Microstructure and properties of FSW joints of 2017A/6013 aluminium alloys sheets

• Autorzy: Mroczka K. , Dutkiewicz J. , Lityńska-Dobrzyńska L. , Pietras A.
• Języki publikacji: EN

Abstrakty

EN

Purpose: The aim of the studies was to analyse the structure and mechanical properties of FSW joints. Experiment were perform in order to study possibilities to join different aluminium alloys 2017A and 6013. The alloys differ one from the other with respect to chemical composition and mechanical properties especially, therefore the ability to perform the correct joints may be useful for special constructions. Design/methodology/approach: The joints were produced applying different parameters and temperatures. The microstructure was studied using optical, scanning electron and transmission electron microscopes. The mechanical properties are discussed with regard to microhardness profiles on the cross-sections of the joints. Findings: No cracks were found in the joints. Weld nuggets were formed in the 2017A alloy which was located on the advancing side during welding. Mixing process of the materials within the joints was observed as a formation of separate regions of the materials being joined. The hardness profiles showed sudden changes of hardness what correlates with structure observations. In the vicinity of the weld nugget higher dislocation density was observed. Lowering the temperature of sheets and welding with intensive cooling caused a decrease in size of the weld nugget. Research limitations/implications: In the further studies, tensile and bending tests are planned. Moreover, an attempt of explaining the influence of precipitates at the regions boundaries on the fracture process. Practical implications: Good quality of the joints can be stated on the basis of structure analysis. The chosen parameters of welding can be considered as proper ones. Originality/value: Comparison of the welding of the alloys2017A and 6013 are not common. The results of studies and conclusions presented in the paper are consecutive data complementing knowledge on FSW of the aluminium alloys. The applied welding parameters ensure good quality of joints with respect to the technology.

Słowa kluczowe

EN

friction stir welding; aluminium alloy 2017A; aluminium alloy 6013; dissimilar material welding

PL

technologia zgrzewania FSW; stop aluminium; spawanie materiałów różnoimiennych

• Wydawca: International OCSCO World Press
• Czasopismo: Archives of Materials Science and Engineering
• Rocznik: 2008
• Tom: Vol. 33, nr 2
• Strony: 93--96
• Opis fizyczny: Bibliogr. 20 poz.

Twórcy

autor

Mroczka K.

autor

Dutkiewicz J.

autor

Lityńska-Dobrzyńska L.

autor

Pietras A.

• Institute of Technology, Pedagogical University of Cracow, ul. Podchorążych 2, 30-084 Kraków, Poland,

Bibliografia

• [1] M.St. Węglowski, Y. Huang, Y.M. Zhang, Effect of welding current on metal transfer in GMAW, Archives of Materials Science and Engineering 33/1 (2008) 49-53.
• [2] M. Vural, A. Ogur, G. Cam., C. Ozarpa, On the friction stir welding of aluminium alloys EN AW2024-0and EN AW5754-H22, Archives of Materials Science and Engineering 28/1 (2007) 49-54.
• [3] J.H. Ouyang, R. Kovacevic, Material flow and microstructure in the friction stir butt welds of the same and dissimilar aluminum alloys, Journal of Materials Engineering and Performance 11/1 (2002) 57-63.
• [4] H. Uzun, C. D. Donne, A. Argagnotto, T. Ghidini, C. Gambaro, Friction stir welding of dissimilar Al 6013-T4 to X5CrNi18-10 stainless steel, Materials and Design 26 (2005) 41-46.
• [5] C.M. Chen, R. Kovacevic, Joiningof Al 601 alloy to 1018 steel by combined effects of fusion and solid state welding, International Journal of Machine Tool & Manufacture 44 (2004) 1205-1214.
• [6] M. Peel, A. Steuwer, M. Preuss, P.J. Withers, Microstructure, mechanical properties and residual stressesas a function of welding speed in aluminum AA5083 friction stir welds, Acta Materialia 51 (2003) 4791-4801.
• [7] H. Fujii, L. Cui, M. Maeda, K. Nogi, Effect of tool shape on mechanical properties and microstructure of friction stir welded aluminum alloys, Materials Science and Engineering A 419 (2006) 25-31.
• [8] A. Scialpi, L.A.C De Filippis, P. Cavaliere, Influance of shoulder geometry on microstructure and mechanical properties of friction stir welded 6082 alluminium alloy, Materials and Design 28 (2007) 1124-1129.
• [9] P. Cavaliere, R Nobile, F.W. Panella, A. Squillance, Mechanical and microstructural behavior of 2024 - 7075 aluminum alloy sheets joined by friction stir welding, International Journal of Machine Tools and Manufacture 46 (2006) 588-594.
• [10] J.-Q. Su, T.W. Nelson, R. Mishra, M. Mahoney, Micro-structural investgation of friction stir welded 7050 - T651 aluminium, Acta Materialia 51 (2003) 713-729.
• [11] Kh.A.A. Hassan, A.F. Norman, D.A. Price, P.B. Prangnell, Stability of nugget zone grain structure in high strength Al- alloy friction stir welds during solution treatments, Acta Materialia 51 (2003) 1923-1936.
• [12] G. Pouget, A.P. Reynolds, Residual stress and microstructure effects on fatigue crack growth in AA 2050 friction stir welds, International Journal of Fatigue 30 (2008) 463- 472.
• [13] P. Cavaliere, A. Squillace, High temperature deformation of friction stir processed 7075 aluminium alloy, Materials Characterization 55 (2005) 136-142.
• [14] J. Dutkiewicz, K. Mroczka, A. Pietras, Microstructure of friction stir welded 7075 aluminum alloy sheets, Proceedings of the International Conference ALUMINIUM 2005.
• [15] H.J. Liu, J.C. Feng, H. Fuji, K. Nogi, Wear characteristics of a WC-Co tool in friction stir welding of AC4A +30 vol % SiCp composite, International Journal of Machine Tools and Manufacture 45 (2005) 1635-1639.
• [16] V. Soundararajan, E. Yarrapareddy, R. Kovacevic, Investigation of the friction stir lap welding of aluminum alloys AA 5128 and AA6022 Journal of Materials Engineering and Performance 16/4 (2007) 491-496.
• [17] L.A. Dobrzański, Ł. Reiman, G. Krawczyk, Influence of the ageing on mechanical properties of the aluminium alloy AlSi9Mg, Archives of Materials Science and Engineering 31/1 (2008) 37-40.
• [18] J. Adamowski, C. Gambaro, E. Lertora, M. Ponte, M. Szkodo, Analizys of FSW welds made of aluminium alloy AW6082-T6, Archives of Materials Science and Engineering 28/7 (2007) 453-460.
• [19] G. Mrowka-Nowotnik, J. Sieniawski, M. Wierzbińska, Intermetallic phase particles in 6082 aluminium alloy, Archives of Materials Science and Engineering 28/2 (2007) 69-76.
• [20] A. Barcellona, G. Buffa, L. Fratini, D. Palmeri, On microstructural phenomena occurring in friction stir welding of aluminum alloys, Journal of Materials Processing Technology 177 (2006) 340-343.