Application of friction stir welding for several plastic materials

“…It should also be mentioned that the joint efficiency is dependent upon the hardness reduction ratio; the more the decrease in hardness at the weld center, the lesser the joint efficiency. 27,10 The concept of making surface composites by FSP can be coupled with FSW of polymers with the objective of further improving the joint efficiency by minimizing the hardness reduction ratio. 28…”

Section: Resultsmentioning

confidence: 99%

On the friction stir welding, tool design optimization, and strain rate-dependent mechanical properties of HDPE–ceramic composite joints

Raza

Shamir

Qureshi

et al. 2017

Journal of Thermoplastic Composite Materials

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Friction stir welding is a recently developed technique for joining low-melting metals and polymers. In the present work, friction stir welded joints of high-density polyethylene (HDPE) sheets were produced using a newly designed tool with a concave shoulder and a grooved conical pin. The joints were produced with and without the additions of ceramic particulates including silicon carbide (SiC), alumina, graphite, and silica. The effect of strain rate on the tensile properties of base material and plain welded joints was examined. In addition to tensile properties of composite joints, hardness profiles across the weld nugget were analyzed. It was observed that the increasing strain rate improved both the tensile strength and the ductility of the plain welded joints. The tool was able to yield a joint efficiency of around 84% in the plain welded samples. Although, in terms of joint efficiency, the composite joints were less efficient than the plain welded HDPE, SiC additions were found to yield better material properties relative to other reinforcements. Finally, it was concluded that an SiC–HDPE composite joint can be of practical importance in high strain rate applications, provided the optimum tool design and stir welding parameters are available.

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“…They have suggested that a better joint with superior properties and less defects is achieved when the thread flute and pin rotation are not in the same directions, so, for a right-hand threaded pin with clockwise rotation or a left-hand threaded pin with anticlockwise rotation. Inaniwa et al [111] have studied HDPE, polyamide-6, and polyvinyl chloride. They have shown that the joint strength of the materials increases with decreasing revolution pitch (revolution pitch = traverse speed/rotational speed), and that the suitable value of the revolution pitch increases with low melt viscosity materials.…”

Section: Butt-joint Configurationmentioning

confidence: 99%

A Comprehensive Review on Optimal Welding Conditions for Friction Stir Welding of Thermoplastic Polymers and Their Composites

et al. 2021

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Friction stir welding (FSW) and friction stir spot welding (FSSW) techniques are becoming widely popular joining techniques because of their increasing potential applications in automotive, aerospace, and other structural industries. These techniques have not only successfully joined similar and dissimilar metal and polymer parts but have also successfully developed polymer-metallic hybrid joints. This study classifies the literature available on the FSW and FSSW of thermoplastic polymers and polymer composites on the basis of joining materials (similar or dissimilar), joint configurations, tooling conditions, medium conditions, and study types. It provides a state-of-the-art and detailed review of the experimental studies available on the FSW and FSSW between similar thermoplastics. The mechanical properties of FSW (butt- and lap-joint configurations) and FSSW weld joints depend on various factors. These factors include the welding process parameters (tool rotational speed, tool traverse speed, tool tilt angle, etc.), base material, tool geometry (pin and shoulder size, pin profile, etc.) and tool material, and medium conditions (submerged, non-submerged, heat-assisted tooling, cooling-assisted tooling). Because of the dependence on many factors, it is difficult to optimize the welding conditions to obtain a high-quality weld joint with superior mechanical properties. The general guidelines are established by reviewing the available literature. These guidelines, if followed, will help to achieve high-quality weld joints with least defects and superior mechanical properties. Apart from parametric-based studies, the statistical-based studies (e.g., analysis of variance (ANOVA)-based studies) are covered, which helps with the determination of the influential parameters that affect the FSW and FSSW weld joint strength. Also, the optimal ranges of the most influential process parameters for different thermoplastic materials are established. The current work on the development of general guidelines and determination of influential parameters and their operating ranges from published literature can help with designing smart future experimental studies for obtaining the global optimum welding conditions. The gaps in the available literature and recommendations for future studies are also discussed.

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Application of friction stir welding for several plastic materials

Cited by 40 publications

References 13 publications

Induction heated tool assisted friction-stir welding (i-FSW): A novel hybrid process for joining of thermoplastics

Induction heated tool assisted friction-stir welding (i-FSW): A novel hybrid process for joining of thermoplastics

On the friction stir welding, tool design optimization, and strain rate-dependent mechanical properties of HDPE–ceramic composite joints

A Comprehensive Review on Optimal Welding Conditions for Friction Stir Welding of Thermoplastic Polymers and Their Composites

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