A Study of Friction Stir Welding of High Density Polyethylene

Sheikh-Ahmad, Jamal; Ali, Dima; Jarrar, Firas; Deveci, Süleyman

doi:10.1115/msec2018-6318

Cited by 6 publications

(3 citation statements)

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“…Still, all welds presented residual depressions along the weld surfaces due to material shrinkage during cooling, a typical phenomenon on FSW of polymers. Similar observations were reported by Sheikh-Ahmad et al [ 22 ].…”

Section: Resultssupporting

confidence: 92%

“…Due to the poor thermal conductivity and low melting temperature of polymers, previous studies demonstrated that, typically, the conventional FSW tool is not suitable for welding polymers. The heat generated by a rotating shoulder is concentrated on the surface of the polymer, promoting material burning and heavy material projection, commonly known as flash defect [ 21 , 22 ]. Consequently, the tensile strength of welds produced by conventional FSW is normally reduced.…”

Section: Introductionmentioning

confidence: 99%

“…Consequently, the tensile strength of welds produced by conventional FSW is normally reduced. For example, Mishra et al [ 15 ] and Sheikh-Ahmad et al [ 22 ] achieved maximum joint efficiencies of 44% and 66%, respectively, for the butt-welding of high-density polyethylene (HDPE). In both cases, all welds presented internal and external defects, such as internal voids and surface burr.…”

Section: Introductionmentioning

confidence: 99%

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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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Section: Resultssupporting

confidence: 92%

Section: Introductionmentioning

confidence: 99%