Effect of shoulder diameter to pin diameter (D/d) ratio on tensile strength and ductility of friction stir processed LM25AA-5% SiCp metal matrix composites

Vijayavel, P.; Balasubramanian, V.; Sundaram, S.

doi:10.1016/j.matdes.2013.12.008

Cited by 59 publications

(13 citation statements)

References 17 publications

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“…The analogous observation was made by Kumar et al 46 on the existence of a critical shoulder diameter for a given diameter of the pin to obtain void-free weld. A comparable observation was made by Vijayavel et al 47 while investigating the effect of shoulder diameter to pin diameter (D/d) ratio on tensile strength and ductility of friction stir processed samples. The material of examination was metal matrix composites (LM25AA-5% SiCp).…”

Section: Resultssupporting

confidence: 79%

Understanding the effect of tool geometrical aspects on intensity of mixing and void formation in friction stir process

Malik

Kailas

2020

Proceedings of the Institution of Mechanical Engineers, Part C:

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The reduction of agglomeration of particulate reinforcement in friction stir processing and elimination of joint line remnant in friction stir welding depends on stirring ability of friction stir tool. The magnitude of stirring is indicated by the intensity of material inter-mixing in tool interacted region. Present investigations analyse the influence of geometrical aspects of classical friction stir tool on the intensity of material intermixing, location of high stir regions and void formation during the steady-state phase of friction stir welding. The classical tool was chosen as its geometrical features undergo minimal wear in the harsher processing environment. Investigating material mixing using metallic inserts have their shortcomings due to different flow properties of insert/marker and parent material. Therefore, bi-colour plasticine configuration possessing primary colours was adopted to understand the level of intermixing. The hue attribute of the generated secondary colour was utilised to identify and quantify material mixing. Experimental results revealed that the pin diameter positively influenced mixing and negatively affected void formation. Shoulder size and pin taper angle aided in the closure of void with inferior mixing. The intensity of mixing enhances on selection of tools possessing a shoulder to pin diameter ratio of 2.5. Finite element simulation studies were conducted to understand the reasons for mixing under certain tooling conditions. Since material subjected to stirring is concentrated primarily on a portion of advancing side, components of shear strain, shear strain rates, shear stress and velocity were tracked for this portion of processed material during its interaction with tool pin for one complete rotation.

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Section: Resultssupporting

confidence: 79%

Understanding the effect of tool geometrical aspects on intensity of mixing and void formation in friction stir process

Malik

Kailas

2020

Proceedings of the Institution of Mechanical Engineers, Part C:

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“…Along with this, the ratio of shoulder diameter to pin diameter (D/d), and the ratio of shoulder to thickness of work material (D/t) should be considered to acquire better welds. 57,58 Flat, convex and concave were regularly used shoulder shapes whereas straight cylindrical, tapered cylindrical, threaded cylindrical, square and cone are the most commonly used pin profile. The taper cylindrical pin profiles are basically considered with two different folds and are illustrated in Figure 8.…”

Section: Tool Shape and Designmentioning

confidence: 99%

Friction stir welding of dissimilar alloy combinations—A Review

ShivaKumar

Rajamurugan

2022

Proceedings of the Institution of Mechanical Engineers, Part C:

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Friction stir welding (FSW) is one among solid-state welding processes that can be employed for producing joints between dissimilar combinations with more ease than that of fusion welding processes. Several high coupled physical phenomena have addressed FSW as an extremely complex process. It is around three decades of invention, optimization of the parameters have been carried out even today by many researchers all over the world to obtain sound joints. This article focuses mainly on the research developments in the dissimilar FSW (DFSW), with the factors that are involved in joint fabrication between dissimilar materials. From the literature, it is found that the most influential factors in deciding the quality of the joints are pin profile, shoulder shape, welding speed and tool rotational speed. In addition, all other parameters will provide incremental support to it. The study on microstructure in different zones and the mechanical properties of welded specimens are elaborated from the available literature. Special attention is given to the reinforcement of micro- and nano- sized solid particles in the DFSW process. Future studies of DFSW are discussed based on the untracked studies that are not available in the literature.

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“…By increasing tool shoulder diameter, the friction heat generation will increase due to increase in contact area. 24 The tensile properties of the weld for different pin and shoulder diameters were shown in Figure 9. From this figure, the welds fabricated by the tools with shoulder diameter of 18 mm (D/d ¼ 3) have shown superior tensile properties compared to the joints welded by the tools with shoulder diameter of 16 mm and 20 mm.…”

Section: Effect Of Pin and Shoulder Diameters On The Tensile Propertiesmentioning

confidence: 99%

Effect of tool parameters on mechanical properties, temperature, and force generation during FSW

Akbari

Aliha

Keshavarz

et al. 2016

Proceedings of the Institution of Mechanical Engineers, Part L:

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The welding tool parameters play a critical role in obtaining weld strength during friction stir welding. In this investigation, the effect of welding tool parameters such as pin and shoulder diameter and pin height on the axial and traverse forces and also temperature of welding of AA5083 alloy was investigated. A specially designed dynamometer was used to measure the welding tool forces. Then, the mechanical properties of the welds were characterized using tensile tests. Moreover, macrostructure of welds was investigated in order to analyze weld quality. Finally, optimum values for shoulder diameter, pin height and pin diameter were determined.

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Effect of shoulder diameter to pin diameter (D/d) ratio on tensile strength and ductility of friction stir processed LM25AA-5% SiCp metal matrix composites

Cited by 59 publications

References 17 publications

Understanding the effect of tool geometrical aspects on intensity of mixing and void formation in friction stir process

Understanding the effect of tool geometrical aspects on intensity of mixing and void formation in friction stir process

Friction stir welding of dissimilar alloy combinations—A Review

Effect of tool parameters on mechanical properties, temperature, and force generation during FSW

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