Burn-through prediction during in-service welding based on residual strength and high-temperature plastic failure criterion

Wu, Qian; Han, Tao; Wang, Hongtao; Xu, Shihang; Lou, Yuxin; Wang, Yong

doi:10.1016/j.ijpvp.2020.104280

Cited by 6 publications

(2 citation statements)

References 2 publications

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“…Then the burn-through risk could be evaluated based on the ASME B31G procedure [ 18 ]. In recent years, Xue [ 19 ], Li [ 20 ], Guo [ 21 ], and Wu [ 22 ] also made efforts to develop the residual strength model. Essentially, the residual strength model did not consider the effects of welding stress and pipe pressure.…”

Section: Introductionmentioning

confidence: 99%

Study on the Dynamic Evolution Behavior and Failure Mechanism of Burn-Through Instability during In-Service Welding by Combining In-Situ Observation and Failure Analysis

2023

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There remains a lack of systematic understanding of burn-through instability, which also restricts the development of evaluation criteria. Based on the designed test device, the dynamic evolution behavior and failure mechanism of burn-through instability were investigated by combining in-situ CCD observation and failure analysis. In the initial stage of burn-through instability, the penetrating defect initiated beneath the molten pool bulge and propagated toward the arc. Finally, the weld centerline cracks or pinholes contributed to the pipeline failure. Based on in-situ observation, the burn-through pinhole was found to be forming in the overheating zone. Cracks and pinholes were found simultaneously in the burn-through instability zone and played an essential role in the burn-through instability. It could be concluded that a major burn-through hole was mainly developed from the fusion line to the inner wall surface along the wall thickness. According to the failure behavior and phenomena, the in-service burn-through instability area was divided into four parts, which were the damage failure (DF) zone, burn-through instability (BTI) zone, propagation (P) zone, and secondary burn-through zone (BT2). The failure mechanisms of the damage failure (DF) zone and burn-through instability (BTI) zone were significantly affected by the high temperature and plastic strain. The failure behavior of the propagation (P) zone was influenced considerably by the DF and BTI zones. The secondary burn-through zone was mainly affected by the high temperature. The uneven distribution of chemical elements showed an important influence on defect initiation.

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Section: Introductionmentioning

confidence: 99%

Study on the Dynamic Evolution Behavior and Failure Mechanism of Burn-Through Instability during In-Service Welding by Combining In-Situ Observation and Failure Analysis

2023

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“…Based on the consideration of engineering value, previous studies mainly focus on the evaluation criteria of in-service welding. The previous criteria mainly include the minimum wall thickness criterion [3], inner wall maximum temperature criterion [4,5], residual strength criterion and plastic failure criterion [6]. It can be found that all the failure models are based on the phenomenon and mechanism of in-service welding failure instability, but there is still a lack of research on the plastic deformation and failure mechanism of burn-through instability.…”

Section: Introductionmentioning

confidence: 99%

In situ observation of deformation and failure behavior in the burn-through instability zone of in-service welding

Zhang¹,

Han²,

Wang³

2023

AETR

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Based on the in-situ high-temperature SEM and laser scanning confocal microscope (LSCM), the high-temperature plastic deformation and failure behavior of X65 pipeline steel at 1000℃ and 1200℃ were studied in this paper, and the strain evolution behavior in this process was analyzed by DIC technology. In this study, the precipitation and dissolution of carbide at the austenite grain boundary were observed during the in situ heating process. The external load showed a great effect on the growth of the grains, and the grains grew rapidly by swallowing each other. The grain size, material performance, and misorientation played an important role during the deformation and crack evolution. At high temperatures, cracks were mainly initiated and propagated in the position with a large plastic strain. The strain concentration showed a significant effect on crack initiation.

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Analysis of the dynamic evolution behavior of radial deformation and cracks during in-service welding instability based on quasi-in-situ and in-situ experiments

Han,

et al. 2023

International Journal of Pressure Vessels and Piping

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Burn-through prediction during in-service welding based on residual strength and high-temperature plastic failure criterion

Cited by 6 publications

References 2 publications

Study on the Dynamic Evolution Behavior and Failure Mechanism of Burn-Through Instability during In-Service Welding by Combining In-Situ Observation and Failure Analysis

Study on the Dynamic Evolution Behavior and Failure Mechanism of Burn-Through Instability during In-Service Welding by Combining In-Situ Observation and Failure Analysis

In situ observation of deformation and failure behavior in the burn-through instability zone of in-service welding

Analysis of the dynamic evolution behavior of radial deformation and cracks during in-service welding instability based on quasi-in-situ and in-situ experiments

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