Improving bonding quality of underwater friction stitch welds by selecting appropriate plug material and welding parameters and optimizing joint design

Zhang, Xunda; Deng, Caiyan; Wang, Dongpo; Wang, Zhijiang; Teng, Jinhu; Cao, Jian; Xu, Wei; Yang, Fanyi

doi:10.1016/j.matdes.2015.11.114

Cited by 19 publications

(13 citation statements)

References 13 publications

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“…The friction stud welding (FSW) method has many advantages (Yin et al, 2016;Ma et al, 2018), such as high efficiency, low material consumption, and non-pollution. Therefore, this method has been developing rapidly in the underwater application (Zhang et al, 2016). Many researchers have carried out a series of researches on the application of FSW technology in underwater junction (Nicholas, 1984;Gao et al, 2014), and this technology is gradually applied to the connection of less important comparatively structures such as sacrificial anode.…”

Section: Introductionmentioning

confidence: 99%

Probing the Anti-Corrosion Behavior of X65 Steel Underwater FSW Joint in Simulated Seawater

Gao

Sun

et al. 2022

Front. Mater.

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To detect the corrosion resistance of a friction stud welding (FSW) joint in simulated seawater (a 3.5 wt% NaCl solution), the pulse electrochemical deposition method was used for electroplating Ni coating with different duty ratios (50%, 80%, and 100%) on the surface of FSW joint. The microstructure and surface structure of the coating were observed by micro-spectroscopy and other characterization methods. The corrosion behavior of the coating was analyzed by means of macroscopic electrochemical testing. The local corrosion law of joint surface and coating surface defects were innovatively explored by using micro-zone electrochemical scanning system. The coating characterization results showed that, as the duty ratio continues to increase, the coating surface becomes denser and smoother, and the corrosion products such as Fe2O3, Fe3O4, and FeOOH are generated. The results of macroscopic electrochemical experiment indicated that the coating with 100% duty ratio has the lowest corrosion current density and the maximum polarization resistance. The scanning vibrating electrode technique results showed that the corrosion current density in the defect area is higher than that in the coating area, and the maximum corrosion current density decreases with the increase of duty ratio. The localized electrochemical impedance spectroscopy results indicated that the localized impedance at the welded zone was the largest, and with the increase of the pulse duty ratio, the impedance diffusion in the defect area was decreasing.

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Section: Introductionmentioning

confidence: 99%

Probing the Anti-Corrosion Behavior of X65 Steel Underwater FSW Joint in Simulated Seawater

Gao

Sun

et al. 2022

Front. Mater.

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“…Repair of damaged parts in offshore (subsea/underwater) and onshore environments is requisite to prolong the service/useful life of structural parts, reduce part-replacement cost, and fabrication lead-time of new parts (Zhang et al, 2016). The conventional underwater/wet arc welding methods are known to be prone to hydrostatic pressure-induced arc instability once the depth at which welding/repair is mandatory goes beyond 40 m (Zhang et al, 2016). Also, an additional operational cost is usually incurred in welding/repairing parts at underwater depths beyond 40 m as a dry chamber/cabin is required to ensure the safety of welders/divers (Zhang et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

“…The conventional underwater/wet arc welding methods are known to be prone to hydrostatic pressure-induced arc instability once the depth at which welding/repair is mandatory goes beyond 40 m (Zhang et al, 2016). Also, an additional operational cost is usually incurred in welding/repairing parts at underwater depths beyond 40 m as a dry chamber/cabin is required to ensure the safety of welders/divers (Zhang et al, 2016). Thus, there is a need to have a repair strategy or method that will be suitable for underwater repairs irrespective of the level of underwater depths.…”

Section: Introductionmentioning

confidence: 99%

“…The success of these studies in an underwater environment has spurred the adaptation of solid-state friction stir processing for repair purposes. Friction hydro-pillar processing, underwater friction taper plug welding, or friction stitch welding process has been employed for repair purposes in literature (Zhang et al, 2016) (Teng et al, 2017). This approach involves a combination of drilling (of a blind hole) and filling (of the drilled hole) by employing a consumable tapered plug mounted/attached to the end of the rotating welding tool.…”

Section: Introductionmentioning

confidence: 99%

“…A somewhat amount of time, cost, and drudgery go into the plug (tool) preparation, and the hardness and weldability of the plug material also play a significant role in achieving an effective repair. Zhang et al (2016) acclaimed that the use of a plug with lower hardenability and better weldability is essential in achieving good underwater friction stitch welds. In view of this, this paper examines the use of a non-consumable tool to repair gas metal arc welded line of AISI 201 austenitic stainless steel via friction stir stitching approach.…”

Section: Introductionmentioning

confidence: 99%

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Modeling and optimization of friction stir stitching of AISI 201 stainless steel via Box-Behnken design methodology

Ojo

Obasha

2022

Production Engineering Archives

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The paper investigates the modelling and optimization of the notch-repaired/friction stir stitched AISI 201 stainless steel welds via the use of a non-consumable tool-based repair process. The repair process employs a sequential hopping-stitching approach. This approach involves the application of two intercepted and completely overlapped plunging actions of a probe-less titanium carbide tool to create an effective refilling and repair of the notched zone. Box-Behnken design (BBD) was employed for the experimental planning, modelling, and optimization of the notch-repair process. Tool rotational speed, penetration depth and dwell time of the tool were the studied process parameters while tensile strength was the response variable. A quadratic model was identified as the best model for the notch-repaired welds based on the combination of a low sequential P-value of 0.008216, a high lack of fit P-value of 0.931366, and a close to unity adjusted and predicted R-square values. The process parameter and their interaction effects on the tensile strength of the repaired notch were identified via the ANOVA analysis. Plunge depth (main effect) and interaction effect of tool rotational speed and dwell time had significant influences on the notch-repair process and the resultant tensile strength of the AISI 201 stainless steel. The visual representations of these effects were shown through the 2D elliptical contour and 3D response surface plots. The optimized process parameters were identified as 1215.9795 rpm, 0.40262212 mm, and 5.98706376 s while the resultant notch-repaired joint yielded a tensile strength of 886 MPa, which is close to the predicted value.

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Microstructure and mechanical properties of friction stitch welds of DH36 steel in local dry conditions

Chen

Wang

et al. 2017

Int J Adv Manuf Technol

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Improving bonding quality of underwater friction stitch welds by selecting appropriate plug material and welding parameters and optimizing joint design

Cited by 19 publications

References 13 publications

Probing the Anti-Corrosion Behavior of X65 Steel Underwater FSW Joint in Simulated Seawater

Probing the Anti-Corrosion Behavior of X65 Steel Underwater FSW Joint in Simulated Seawater

Modeling and optimization of friction stir stitching of AISI 201 stainless steel via Box-Behnken design methodology

Microstructure and mechanical properties of friction stitch welds of DH36 steel in local dry conditions

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