Effect of preheating on joint quality in the friction stir welding of bimodal high density polyethylene

Rehman, Razi Ur; Sheikh-Ahmad, Jamal; Deveci, Süleyman

doi:10.1007/s00170-021-07740-w

Cited by 18 publications

(20 citation statements)

References 15 publications

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“…The maximum TS achieved was 14.9 MPa, about 66% of the TS of unwelded HDPE. The maximum TS is relatively close to that in other studies [13][14][15][16]19]. The joints of HDPE made by CDFW seem to have the best TS for an RS level of 300 rpm.…”

Section: Discussionsupporting

confidence: 84%

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Optimization of joining HDPE rods by continuous drive friction welding

Tashkandi

Becheikh

2022

Materials Science-Poland

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Continuous drive friction welding (CDFW) is a solid-state joining procedure that can be used to join various similar and dissimilar materials. High-density polyethylene (HDPE) is a thermoplastic that can replace many traditional materials. Utilizing experimental design procedures such as response surface method (RSM) is a reliable approach for determining the most significant process parameters and optimizing the desired responses. The current study employed an RSM experimental design to investigate the effects of the process parameters for welding HDPE rods using CDFW. The design evaluated the process parameters and three outcome responses: the maximum welding temperature, the axial shortening, and the tensile strength (TS). The combination of the three responses can allow achieving high-efficiency welds. The results showed that it was possible to achieve high-efficiency welds while maintaining axial shortening and controlling temperature. A TS >65% of the parent material's strength with an axial shortening of <3 mm was achieved.

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Section: Discussionsupporting

confidence: 84%

“…The effects of shoulder design in SFW of HDPE plates were analyzed [14]. The result of preheating on FSW of HDPE plates was investigated [15]. Also, the effects of the rotating speed, advancing speed, and pin design on buttwelded HDPE sheets was studied by Kaddour et al [16].…”

Section: Introductionmentioning

confidence: 99%

Optimization of joining HDPE rods by continuous drive friction welding

Tashkandi

Becheikh

2022

Materials Science-Poland

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“…They used CFD to find the optimum heat generation that maximizes tensile strength during the FSJ process. Sheikh-Ahmad et al [28,29] simulated a similar FSJ of HDPE. Shete and Yarasu [30] used the finite element method (FEM) to simulate a high-density polyethylene joint's friction stir spot welding (FSSW).…”

Section: Introductionmentioning

confidence: 99%

Effects of Noncontact Shoulder Tool Velocities on Friction Stir Joining of Polyamide 6 (PA6)

et al. 2022

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In this study, the effects of the traverse and rotational velocities of the noncontact shoulder tool on the heat generation and heated flux during the friction stir joining of high-density polyamide 6 (PA6) polymer were investigated. The computational fluid dynamics (CFD) method was employed to simulate the thermomechanical phenomena during the friction stir joining (FSJ) process of PA6. A developed model was used to consider the void formation and thermochemical properties of PA6. The surface and internal heat flow, material flow, and geometry of the joint were simulated, and an experimental study evaluated the simulation results. The simulation results indicated that the stir zone formed was smaller than regular joints with a noncontact shoulder tool. Despite the polymer’s traditional FSJ, heat generation and material flow do not differ significantly between advancing and retreating sides. On the other hand, the surface flow is not formed, and the surface temperature gradient is in a narrow line behind the tool. The material velocity increased at higher rotational speed and lower transverse velocity and in the stir zone with more giant geometry forms. The maximum generated heat was 204 °C, and the maximum material velocity was predicted at 0.44 m/s in the stir zone, achieved at 440 rpm and 40 mm/min tool velocities.

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“…However, since conventional welding tools were used, a poor surface finish was generally obtained in the aforementioned studies. Rehman et al [ 27 ] and Sheikh-Ahmad et al [ 28 ] managed to produce welds with an ultimate tensile strength that was greater than the yield strength of the parent material for the joining of 6 mm-thick HDPE with a conventional tool and a PTFE shoulder.…”

Section: Introductionmentioning

confidence: 99%

Joining of Polyethylene Using a Non-Conventional Friction Stir Welding Tool

et al. 2022

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The objective of the current study was to butt-weld 6 mm-thick polyethylene (PE) plates by friction stir welding (FSW) using a non-conventional stationary shoulder tool. The welds were performed with an unheated shoulder and with a shoulder temperature of 85 °C. Additionally, rotational speeds of 870, 1140 and 1500 rpm; welding speeds of 60 and 120 mm/min; and plunge depths of 5.5 and 5.7 mm were used. The influence of these parameters on morphology, hardness, ultimate tensile strength, elongation at break and fracture modes was evaluated. Shoulder heating proved to be crucial for the optimization of PE joints by FSW, as it clearly improved joint efficiency. Furthermore, shoulder heating promoted the reduction in internal and external defects, such as porosity and surface burning. Defect-free weld seams were obtained with higher rotational speeds and a lower welding speed. A maximum joint efficiency of about 97% was achieved with a shoulder temperature of 85 °C, a rotational speed of 1500 rpm, a welding speed of 60 mm/min and a plunge depth of 5.7 mm. A weld with the average joint efficiency of 92% was produced at 120 mm/min, which based on the literature found is the highest welding speed reported that achieved a joint efficiency above 90%.

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Effect of preheating on joint quality in the friction stir welding of bimodal high density polyethylene

Cited by 18 publications

References 15 publications

Optimization of joining HDPE rods by continuous drive friction welding

Optimization of joining HDPE rods by continuous drive friction welding

Effects of Noncontact Shoulder Tool Velocities on Friction Stir Joining of Polyamide 6 (PA6)

Joining of Polyethylene Using a Non-Conventional Friction Stir Welding Tool

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