Measured and predicted residual stresses in thick section electron beam welded steels

Smith, David J.; Zheng, Gang; Hurrell, Paul; Gill, Christopher M.; Pellereau, Benjamin M. E.; Ayres, K.; Goudar, D. M.; Kingston, E.

doi:10.1016/j.ijpvp.2014.05.001

Cited by 45 publications

(4 citation statements)

References 21 publications

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“…Firstly, the peak stresses in the as-welded condition appear to be in the order of 700 MPa. This value appears to be slightly (~ 10 %) higher than those typically reported for welds in SA508 steel [10,15]. It is possible that the narrow weld groove, together with the ligaments of material that remained in tact at either end of the specimen, led to high levels of constraint, and therefore contributed to the generation of high levels of stress.…”

Section: Figure 5: Longitudinal Residual Stresses As Measured By the mentioning

confidence: 63%

An evaluation of multipass narrow gap laser welding as a candidate process for the manufacture of nuclear pressure vessels

Feng

Rathod

Roy

et al. 2017

International Journal of Pressure Vessels and Piping

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Nuclear pressure vessels are currently fabricated using arc welding processes.Recently, considerable effort has been directed at the development of electron beam welding as an alternative fabrication technique owing to the substantial productivity gains it would offer. However, little attention has been directed at laser-based techniques. In this work we evaluate the potential for applying multipass narrow-gap laser welding (NGLW) to the fabrication of nuclear pressure vessels, based on the characterization of a 30 mm thick weld in SA508 steel. Although still a multipass process, the number of passes is reduced in comparison to an arc weld of the same thickness, and the deposition of successive passes provides a degree of tempering to previously deposited weld metal in a way that the electron beam welding process does not. Principal engineering challenges 2 for the implementation of multipass NGLW include the achievement of appropriate joint fit-up, and the shielding of a molten pool at the base of a deep and narrow weld groove.

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Section: Figure 5: Longitudinal Residual Stresses As Measured By the mentioning

confidence: 63%

An evaluation of multipass narrow gap laser welding as a candidate process for the manufacture of nuclear pressure vessels

Feng

Rathod

Roy

et al. 2017

International Journal of Pressure Vessels and Piping

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“…The distribution of WRS can be highly affected by the composition of the welded alloys. For example, the WRS in EB welded austenitic stainless steel 316L plates can be distributed in wider area around the weld centerline in comparison with ferritic steel EB weldments 10 . In a comprehensive study, Javadi et al 11 used neutron diffraction, X‐ray diffraction, contour method, incremental deep hole drilling, and incremental center hole drilling in a round robin residual stress measurement of an electron beam welded joint between type 316L and ferritic steel P91.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of fracture toughness and residual stress in AISI 316L electron beam welds

Mokhtarishirazabad

Simpson

Kabra

et al. 2021

Fatigue Fract Eng Mat Struct

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Weld residual stress and fracture behavior of 316L electron beam weldments, which are of particular interest in power generation industry, were investigated in this work. Two butt‐weld joints were manufactured in stainless steel 316L plates of 6 mm and 25.4 mm thicknesses. Three complementary methods were used to measure the three orthogonal components of the residual stress in the weld coupons, and fracture tests were conducted on single edge notched bending specimens extracted from different regions of the welds and parent metals. The residual stress measurements showed a maximum value of 450 MPa in longitudinal direction, while it was less than 150 MPa in the other two orthogonal directions, revealing that in our material, and with the chosen weld parameters, the residual stresses were biaxial. The fracture resistance of the weldment and parent material was similar, with material microstructure differences being more significant than the measured residual stresses. The study suggests that 316L electron beam weldments are not susceptible to fracture failure due to their high ductility and ability to relieve residual stresses through gross plasticity. Electron beam welding may therefore be suggested as a reliable manufacturing technology for safety critical 316L components.

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“…Initial works on DHD can be found in [21]. More recent improvements of the DHD method have been made by Smith and his co-workers [23][24][25][26] at the University of Bristol. Recently, attempts have been made to extend the DHD method to measure cure process induced residual stresses of composite laminates [27][28][29].…”

Section: Introductionmentioning

confidence: 99%

Measurement of manufacture assembly stresses in thick composite components using a modified DHD method

Cao

et al. 2020

Composites Part A: Applied Science and Manufacturing

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Understanding of the through-thickness distribution of assembly stresses caused by manufacture process-induced distortion (PID) in thick composite components is essential for safety and reliability assessment. Inspired by deep-hole drilling (DHD) method which is widely used to reconstruct residual stresses in thick metallic components, current research attempts to extend and modify the DHD technique to measure the manufacture assembly stresses in composite components. It is observed that the modified DHD technique can capture the global deformation profiles induced by the assembly stresses, but the previous DHD stress calculation method produces large stress errors. An integrating stress calculation method is then proposed by combining the homogeneous global and the layer-wise antistrophic stress-strain solutions. It is demonstrated that the assembly stresses calculated by the proposed integrating calculation method are significantly improved and it is feasible to measure the manufacture assembly stresses of thick composite components with the modified DHD technique.

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Measured and predicted residual stresses in thick section electron beam welded steels

Cited by 45 publications

References 21 publications

An evaluation of multipass narrow gap laser welding as a candidate process for the manufacture of nuclear pressure vessels

An evaluation of multipass narrow gap laser welding as a candidate process for the manufacture of nuclear pressure vessels

Evaluation of fracture toughness and residual stress in AISI 316L electron beam welds

Measurement of manufacture assembly stresses in thick composite components using a modified DHD method

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