Residual stress measurements in a P92 steel-In625 superalloy metal weldment in the as-welded and after post weld heat treated conditions

Skouras, A.; Flewitt, Peter E J; Peel, Matthew; Pavier, Martyn J

doi:10.1016/j.ijpvp.2014.07.007

Cited by 14 publications

(5 citation statements)

References 20 publications

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“…The modelling is used to provide support to the experimental data. This complements the wider body of work on the determination of residual stress in materials and components for nuclear power and similar applications [13], [14], [15], [16], [17], [18], [19] and [20].…”

Section: Introductionmentioning

confidence: 53%

Residual stress characterization of single and triple-pass autogenously welded stainless steel pipes

Haigh

Hutchings

Fitzpatrick

et al. 2016

International Journal of Pressure Vessels and Piping

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A note on versions:The version presented here may differ from the published version or, version of record, if you wish to cite this item you are advised to consult the publisher's version. Please see the 'permanent WRAP url' above for details on accessing the published version and note that access may require a subscription. Hughes. AbstractUsing neutron diffraction the components of the residual stress field have been determined in the region near a mid-length groove in two identical austenitic stainless pipes in which weld beads had been laid down. One pipe sample had a single pass, and the second a triple pass, autogenous weld deposited around the groove circumference. The results show the effect on the stress field of the additional weld deposited and are compared to the results of Finite Element Modelling. The hoop stress component is found to be generally tensile, and greater in the triple pass weldment than in the single pass weldment. The hoop stresses reach peak values of around 400 MPa in tension. X-ray measurements of the residual stress components on the near inner surface of the pipe weldments are also presented, and show tensile stresses in both pipes, with a higher magnitude in the threepass weldment.

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Section: Introductionmentioning

confidence: 53%

Residual stress characterization of single and triple-pass autogenously welded stainless steel pipes

Haigh

Hutchings

Fitzpatrick

et al. 2016

International Journal of Pressure Vessels and Piping

View full text Add to dashboard Cite

show abstract

“…In the context of through-process modelling on componentscale geometries, e.g. pipe girth-welds [61,143] or pipe saddle joints [119], CP modelling is currently too high-resolution and too computationally expensive to be practical. Similarly, coupled PFM-CP models are limited by small FE domains, e.g.…”

Section: Microstructural Crystal Plasticity Modellingmentioning

confidence: 99%

A review of thermal, microstructural and constitutive modelling of 9Cr steel for power plant applications: Towards a through-process model for structural integrity of welded connections

Ardghail

Leen

Harrison

2020

International Journal of Pressure Vessels and Piping

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“…The great difference in hardness value between CGHAZ and ICHAZ also resulted in poor performance of the welded joint. Residual stress evolved in P92 weldments mainly due to the high heat input or the transformation of FCC austenite into BCT martensite during the cooling cycle of the welding process [39,40]. The residual stress present in the WFZ mainly combined with the crack-susceptible martensitic microstructure or the diffusible hydrogen present in the WFZ, leading to cracking in the weldments [41,42].…”

Section: Introductionmentioning

confidence: 99%

Influence of PWHT Parameters on the Mechanical Properties and Microstructural Behavior of Multi-Pass GTAW Joints of P92 Steel

et al. 2022

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The 9% Cr steels were developed for ultra-supercritical (USC) power plants to meet the requirements of high operating temperature and pressure. These steels are produced to operate at high temperatures where impact toughness is not a concern; however, it becomes important for the welded joints to have good impact toughness at room temperature for manufacturing. The present work investigates the effect of the post-weld heat treatment (PWHT) parameters, i.e., temperature and time, on the impact toughness of multi-pass gas tungsten arc welded (GTAW) joints of ferritic/martensitic grade P92 steel. The microstructural evolution in welded joints given varying post-weld temperatures and times was studied. The lath martensitic structure of the weld metal for the as-welded joints resulted in high hardness and low impact toughness. The weld fusion zone toughness was 12 J, which was lower than the minimum specified values of 41 J (ASME standards) and 47 J (EN ISO 3580:2017). The PWHT temperature and time were found to have a significant effect on the impact toughness of the weld metal. A drastic increase in the impact toughness of the weld metal was noticed, which was attributed to lath break-up, reduction in dislocation density and reduction in solid solution hardening. The maximum impact toughness of 124 J was measured for PWHT temperature and time of 760 °C and 120 min, respectively. The effect of PWHT parameters on tensile strength was also investigated, and test results showed that the joint was safe for USC boiler application as it failed from the region of the P92 base metal. The variation in microstructural evolution along the weldments resulted in hardness variation. PWHT led to homogeneity in microstructure and, ultimately, reduction in hardness value. According to the study, the optimum temperature and time for PWHT of a GTAW joint of P92 steel were found to be 760 °C and 120 min, respectively.

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Residual stress measurements in a P92 steel-In625 superalloy metal weldment in the as-welded and after post weld heat treated conditions

Cited by 14 publications

References 20 publications

Residual stress characterization of single and triple-pass autogenously welded stainless steel pipes

Residual stress characterization of single and triple-pass autogenously welded stainless steel pipes

A review of thermal, microstructural and constitutive modelling of 9Cr steel for power plant applications: Towards a through-process model for structural integrity of welded connections

Influence of PWHT Parameters on the Mechanical Properties and Microstructural Behavior of Multi-Pass GTAW Joints of P92 Steel

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