Tensile properties of friction stir welding of thermoplastic pipes based on a novel designed mechanism

Mosavvar, Amir; Azdast, Taher; Moradian, Milad; Hasanzadeh, Rezgar

doi:10.1007/s40194-018-00698-6

Cited by 19 publications

(16 citation statements)

References 16 publications

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“…Some other parameters which have been identified to significantly affect (>5% contribution) the joint tensile strength are: axial force, tool diameter, tilt angle, and tool temperature. Apart from sheets, Mosavvar et al [127] have studied butt-joint FSW of HDPE pipes using the threaded cylindrical pin. The reported ranking order for the yield strength is: rotational speed, tool offset (used as tilt angle in FSW of sheets), and traverse speed.…”

Section: Statistical-based Studiesmentioning

confidence: 99%

“…Vakili-Tahami et al [123] have studied the creep behavior and have optimized the creep lifetime of friction stir-welded PMMA pipes. Mosavvar et al [127] have studied butt-joint FSW of HDPE pipes using a threaded cylindrical pin. The rotational speed was varied in a 1500-2500 rpm range, traverse speed in 110-150 mm/min range, and tool offset in 2.5-4.5 mm range.…”

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confidence: 99%

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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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Section: Statistical-based Studiesmentioning

confidence: 99%

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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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“…Arici et al [28] proved the suitability of double pass LFSW on polyethylene (PE) sheets with the aim of eliminating the root defect. surface and internal flow of ABS/PC dissimilar LFSW joint [27] and (c) digital image of HDPE pipe joint after LFSW [29].…”

Section: Materials Flowmentioning

confidence: 99%

Friction Stir Welding and Friction Spot Stir Welding Processes of Polymers—State of the Art

2020

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In the last decade, the friction stir welding of polymers has been increasingly investigated by the means of more and more sophisticated approaches. Since the early studies, which were aimed at proving the feasibility of the process for polymers and identifying suitable processing windows, great improvements have been achieved. This owes to the increasing care of academic researchers and industrial demands. These improvements have their roots in the promising results from pioneer studies; however, they are also the fruits of the adoption of more comprehensive approaches and the multidisciplinary analyses of results. The introduction of instrumented machines has enabled the online measurement of processing loads and temperature, and critical understanding of the principal aspects affecting the material flow and welds quality. Such improvements are also clearly demonstrated by the increase of the strength of recent joints (up to 99% of joining efficiency) as compared to those reached in early researches (almost 47%). This article provides a comprehensive review of the recent progresses on the process fundamentals, quality assessment and the influence of process parameters on the mechanical behavior. In addition, emphasis is given to new developments and future perspectives.

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“…Lim et al 21 investigated mechanical properties of steel pipes welded by hybrid FSW + root arc weld approach. Mosavvar et al 22 welded thermoplastic cylinders using FSW method and studied the tensile properties of manufactured cylinders. Khourshid and Sabry 23 also welded two similar aluminium 6063 pipes using a fixed traverse speed but with different rotation speeds and showed that elongation, hardness and ultimate strength values are increased by increasing the rotation speed and the best mechanical properties were obtained at 1400 RPM and 4 mm/min of tool speeds.…”

Section: Introductionmentioning

confidence: 99%

“…Indeed, for each type of geometry, material and welding position, especial FSW tool and fixture are required, and this issue is considered as a major limitation of FSW technique. Accordingly, different fixtures have been utilized in recent years to join pipes, thin cylinders and tubes in butt and lap welding position 19–25 . In addition to the well‐known parameters and basic characteristic specifications such as tensile and ultimate strength, hardness and microstructure studies, study of fracture and crack growth resistance in cylinders fabricated by the orbital FSW method is an important issue, because such pipes and thin cylindrical shells can be subjected to complex fatigue and variable loads during their service life, and therefore, good fracture toughness and high resistance against crack growth are key parameters that should be achieved for a high‐quality orbital FSW product.…”

Section: Introductionmentioning

confidence: 99%

Mechanical and fracture properties of aluminium cylinders manufactured by orbital friction stir welding

Aliha

Ghoreishi

Imani

et al. 2020

Fatigue Fract Eng Mat Struct

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Butt welding of AA6063 aluminium cylindrical shells was performed using the orbital friction stir welding (FSW) method. Tool rotation speed and orbital speed (i.e., traverse speed of rotating cylinder during welding) were considered as variable, and the strength and the mechanical properties including tensile strength, microhardness, mode I fracture energy and mode I crack growth behaviour of manufactured cylinders were investigated experimentally. A novel and subsized test specimen was designed and manufactured for fracture testing of specimens extracted from both base metal and weld zone region of cylinders. The initial precrack was introduced along (i) the tool penetration through the pipe thickness (i.e., T-direction) and (ii) along the tool travelling direction (i.e., L-direction). It was found that the crack growth resistance and fracture energy values of FSW samples are greater than the corresponding values of base aluminium material along both "L"and "T"-directions. Also, the fracture resistance value in T-direction was higher than the L-direction for the whole tested FSW samples with different welding speeds. K E Y W O R D Scylinder butt joining, mechanical and microstructure properties, novel mode I fracture test specimen, orbital FSW, welding speeds

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Tensile properties of friction stir welding of thermoplastic pipes based on a novel designed mechanism

Cited by 19 publications

References 16 publications

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

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

Friction Stir Welding and Friction Spot Stir Welding Processes of Polymers—State of the Art

Mechanical and fracture properties of aluminium cylinders manufactured by orbital friction stir welding

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