610e0185-d2b9-4a29-9584-d24b4d50a87720210319062712818wseamdt@crossref.orgMDT DepositWSEAS TRANSACTIONS ON SYSTEMS AND CONTROL1991-876310.37394/23203http://wseas.org/wseas/cms.action?id=4073220202022020201510.37394/23203.2020.15http://wseas.org/wseas/cms.action?id=23195Stress Corrosion Cracking of Friction Stir Welding (FSW) of AW 5083 and AW 5059 Aluminium AlloysMirosławCzechowskiFaculty of Marine Engineering, Gdynia Maritime University, Gdynia, POLANDFriction stir welding (FSW) joints of AW 5083 and AW 5059 alloys were used for the study. Mechanical properties, resistance to stress corrosion cracking (SCC) were investigated and metallographic tests were performed using an optical and scanning microscope (SEM). The parameters of friction welding are also given. Stress corrosion was investigated by the method of slow strain rate testing (SSRT) in air and 4.5% NaCl aqueous solution. During SCC tests elongation, strength, fracture energy and time to break were measured. Very good strength of the tested alloys was found with good resistance to stress corrosion cracking. The aim of the study was to determine the possibility of using the AW 5059 and AW 5083 friction welded (FSW) alloys in marine structures, using stress corrosion resistance as a criterion1027202010272020585591https://www.wseas.org/multimedia/journals/control/2020/b165103-030.pdf10.37394/23203.2020.15.58https://www.wseas.org/multimedia/journals/control/2020/b165103-030.pdfThomas W.M., Friction stir welding. GB patent 9125978, 6.12.1991, International patent application PCT/GB92/02203. Czechowski M., Pietras A., Zadroda L., The properties of aluminium alloys 5xxx series welded by new technology Friction Stir Welding, Inżynieria Materiałowa, Vol. 137, No. 6, 2003, pp. 264-266.Eriksson L.G., Larsson R., Friction Stir Welding – progress in R&D and new applications, Svetsaren, Vol. 57 No. 2, 2002, pp. 11-13. Eriksson L.G., Friction stir welding, Svetsaren,Vol. 56, No. 2-3, 2001, pp. 3-6. Davis J. R.: Corrosion of Aluminium and Aluminium Alloys,ASM International, Materials Park, OH, 1999. 10.5006/1.3277553Lumsden J.B., Mahoney M.W., Rhodes C.G. Pollock G.A., Corrosion Behavior of Friction-Stir-Welded AA 7050-T7651, Corrosion, Vol. 59, No. 3, 2003, pp. 212-219. 10.1016/j.jmatprotec.2004.03.022Squillace A., Fenzo A., Giorleo G., Bellucci F., A comparison between FSW and TIG welding techniques: modifications of microstructure and corrosion resistance in AA 2024-T3 butt joints. Materials Processing Technology, Vol. 152, 2004, pp. 97-105. 10.1016/j.jallcom.2014.08.099Meng, C., Zhang, D., Cui, H., Zhuang, L., & Zhang, J. Mechanical properties, intergranular corrosion behavior and microstructure of Zn modified Al-Mg alloys. Journal of Alloys and Compounds, 2014, Vol. 617, p 925-932. 10.1080/13621718.2018.1471844Zeng X. H., Wang D., Ni D. R., Wang K. S. & Ma Z.Y., Material flow and void defect formation in friction stir welding of aluminium alloys, Science and Technology of Welding and Joining, Vol. 23, 2018, pp. 677-686.