Residual stresses in girth butt welded pipes and treatments to modify these

Shimizu, T.; Enomoto, Kunio; Sakata, Shinji; Sagawa, Wataru

doi:10.1016/0308-0161(84)90020-6

Cited by 12 publications

(4 citation statements)

References 1 publication

Supporting

Mentioning

Contrasting

Order By: Relevance

“…and 4 w SE = width of the safe-end measured at the outer surface (mm), see Fig. 2 η = welding efficiency, see Eqs (1) and (8) φ, θ , δ = non-dimensional coefficients in the R6 level 3 profile for austenitic pipe butt welds, see Eqs (5)-(7) φ M , θ M , δ M = non-dimensional coefficients of the proposed profile for dissimilar metal nozzle butt welds, see Eqs (11) and (12) σ a , σ h = axial and hoop residual stress, respectively σ 1.0p , σ 1.0w = 1.0% proof strength of the parent and weld material, respectively…”

Section: N O M E N C L a T U R Ementioning

confidence: 99%

“…Welding residual stresses in austenitic stainless steel pipe butt welds have been extensively studied to tackle stress corrosion cracking problems 8–19 . Some relevant works are worth noting, as their results could be applied to DMWs in pressurized water nuclear reactors.…”

Section: Introductionmentioning

confidence: 99%

“…[1][2][3][4] Welding residual stresses in austenitic stainless steel pipe butt welds have been extensively studied to tackle stress corrosion cracking problems. [8][9][10][11][12][13][14][15][16][17][18][19] Some relevant works are worth noting, as their results could be applied to DMWs in pressurized water nuclear reactors. Brickstad and Josefson 13 and Yaghi et al 14 performed a parametric study to investigate effects of the thickness and radius-to-thickness ratio on welding residual stresses in austenitic stainless steel pipe butt welds.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Through-wall welding residual stress profiles for dissimilar metal nozzle butt welds in pressurized water reactors

Song¹,

Kim²,

Oh³

et al. 2011

Fatigue &Amp; Fracture of Engineering Materials &Amp; Structures

View full text Add to dashboard Cite

A B S T R A C T This paper provides approximate expressions for through-wall welding residual stresses in dissimilar metal nozzle butt welds of pressurized water reactors. An idealized shape of nozzle is proposed, based on which systematic elastic-plastic thermo-mechanical finite element analyses are conducted by varying the thickness and radius of the nozzle and the length of the safe-end. Based on the results, a through-wall welding residual stress profile for dissimilar metal nozzle butt welds is proposed by modifying the existing welding residual stress profile for austenitic pipe butt welds in the R6 procedure.Keywords dissimilar metal nozzle butt welds; finite element analysis; pressurised water reactors; through-wall welding residual stress profile. N O M E N C L A T U R EA = area of weld bead, see Eq.(1) E = energy per unit length (J/mm), see Eq.(1) E = energy per unit length per unit thickness (J/mm 2 ), see Eq. (8) h = heat transfer coefficient (W/m 2 / • C), see Eq.(2) L = pipe length Q = energy rate per unit volume (W/mm 3 ), see Eq.(1) r, r i = mean and inner radius of the nozzle or the pipe, respectively, see Figs 2 and 4 T = temperature t SE , t P = thickness of the idealized nozzle and the pipe, respectively, see Figs 2 and 4 t = heating time x = radial coordinate from the bore of the nozzle or the pipe, see Figs 2 and 4 w SE = width of the safe-end measured at the outer surface (mm), see Fig. 2 η = welding efficiency, see Eqs (1) and (8) φ, θ , δ = non-dimensional coefficients in the R6 level 3 profile for austenitic pipe butt welds, see Eqs (5)-(7) φ M , θ M , δ M = non-dimensional coefficients of the proposed profile for dissimilar metal nozzle butt welds, see Eqs (11) and (12) σ a , σ h = axial and hoop residual stress, respectively σ 1.0p , σ 1.0w = 1.0% proof strength of the parent and weld material, respectively

show abstract

Section: N O M E N C L a T U R Ementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Through-wall welding residual stress profiles for dissimilar metal nozzle butt welds in pressurized water reactors

Song¹,

Kim²,

Oh³

et al. 2011

Fatigue &Amp; Fracture of Engineering Materials &Amp; Structures

View full text Add to dashboard Cite

show abstract

“…As time progressed, a diverse range of strategies emerged intending to modify and alleviate residual stresses. Studies such as Shimizu et al's investigation into residual stresses in girth butt-welded pipes [4],…”

Section: Introductionmentioning

confidence: 99%

Behavior, Failure Analysis, and Effectiveness of Mechanical Stress Improvement Process in Residual Stress Relaxations in Butt-Welded Austenitic Piping Using a Numerical Simulation Approach

Zeghida,

Guedri,

Allaoui

et al. 2024

Preprint

View full text Add to dashboard Cite

The utilization of the Mechanical Stress Improvement Process (MSIP) is a widely employed technique to improve the behavior and the failure analysis in nuclear power plants. Its purpose is to effectively prevent stress corrosion cracking by eliminating residual tensile stresses present in weldments. This approach serves to impede the formation of cracks and decelerate the advancement of existing failures in piping systems. Consequently, favorable compressive stresses are created along the inner surface of the pipe near the weld, including molten and heat-affected metal zones. To assess the efficacy of MSIP in reducing stress concentrations and enhancing structural integrity, multiple cases were evaluated via numerical simulations in this study. Moreover, the dimensions and placement of the MSIP tool were discussed, with the optimal position and width of the clamp being determined to be 30 mm from the weld line (WL) and 75 mm, respectively. The results of this study indicate that the WL region manifests significantly high compressive stresses, which gradually diminish within a 10 mm distance on each side of the WL.

show abstract

Behavior, failure analysis, and effectiveness of mechanical stress improvement process in residual stress relaxations in butt-welded austenitic piping using a numerical simulation approach

Zeghida,

Guedri,

Allaoui

et al. 2024

Int J Adv Manuf Technol

View full text Add to dashboard Cite

Residual stresses in girth butt welded pipes and treatments to modify these

Cited by 12 publications

References 1 publication

Through-wall welding residual stress profiles for dissimilar metal nozzle butt welds in pressurized water reactors

Through-wall welding residual stress profiles for dissimilar metal nozzle butt welds in pressurized water reactors

Behavior, Failure Analysis, and Effectiveness of Mechanical Stress Improvement Process in Residual Stress Relaxations in Butt-Welded Austenitic Piping Using a Numerical Simulation Approach

Behavior, failure analysis, and effectiveness of mechanical stress improvement process in residual stress relaxations in butt-welded austenitic piping using a numerical simulation approach

Contact Info

Product

Resources

About