FEM analysis of residual stress induced by repair welding in SUS304 stainless steel pipe butt-welded joint

Dai, Peiyuan; Wang, Yifeng; Li, Suo; Lu, Shilei; Gui, Feng; Deng, Dean

doi:10.1016/j.jmapro.2020.09.006

Cited by 47 publications

(22 citation statements)

References 22 publications

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“…Elastic strain, plastic strain, thermal strain, and strain caused by phase transformation were mainly considered in the mechanical analysis, so the total strain can be described as the following equation [16]:…”

Section: Mechanical Analysismentioning

confidence: 99%

“…The literature [5][6][7][8] mentions that weld overlay repair can reduce the residual stress and even reverse tensile stress into compressive stress in the area of interest of pressurized water reactor (PWR), boiling water reactor (BWR), penetration nozzle, and nuclear reactor pipe. The post-weld residual stress distributions within the components are affected by many factors, like heat input [9], pre-heating temperature [10,11], temper bead temperature [3], inter-pass temperature, post-weld heat treatment [12], welding sequence [7,[13][14][15][16][17], multi-layer [9,18], weld overlay geometry [4][5][6]19], welding filler metal [12,20], etc.…”

Section: Introductionmentioning

confidence: 99%

“…Zhang et al [7] concluded that the center-to-outside welding sequence obtained the best repair results compared to left-to-right and outside-to-center welding sequences in the weld overlay repair of pipes in BWRs. It is worth noting that the last weld pass has a key impact on the final stress distribution [7,16,17,21]. In addition, a reasonable bead sequence can improve hardness distribution and microstructure in heat-affected zones [13,14].…”

Section: Introductionmentioning

confidence: 99%

“…For weld overlay geometry, weld overlay length has a great impact on residual stress distribution; as the applied overlay length increases, the peak value of repair-induced residual stress decreases in the weld repair of the penetration nozzle [6] and the SUS304 stainless steel pipe butt-welded joint [16]. The authors in [19] systematically studied the influence of the weld overlay geometry on the repair of pipeline components and concluded that the weld overlay should be as long, narrow, and shallow as possible.…”

Section: Introductionmentioning

confidence: 99%

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Effect of Welding Sequence and the Transverse Geometry of the Weld Overlay on the Distribution of Residual Stress in the Weld Overlay Repair of T23 Tubes

Xiao

Liu

et al. 2021

Metals

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Water-wall tubes are important components in power plants and are used to absorb the heat from the boilers, and they often fail prematurely due to corrosion, erosion, and fatigue during service. To repair the defects, weld overlay repair is often adopted by forming a compressive stress area around the susceptible area to prevent the cracks from propagating. In order to obtain reasonable process parameters of weld overlay repair, a study combining experiments and numerical simulations was performed to investigate the welding residual stress distribution on the repaired area with different welding repair methods. The results reveal that a compressive stress area is generated on the repaired area after the repair, and a center-to-outside welding sequence is better than either a right-to-left welding sequence or an outside-to-center welding sequence when overlaying a one-layer weld; with an increase in the number of weld layers, the compressive stress area of the repaired area is expanded, and the stress level is increased, which results from the upward movement of the compressive stress area of the subsequent-overlaying layer and the superposition of the compression areas of the subsequent-overlaying layer and previous-overlaying layer, respectively. In addition, the number of the weld passes of each layer should be not less than four with the center-to-outside welding sequence.

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Section: Mechanical Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Effect of Welding Sequence and the Transverse Geometry of the Weld Overlay on the Distribution of Residual Stress in the Weld Overlay Repair of T23 Tubes

Xiao

Liu

et al. 2021

Metals

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“…Residual stress distribution in an AISI 304 stainless steel induced by welding is analyzed. [2] The pitting corrosion takes place through different stages. First, the pit nucleation occurs, after which metastable pits are consecutively forming, growing, and repassivating.…”

Section: Introductionmentioning

confidence: 99%

Influence of microstructure and roughness level on corrosion resistance of the austenitic stainless steel welded joint

Kovačina

Jegdić

Radojković

et al. 2021

Materials & Corrosion

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The influence of microstructure and surface roughness of the X5CrNi18-10 austenitic stainless steel-welded joint on resistance to uniform, pitting, and intergranular corrosion, as well as on the stability of the passive film, was evaluated. The microstructure was revealed by optical microscopy and scanning electron microscopy, whereas surface topography and roughness levels were determined by atomic force microscopy. Corrosion characteristics were obtained by the electrochemical potentiokinetic reactivation method with double loop, electrochemical impedance spectroscopy method, as well as by potentiodynamic measurements. The degree of sensitization of heat-affected zone (HAZ) was significantly lower than the threshold value required for the occurrence of intergranular corrosion. However, HAZ showed a significantly greater tendency to pitting and uniform corrosion compared to weld metal and base metal. No effect of roughness levels (RMS from 3.6 to 54 nm) on the pitting potential value of the welded joint was observed (unlike in HAZ). The polished surface shows significantly higher corrosion resistance than the grinded surface. Generally, polishing improved corrosion resistance, especially in HAZ, which is very important because HAZ is a critical place for the occurrence of pitting and other types of corrosion.

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High accuracy and efficiency calculation model for predicting the reduction of residual stress on large pressure vessels by ultrasonic impact surface treatment

Luo

Jiang

Zeng

2023

Engineering Reports

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Ultrasonic impact treatment (UIT) is a new surface strengthening method to reduce the residual stresses on large pressure vessels induced by surface and repair welding. An accurate and high efficiency calculation model is the key to accurately predicting the full‐field residual stresses on large pressure vessels under the UIT process. In this article, a full‐coverage impacting model is proposed to simulate the impacting process of the UIT pin. The effects of UIT on the residual stresses on repair and surface welded pressure vessels were investigated by explicit dynamic simulation. Experiments were also performed to verify the prediction results. Results show that the proposed full coverage impacting model can greatly improve the simulation precision and the calculation efficiency. The predicted residual stresses after the UIT process using the proposed model are consistent with the measured results. A remarkable reduction in residual stress was achieved in the zone subjected to UIT. The tensile residual stresses on the surface of the treated area were reduced to compressive stresses. With the increase of the impact velocity and the coverage rate, the residual stresses on the surface and transition layers decreased and then tended to stabilize. The impact coverage rate should not exceed 200% to avoid damage and save time.

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FEM analysis of residual stress induced by repair welding in SUS304 stainless steel pipe butt-welded joint

Cited by 47 publications

References 22 publications

Effect of Welding Sequence and the Transverse Geometry of the Weld Overlay on the Distribution of Residual Stress in the Weld Overlay Repair of T23 Tubes

Effect of Welding Sequence and the Transverse Geometry of the Weld Overlay on the Distribution of Residual Stress in the Weld Overlay Repair of T23 Tubes

Influence of microstructure and roughness level on corrosion resistance of the austenitic stainless steel welded joint

High accuracy and efficiency calculation model for predicting the reduction of residual stress on large pressure vessels by ultrasonic impact surface treatment

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