Analysis of the mechanical properties and of micrographs of refill friction stir spot welded 7075-T6 aluminium sheets

• Autorzy: Kubit A. , Kluz R. , Trzepieciński T. , Wydrzyński D. , Bochnowski W.

Identyfikatory

DOI

10.1016/j.acme.2017.07.005

• Języki publikacji: EN

Abstrakty

EN

The main aim of the investigations was to determine the significance of parameters of RFSSW for the strength parameters of the resulting joint. RFSSW joints were made in 0.8-mm-thick 7075-T6 aluminium alloy using different welding parameters (tool rotational speed v, tool plunge depth, and joining time). The load capacity of joints was determined by shear tests. The optimum welding parameters which assure the highest load capacity (4.09 kN) in the tensile/shear test are: tool rotational speed of 3000 rpm, tool plunge depth of 1.55 mm, and joining time of 1.25 s. In the conditions of the static tensile test under pure shear the highest joint capacity (6.48 kN) is found for the joint welded at a tool plunge depth of 1.7 mm. Depending on the tool plunge depth, three types of joint damage were observed during tensile/shear tests: plug type fracture, shear fracture, and plug-shearracture. Incomplete refill is the main weld defect observed which is located on the path along which the sleeve plunges into the sheet. It was also found that alclad between the upper and lower sheets worsens the joint quality between the stir zone and thermo-mechanically affected zone.

Słowa kluczowe

EN

AA7075-T6 alloy; RFSSW; microstructures; tensile shear properties

PL

mikrostruktury; rozciąganie; wytrzymałość materiałów

• Wydawca: Springer ; Wrocław University of Science and Technology
• Czasopismo: Archives of Civil and Mechanical Engineering
• Rocznik: 2018
• Tom: Vol. 18, no. 1
• Strony: 235--244
• Opis fizyczny: Bibliogr. 12 poz., rys., tab., wykr

Twórcy

autor

Kubit A.

• Department of Manufacturing and Production Engineering, Rzeszow University of Technology, 8 Powst. Warszawy Ave., 35-959 Rzeszów, Poland

autor

Kluz R.

• Department of Manufacturing and Production Engineering, Rzeszow University of Technology, 8 Powst. Warszawy Ave., 35-959 Rzeszów, Poland

autor

Trzepieciński T.

• Department of Materials Forming and Processing, Rzeszow University of Technology, 8 Powst. Warszawy Ave., 35-959 Rzeszów, Poland

autor

Wydrzyński D.

• Department of Manufacturing and Production Engineering, Rzeszow University of Technology, 8 Powst. Warszawy Ave., 35-959 Rzeszów, Poland

autor

Bochnowski W.

• Department of Mathematics and Natural Sciences, University of Rzeszow, 1 Pigonia St., 35-310 Rzeszów, Poland

Bibliografia

• [1] Z. Zhang, X. Yang, J. Zhang, G. Zhou, X. Xu, B. Zou, Effect of welding parameters on microstructure and mechanical properties of friction stir spot welded 5052 aluminum alloy, Materials and Design 32 (8–9) (2011) 4461–4470.
• [2] T. Iwashita, Method and apparatus for joining, U.S. patent no. 6601751 B2 (2003).
• [3] Z. Shen, X. Yang, Z. Zhang, L. Cui, T. Li, Microstructure and failure mechanisms of refill friction stir spot welded 7075-T6 aluminum alloy joints, Materials and Design 44 (2013) 476– 486.
• [4] C. Oberembt, C. Allen, W. Arbegast, A. Patnaik, Screening for process variable sensitivity in refill friction spot welding of 6061 aluminium sheet, in: R.S. Mishra, M.W. Mahoney, T.J. Lienert, K.V. Jata (Eds.), Friction Stir Welding and Processing IV, The Minerals, Metals and Materials Society, Pittsburgh, (2007) 359–368.
• [5] Z. Shen, Y. Ding, J. Chen, A.P. Gerlich, Comparison of fatigue behavior in Mg/Mg similar and Mg/steel dissimilar refill friction stir spot welds, International Journal of Fatigue 92 (1) (2016) 78–86.
• [6] P. Lacki, W. Więckowski, P. Wieczorek, Assessment of joints using friction stir welding and refill friction spot welding methods, Archives of Metallurgy of Materials 60 (3) (2015) 2297–2306.
• [7] AMS-QQ-A-250/13, Aluminum Alloy Alclad 7075, Plate and Sheet, 2007.
• [8] Y. Chen, J. Chen, B. Shalchi Amirkhiz, M.J. Worswick, A.P. Gerlich, Microstructures and properties of Mg alloy/DP600 steel dissimilar refill friction stir spot welds, Journal of Science and Technology of Welding and Joining 20 (5) (2015) 494–501.
• [9] Z. Shen, X. Yang, S. Yang, Z. Zhang, Y. Yin, Microstructure and mechanical properties of friction spot welded 6061-T4 aluminium alloy, Materials and Design 54 (2014) 766–778.
• [10] DIN EN ISO 14273, Specimen Dimensions and Procedure for Shear Testing Resistance Spot, Seam and Embossed Projection Welds, 2000.
• [11] L. Fratini, S. Pasta, Fatigue resistance of AA2024-T4 friction stir welding joints: influence of process parameters, Structural Integrity and Durability 1 (4) (2005) 245–252.
• [12] Y. Bozkurt, M.K. Bilici, Application of Taguchi approach to optimize of FSSW parameters on joint properties of dissimilar AA2024-T3 and AA5754-H22 aluminum alloys, Materials and Design 51 (2013) 513–521.

Uwagi

PL

Opracowanie rekordu w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2018)