6, 2015. Assoc. Editor: Xian-Kui Zhu.
J. Pressure Vessel Technol. Apr 2016, 138(2): 021402 (9 pages)
Published Online: October 6, 2015
Article history
Received:
May 8, 2015
Revised:
September 2, 2015
Citation
Wang, J., Han, J., Domblesky, J. P., Li, W., Yang, Z., and Zhao, Y. (October 6, 2015). "Residual Stress Reduction in Single Pass Welds Using Parallel Line Reheating." ASME. J. Pressure Vessel Technol. April 2016; 138(2): 021402. https://doi.org/10.1115/1.4031548
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