Influence of tool geometry on material flow and mechanical properties of friction stir welded Al-Cu bimetals

Beygi, R.; Mehrizi, M. Zarezadeh; Verdera, D.; Loureiro, A.

doi:10.1016/j.jmatprotec.2018.01.033

Cited by 49 publications

(23 citation statements)

References 26 publications

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“…Beygi et al used different tool pin profiles to obtain Al-Cu bimetal joint and found that the threaded taper tool provides the best results. It is difficult to get the high value of joint efficiency due to the presence of micro voids [10]. Galvão et al carried out dissimilar Al-Cu welding by considering the impact of tool rotational speed and plate position in the material flow.…”

Section: Introductionmentioning

confidence: 99%

Joint strength evaluation of friction stir welded Al-Cu dissimilar alloys

et al. 2019

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Friction stir welding has been successfully employed to fabricate dissimilar thickness AA1050 and oxygen free copper (Cu-OF).The highest value of the joint tensile strength obtained was 91% of the AA1050 alloy strength with the tensile fracture path on the aluminum side. At the Al-Cu interfacial microstructure, a layer of Al4Cu9 and Al2Cu intermetallic compounds (IMCs) with thickness of 2.2 μm to 0.26 μm was developed at different welding speeds. The voluminous IMCs have an adverse impact on the tensile characteristics of the joint. The IMCs (0.26 μm -0.77 μm) at welding speeds of 160 mm/min and 213 mm/min with 1 mm tool offset, has trivial effect on the tensile property. The mechanical property of the joint was significantly affected by the tool offset and welding speed. Image processing techniques such as Gaussian blur, histogram normalization and binarisation were utilized to understand the distribution of copper in the weld stir zone.

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Section: Introductionmentioning

confidence: 99%

Joint strength evaluation of friction stir welded Al-Cu dissimilar alloys

et al. 2019

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“…12 The threaded conical tool gives better material flow with fewer defects and higher weld strength. 13 Better weld quality with fewer defects can be obtained with higher rotation speed and lower weld speed. 14 High-quality defectfree Al-Cu weld can be produced with offsetting tool to softer Al side.…”

Section: Introductionmentioning

confidence: 99%

Multi-response optimization of friction stir welding process of dissimilar AA3003-H12 and C12200-H01 alloys using full factorial method

Shinde

Arakerimath

2021

Proceedings of the Institution of Mechanical Engineers, Part E:

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In current research work, an attempt has been made to join dissimilar metals by employing friction stir welding (FSW), i.e., AA3003-H12 (aluminium alloy) and C12200-H01 (copper alloy). The experiments are designed as per full factorial design at different process parameters, namely tool pin profiles, rotational speed, welding speed, and shoulder diameter while the ultimate tensile strength (UTS), yield strength (YS), and percentage elongation (% E) are considered as a performance parameter. Moreover, a statistical tool, i.e., analysis of variance (ANOVA) is also utilized to check the adequacy of the results. It is observed that the higher UTS, % E and YS are obtained by employing a taper pin profile tool at a rotational speed of 1800 rpm, a welding speed of 16 mm/min, and a shoulder diameter of 22.5 mm. The ANOVA results showed that the rotational speed is the most significant factor for current research work. In addition, a scanning electron microscope is utilized for microstructural analysis of welded joints. It is witnessed that the minimum grain size, i.e., 4 microns, is obtained for highest strength specimen and the maximum grain size is obtained for the lowest strength specimen i.e., 31 microns. Besides this, the swirling of cu particle is also observed from advancing side (AS) to the retreating side (RS). Moreover, energy-dispersive X-ray spectroscopy (EDS) indicates the formation of intermetallic compounds i.e. Al2Cu, Al9Cu4 at nugget zone (NZ). The hardness is found to be higher at NZ due to the presence of Al-Cu intermetallic.

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“…e material near the stir tool were plasticized by the friction heat and forced to mix with each other [11]. At present, FSW has successfully achieved heterogeneous metals such as Al-Mg [12,13], Al-Steel [14,15], Al-Ti [16], and Al-Cu [17][18][19][20][21][22][23]. A large number of related researches on Al-Cu FSW joints have been carried out.…”

Section: Introductionmentioning

confidence: 99%

“…A large number of related researches on Al-Cu FSW joints have been carried out. e investigation is mainly aimed at the effects of the parameters on microstructure, performance of joints [17][18][19][20], and formation mechanism of the interface IMCs [21][22][23]. In [18,19], the influence of plate position, rotational speed, and offset on mechanical properties and microstructures of the Al-Cu FSW joints is studied.…”

Section: Introductionmentioning

confidence: 99%

“…e study on the temperature field distribution and the evolution of IMCs showed that solid phase transformation and solidification transformation were the main formation mechanisms of IMCs [21]. Beygi et al [23] found the threaded conical tool provided the best compromise between the different material flow regions. Although a large number of related researches on Al-Cu FSW joints have been carried out, there are relatively few studies on the conductivity of the joints.…”

Section: Introductionmentioning

confidence: 99%

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Microstructure and Conductivity of the Al‐Cu Joint Processed by Friction Stir Welding

Wei

Zou

2020

Advances in Materials Science and Engineering

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In this paper, 1060 aluminum and T2 pure copper were joined by friction stir welding. The influence of the rotation speed and inclination on the microstructure and mechanical properties of the joint were investigated. The microstructure and composition of the welded interface region were analyzed. The joints’ strength was tested, and the conductivity of the joints was estimated. Joints having good surface formation and defect-free cross section were successfully obtained. The cross-sectional morphologies of the Al-Cu friction stir welding joints can be divided into three zones: the shoulder impact zone, the weld nugget zone, and the interface zone. The interface zone consisted of a metallurgical reaction layer and a visible mixed structure. The reaction layers were identified as Al2Cu, Al4Cu9 phases. The tensile strength of the joints reaches maximum values of 102 MPa at a rotation speed of 950 rpm and inclination of 0°, which was approximately equal to those of 1060Al base metal. The resistivity of the Al-Cu joint was approximately equal to the theoretical resistivity. The interfacial resistance is directly affected by the joint defects, compound types, and thickness of the intermetallic compound layer.

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Influence of tool geometry on material flow and mechanical properties of friction stir welded Al-Cu bimetals

Cited by 49 publications

References 26 publications

Joint strength evaluation of friction stir welded Al-Cu dissimilar alloys

Joint strength evaluation of friction stir welded Al-Cu dissimilar alloys

Multi-response optimization of friction stir welding process of dissimilar AA3003-H12 and C12200-H01 alloys using full factorial method

Microstructure and Conductivity of the Al‐Cu Joint Processed by Friction Stir Welding

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