Journal
JOURNAL OF PRESSURE VESSEL TECHNOLOGY-TRANSACTIONS OF THE ASME
Volume 132, Issue 1, Pages -Publisher
ASME
DOI: 10.1115/1.4000347
Keywords
butt welding; drilling; finite element analysis; internal stresses; pipes; steel; X-ray diffraction
Categories
Funding
- EPSRC through the Supergen 2 program [GR/S86334/01, EP/F029748]
- Alstom Power Ltd
- Corus
- E.ON Engineering Ltd
- Doosan Babcock Energy Ltd
- National Physical Laboratory
- QinetiQ
- Rolls-Royce plc
- RWE npower
- Sermatech Ltd.
- Siemens Industrial Turbomachinery Ltd
- Engineering and Physical Sciences Research Council [GR/S86334/01, EP/F029748/1] Funding Source: researchfish
- EPSRC [EP/F029748/1] Funding Source: UKRI
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Residual macrostresses in a multipass circumferentially butt-welded P91 ferritic steel pipe have been determined numerically and experimentally. The welded joint in a pipe with an outer diameter of 290 mm and a wall thickness of 55 mm is typical of power generation plant components. An axisymmetric thermomechanical finite element model has been used to predict the resulting residual hoop and axial stresses in the welded pipe. The effects of the austenite to martensite phase transformation have been incorporated into the simulation. Residual stresses have been measured using the X-ray diffraction technique along the outer surface of the pipe and using the deep-hole drilling technique through the wall thickness at the center of the weld. Good correlation has been demonstrated between the residual hoop and the axial stresses obtained numerically and experimentally. The paper demonstrates the importance of using a mixed experimental and numerical approach to determine accurately the residual macrostress distribution in welded components.
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