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 54 publications

(11 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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“…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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“…The size and designs of shoulder and pin (commonly referred to as tool design) have a significant effect on heat input and material movement. The study conducted by Vijayavel et al [8] revealed the fluctuations in the tensile strength and hardness of the friction stir processed material because of the variation in the shoulder diameters to pin diameter (D/d) ratio, and this was further linked with associated microstructural changes. Similarly, the research conducted by Khan et al [9] stated that a D/d ratio of 2.6 gives the maximum tensile strength, whereas a D/d ratio of 2.8 results in the minimum tensile strength and microstructures showed grain refinement in the zone where the material is mixed through stirring action (known as stir zone) due to dynamic recrystallization during FSW.…”

Section: Introductionmentioning

confidence: 99%

Investigation on the Effect of Tool Pin Profiles on Mechanical and Microstructural Properties of Friction Stir Butt and Scarf Welded Aluminium Alloy 6063

Goel¹,

Siddiquee

Khan

et al. 2018

Metals

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Abstract:In the present study, friction stir welding (FSW) of butt and scarf joints of Al 6063-T6 were investigated. Five different tool pin profiles (cylindrical, tapered cylindrical, square, triangular, and hexagonal) were applied for performing welding. Scarf joint, being a new joint configuration, was used and effect of pin profiles was investigated on this type of joint configuration. The effect of pin profiles on microstructure, micro-hardness, impact and tensile properties of friction stir welded Al 6063-T6 was investigated. Scanning electron and optical microscopy were employed to characterize the different zones of welded joints. A thorough discussion on correlation between mechanical properties and microstructure has been made. In addition, the formation of various defects during the FSW was discussed with the help of fractography of the fractured surfaces.

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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 54 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

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

Investigation on the Effect of Tool Pin Profiles on Mechanical and Microstructural Properties of Friction Stir Butt and Scarf Welded Aluminium Alloy 6063

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