Transient heat input model for friction stir welding using non-circular tool pin

León, J.; Jayakumar, V.

doi:10.5937/fmet2001137l

Cited by 8 publications

(4 citation statements)

References 24 publications

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“…The earlier studies carried out on the selection of tools suggested [18] that hexagonal shape tools provide efficient results after welding. So, in this research, hexagonal tools were selected to perform all the welding processes.…”

Section: Methodology Opted To Carried Out Experimentsmentioning

confidence: 99%

Parametric study to investigate mechanical properties of welded dissimilar Al6063 and Al 7073 alloys through FSW process

Singh,

Gautam,

Anand

et al. 2024

Eng. Res. Express

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Aluminium alloys have been the most prominent materials that have applications in every industry due to their high strength-to-weight ratio. The low melting point and easy recyclability also attract the scientific community to apply such material in modern manufacturing. The revolution in aluminium alloys came after the invention of friction stir welding, which provided high-end welding results and catastrophically increased its application in aerospace industries. Still, many inconclusive studies need to be explored for its high-end application, especially for newly invented aluminium alloy composites. Hence, this study investigates the application of friction stir welding process for welding dissimilar Aluminium alloy compositions. The investigation starts by analysing the effect of rotational speed, feed rate, and force on temperature generation, hardness, and welding strength. Three levels of process parameters, i.e. rotational speed in the range of 1000–1200 rpm, force of 12–18 N and feed rate of 40-60 mm/min, are selected to analyse the effect on hardness and strength of the weld. After analysis, the optimum conditions obtained were a rotational speed of 1200 rpm, a feed rate of 50 mm/min, and an average load of 18 N for a maximum hardness of 93.16 BHN and welding strength of 228 MPa. The investigation's findings indicated that several phenomena, including the effects of high blending activity, plastic disfigurement, the repercussions of grain structure, and frictional intensity, may influence the hardness and strength of the weld. The growth of uniform structure at the stirred area is caused by pin movement during welding, specifically from the retreating side to the advancing side.

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Section: Methodology Opted To Carried Out Experimentsmentioning

confidence: 99%

Parametric study to investigate mechanical properties of welded dissimilar Al6063 and Al 7073 alloys through FSW process

Singh,

Gautam,

Anand

et al. 2024

Eng. Res. Express

View full text Add to dashboard Cite

show abstract

“…A low feed rate can cause the production of groove defects to a very low level [36]. Furthermore, the feed rate is one factor that affects the workpiece's tensile strength in friction stir welding [37]. Based on this study, the suitable processing parameter for three types of pin profiles is a spindle speed of 1750 rpm at a feed rate of 30 mm/min.…”

Section: Tensile Strengthmentioning

confidence: 97%

Influence of tool pin profile on the mechanical strength and surface roughness of AA6061-T6 overlap joint friction stir welding

M.H. Osman,

Norfauzi Tamin

2023

JMES

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This study presents the tensile strength and surface roughness resulting from friction stir welding (FSW) on the lap joint method using AA 6061 –T6. FSW is conducted by comparing three different tool pin shapes: hexagon, thread, and square. Overlap welding using the FSW method is challenging if machine parameters, such as spindle speed and feed rate, are incompatible. The experiment was conducted using a conventional milling machine with a spindle speed of 1400 -1750 rpm and a feed rate of 20 – 30 mm/min. The results show that a spindle speed of 1750 rpm and a feed rate of 30 mm/min using a square tool pin results in 83.5088 MPa ultimate tensile strength and 0.85 µm surface roughness (Ra), which is much better than hexagon and thread type tool pins. In addition, the overall results on all three tool pin shapes show that higher processing parameters increase tensile strength and surface roughness. This study revealed the effect of parameters on AA6061 –T6 and the resulting implications of mechanical strength and surface roughness.

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“…2. From the previous studies [18,19], it is understood that there will be a minor difference in the temperature in the advancing and retreating side during the joining process. In order to consider the temperature difference, two thermocouples are placed in the advancing side and the other two are placed in the retreating side.…”

Section: Experiments Detailsmentioning

confidence: 99%

Experimental analysis on friction stir welding using flat-faced pins in AA2024-T3 plate

León¹,

Bharathiraja²,

Jayakumar³

2021

FME Transactions

Self Cite

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In friction stir welding, lesser tool life restricts the usage of non-circular pin in friction stir welding tool eventhough it delivers comparatively better weld joints than circular pin. Process peak temperature during the process affects the shear strength of the flowing material around the tool pin. Maintaining the process peak temperature as low as possible improves the properties in heat affected zone but on the other hand it increases the stress on the tool pin.Especially on the usage of non-circular pin, the pin surface experiences uneven stress distribution and causes premature tool failure. In this paper, optimum thermal environment through proper selection of process parameters and dwell period with respect to the pin geometry are analysed. A comparative analysis is also made to understand the impact of increase in flat surfaces in the pin surface on weld quality in the view of developing a suitable thermal environment that can improve tool life without compromising joint strength. Apart from this, optimum dwell period for the chosen tool pin geometry is analysed based on the empirical softening temperature of the material.

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Transient heat input model for friction stir welding using non-circular tool pin

Cited by 8 publications

References 24 publications

Parametric study to investigate mechanical properties of welded dissimilar Al6063 and Al 7073 alloys through FSW process

Parametric study to investigate mechanical properties of welded dissimilar Al6063 and Al 7073 alloys through FSW process

Influence of tool pin profile on the mechanical strength and surface roughness of AA6061-T6 overlap joint friction stir welding

Experimental analysis on friction stir welding using flat-faced pins in AA2024-T3 plate

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