Effect of pin profile and rotational speed on microstructure and tensile strength of dissimilar AA8011, AA01-T6 friction stir welded aluminum alloys

Palani, K.; Elanchezhian, C.; Ramnath, B. Vijaya; Bhaskar, G.B.; Naveen, E.

doi:10.1016/j.matpr.2018.10.248

Cited by 26 publications

(13 citation statements)

References 19 publications

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“…As stated in previous research that the formation of equiaxed fine grains does contribute to superior microhardness and improved mechanical properties [17,26]. Therefore, the results on average microhardness obtained would serve as a reference for comparisons between respective microstructures.…”

Section: Microstructure Analysismentioning

confidence: 70%

“…The tool geometry usually being optimized can be classified into two main features namely the shoulder surface and the pin profile [15,16]. The pin profile is responsible to provide plastic deformation of the material at the stir zones (SZ) and also thermomechanical affected zones (TMAZ) [17]. There are many pin profiles that have been used in previous FSP works such as cylindrical profiles [18] and polygonal profiles [15,19].…”

Section: Introductionmentioning

confidence: 99%

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Effect of Tool Pin Geometry on the Microhardness and Surface Roughness of Friction Stir Processed Recycled AA 6063

Liew

Chung

Teo

et al. 2021

Metals

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Friction stir processing was experimented on recycled aluminum alloy 6063 to investigate the effects of varying friction stir tool pin geometry and friction stir processing parameters on the microhardness and surface roughness. Different tool pin geometry has great influence on the outcome as it alters the ability to provide localized heating and better material flow. This study was performed using two different types of tool pin geometry, namely, the cylindrical threaded and the taper threaded pins, across varying rotational speeds and feed rates. The mechanical properties of the processed workpiece were inspected and analyzed in terms of microhardness, microstructure, and surface roughness. The results show that the taper threaded tool offers the highest improvement in microhardness up to 63% at the lowest rotational speed and highest feed rate at 1150 rpm and 30 mm/min, respectively, and this is supported by microscopy images showing finer grains with the compact and homogenous distribution. The taper threaded tool also provided a better surface roughness than the cylindrical threaded tool. However, the surface produced by cylindrical threaded at 30 mm/min feed rates is as smooth and consistent as that of taper threaded tool.

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Section: Microstructure Analysismentioning

confidence: 70%

Section: Introductionmentioning

confidence: 99%

Effect of Tool Pin Geometry on the Microhardness and Surface Roughness of Friction Stir Processed Recycled AA 6063

Liew

Chung

Teo

et al. 2021

Metals

View full text Add to dashboard Cite

show abstract

“…The preheating has been also proposed to be used to improve the material intermixing and thus the joint strength slightly. However, very large rotation speeds lead to numerous imperfections such as poor surface (flash), voids, porosity, tunneling, or formation of wormholes because of the excessive heat input [62,76,79,80]. Moreover, low welding speeds increase heat input and are associated with defects like tunneling [55,76,[80][81][82][83].…”

Section: Effect Of Tool Rotation and Welding Speedsmentioning

confidence: 99%

Advances in FSW and FSSW of dissimilar Al-alloy plates

Çam

Javaheri

Heidarzadeh

2022

Journal of Adhesion Science and Technology

105

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Numerous industrial applications, particularly those in the transport industry, require the joining of dissimilar materials which offers considerable benefits in terms of low cost, design flexibility, and weight reduction for overall structures. The problems associated with conventional fusion welding processes have stimulated researchers in recent years to develop new joining methods for dissimilar materials which are particularly difficult to join. Friction stir welding (FSW) originally developed for joining difficult-to-weld Al-alloys and FSSW (a variant of FSW for spot welding) have exhibited great potential for obtaining sound joints in various dissimilar alloy systems in different configurations namely butt-, lap-and spot-welding, particularly in dissimilar Al-alloys systems with different properties, which are very difficult to weld using conventional fusion welding techniques. A major difficulty in joining dissimilar Alalloys by FSW/FSSW lies in the discontinuity in mechanical and technological properties (such as high temperature strength, plastic deformation capacity, viscosity, etc.) of the materials to be welded across the abutting surfaces. This discontinuity as well as inherent asymmetry in heat generation and material flow of FWS/FSSW processes causes a higher asymmetry in materials flow behavior in dissimilar welding. However, it is relatively easier to implement the FSW/FSSW process to dissimilar Al-alloys in contrast to FSW of dissimilar materials combinations with very differing properties, such as Al-alloy to Mg-alloy or Al-alloy to steel.

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“…The interest in the use of aluminum alloys is based on appealing characteristics like high strength to weight ratio, appearance, higher ductility, and ease of fabrication [4], [5]- [7]. Various aluminum alloys behave differently due to the different alloying elements used to produce them [8] - [10]. However, it is a well-known fact that material improvements are very essential for better performance as well as for increasing the life span of components [11].…”

Section: Introductionmentioning

confidence: 99%

Al-Based Surface Composites and Strengthening Of Welded Joints Through Multi-Pass FSP Technique: A Review

2021

IJATCSE

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Friction stir processing (FSP) is a microstructural modifying technique that uses the same principles as the friction stir welding technique. FSP technique can be employed on the same surface repeatedly as desiredand this repetition is called multi-pass friction stir processing (MFSP). The recent developments have shown that MFSP technique is very useful towards uniform dispersion of reinforcement particles during fabrication of surface composites. Some studies have also demonstrated that MFSP technique can be employed on welded joints as a way of improving the mechanical properties of the welded joints. This paper reports on the progress made in using the multi-pass friction stir processing (MFSP) technique in producing aluminium-based surface composites. It further looks at the progress made in using the MFSP on aluminium-based welded joints. An effort is made to identify the gap that requires some exploration for the better utilization and understanding of this technique

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Effect of pin profile and rotational speed on microstructure and tensile strength of dissimilar AA8011, AA01-T6 friction stir welded aluminum alloys

Cited by 26 publications

References 19 publications

Effect of Tool Pin Geometry on the Microhardness and Surface Roughness of Friction Stir Processed Recycled AA 6063

Effect of Tool Pin Geometry on the Microhardness and Surface Roughness of Friction Stir Processed Recycled AA 6063

Advances in FSW and FSSW of dissimilar Al-alloy plates

Al-Based Surface Composites and Strengthening Of Welded Joints Through Multi-Pass FSP Technique: A Review

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