Assessment Of Joints Using Friction Stir Welding And Refill Friction Stir Spot Welding Methods

Lacki, P.; Więckowski, W.; Wieczorek, P.

doi:10.1515/amm-2015-0377

Cited by 22 publications

(13 citation statements)

References 8 publications

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“…In order to verify the hypothesis of the variance repeatability, a G coefficient was determined: (8) Which was compared to the critical value based on the accepted significance level of α = 0.05 and the number of degrees of freedom determined based on the relationship: f 1 = N = 9 (9) f 2 = r − 1 = 2 (10) where: r -the number of parallel measurements…”

Section: Results and Analysismentioning

confidence: 99%

“…On the other hand, research regarding the spot welding of AA3003H11 aluminum sheet metal conducted by Mumin Tutar [14] shows that all of the initial parameters of the process including rotational speed n, tool dive depth g, and welding time t have a significant effect on the process. Thus, it is impossible to unambiguously decide what the optimal values of the initial parameters of the process are because they depend on the type of material, thickness of the joined sheets, and type and condition of the tool [3,9,11,13]. The goal of the research was to develop a mathematical model of the effect of initial parameters of the RFSSW method on the load carrying capacity of lap joints on 7075-T6 aluminum sheet metal, which is widely used in aircraft structures.…”

Section: Introductionmentioning

confidence: 99%

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The Effect of RFSSW Parameters on the Load Bearing Capacity of Aluminum 7075-T6 Sheet Metal Joints

Kluz¹,

Trzepieciński²,

Wydrzyński³

2018

Adv. Sci. Technol. Res. J.

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Friction Stir Spot Welding is one of the most contemporary methods of joining metals and alloys in their solid state. The ability to join elements made of aluminum alloys allows for utilizing this method in the manufacturing of aircraft structures while lowering the work load, costs, and weight, without sacrificing or even having better strength parameters than classic methods of joining elements. It ensures constant joint parameters, however it requires the use of optimal welding parameters such as: the rotational speed of the tool, tool delve depth, and welding time. The work presents the results of experiments conducted on 7074 aluminum sheet metal that was 1.8 and 0.8 mm thick, which conducted in accordance with the PS/DK32 research plan. The welding tests were done on a dedicated spot welding machine, while the strength tests consisted of static tensile strength tests. In the final part of the article contains an analysis and interpretation of the results.

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Section: Results and Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

The Effect of RFSSW Parameters on the Load Bearing Capacity of Aluminum 7075-T6 Sheet Metal Joints

Kluz¹,

Trzepieciński²,

Wydrzyński³

2018

Adv. Sci. Technol. Res. J.

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“…The specimens were further tested for internal defects and flaws using the radiography testing method. This method is a non-destructive method used for the detection of certain volumetric defects due to improper parameters, internal weld information and material flow (Lacki et al, 2015). The ultimate tensile strength (UTS), percentage (%) elongation and yield strength (YS) of the welded coupons were determined using computer-controlled universal testing machine as displayed in Figure 3(d) at 5 mm/min crosshead speed.…”

Section: Testing Tools and Methodsmentioning

confidence: 99%

Design-of-experiments application in the friction stir welding of aluminium alloy AA 8011-h14 for structural application

Khanna

Bharati

Sharma

et al. 2019

MMMS

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Purpose The demand for aluminium alloys has been increasing in almost all the fields. In this study, the friction stir welding (FSW) of similar aluminium alloy AA 8011-h14 has been presented using three levels of tool rotational speed (n), tool tilt angle (ϴ) and tool feed (f). The purpose of this paper is to study the effect of welding parameters on various properties and time-temperature plots. Design/methodology/approach FSW was carried out using the L-9 orthogonal array of welding parameters generated using the Taguchi approach. Visual inspection and radiography testing were conducted to detect the surface and volume defects, respectively. Taguchi analysis was carried out to get optimised welding parameters for tensile testing. The microstructural analysis was carried out for the specimen possessing maximum tensile strength and the obtained grain structures were compared with the microstructure results of the base material. The peak process temperatures were noted and time-temperature plots were analysed for the varying parameters. The maximum value of hardness was recorded and analysed. Findings Visual inspection and radiography testing confirmed defect-free joints. The maximum tensile strength achieved was 84.44 MPa with 64.95 per cent efficiency. The optimised parameters obtained using Taguchi analysis for tensile testing were 1,500 rpm, 1° and 50 mm/min. Microstructure analysis for the specimen possessing maximum tensile strength revealed fine and equiaxed grains in the nugget zone. Time-temperature plots suggested the maximum temperature of 389 °C on the advancing side. A maximum hardness value of 36.4 HV was obtained in the nugget zone. Originality/value As per the knowledge of the authors, this study is the first attempt for the detailed experimental analysis on the FSW of this particular aluminium alloy AA 8011-h14.

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“…As reported in [13,14], waste products of tool wear, which are transferred to the weld, lead to defects and deterioration of joint quality. Therefore, tool life, expressed by the time of its operation or the weld length, is strongly dependent on these factors and corresponds to a given set of welding process parameters.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Usefulness of AlCrN Coatings for Increased Life of Tools Used in Friction Stir Welding (FSW) of Sheet Aluminum Alloy

et al. 2020

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The study presents the results of examinations of wear in tools made of 1.2344 steel without and with an anti-wear coating in the process of welding overlap joints of sheet metal made of 7075-T6 aluminum alloy using friction stir welding (FSW) technology. A commercial anti-wear AlCrN coating (Balinit® Alcrona Pro by Oerlikon Balzers Coating Poland Sp. z o.o., Polkowice, Poland) was examined, applied using physical vapor deposition (PVD) and used to improve tool life in metalworking processes. Wear tests for the tools were conducted in industrial conditions at specific parameters of the friction stir welding process. Tool wear was evaluated through examination of the tool working surface. The results of the static tensile strength tests and metallographic examinations of the joints were used to evaluate the effect of tool wear and the coating impact on joint quality. The results obtained in the study show that the tool made of 1.2344 steel was intensively worn after the welding of a joint with the length of 200 m, increasing the risk associated with further use of the tool and suggesting the tool’s low durability. The use of the AlCrN coating led to an increase in tool life. The coating limits the process of tool wear and can be used as an anti-wear coating for tools used in the FSW of aluminum alloys.

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Assessment Of Joints Using Friction Stir Welding And Refill Friction Stir Spot Welding Methods

Cited by 22 publications

References 8 publications

The Effect of RFSSW Parameters on the Load Bearing Capacity of Aluminum 7075-T6 Sheet Metal Joints

The Effect of RFSSW Parameters on the Load Bearing Capacity of Aluminum 7075-T6 Sheet Metal Joints

Design-of-experiments application in the friction stir welding of aluminium alloy AA 8011-h14 for structural application

Evaluation of Usefulness of AlCrN Coatings for Increased Life of Tools Used in Friction Stir Welding (FSW) of Sheet Aluminum Alloy

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