Stress corrosion cracking of welded joints of Al-Mg alloys

• Autorzy: Czechowski M.

Identyfikatory

DOI

10.5604/12314005.1133154

• Języki publikacji: EN

Abstrakty

EN

Slow strain rate testing (SSRT) was used to test the stress corrosion cracking (SCC) of aluminium alloys AW 5083 and AW 5059 (Alustar) jointed by friction stir welding (FSW). The test was carried out in the air and 3.5% water solution NaCl. Cylindrical notch-free specimens and cylindrical notched specimens (R = 5 mm) were used. The following parameters were measured: time-to-failure – T [h], obtained max. load – F [N]; strain energy (the diagram surface under the stress-elongation curve) – E [MAJ/m3]; relative elongation of the specimen – A11.3 [%]; max. tensile stress – R [MPa] and narrowing – Z [%]. On the basis of obtained results, it was noted that FSW-welded joints show superior strength and resistance to stress corrosion, compared to MIG-welded joints. The fractions after SSRT testing were cleaved with some ductile areas. This article also gives the mechanical features of friction stir welded Al-Mg alloys. Tests have shown that the 5059 alloy, welded by FSW, has superior strength properties compared to the FSW 5083 alloy, along with comparable, good resistance to stress corrosion. FSW 5083 alloy joints have very good resistance to stress corrosion - better than those made using traditional welding methods (MUG). Original value are received results of the stress corrosion resistance of new method friction stir welded Al-Mg alloy compared with traditional MIG method.

Słowa kluczowe

EN

stress corrosion cracking; welding; aluminium alloy; friction stir welding (FSW)

• Wydawca: Łukasiewicz Research Network - Institute of Aviation ; European Science Society of Powertrain and Transport KONES Poland ; Wydawnictwo Instytutu Technicznego Wojsk Lotniczych
• Czasopismo: Journal of KONES
• Rocznik: 2014
• Tom: Vol. 21, No. 3
• Strony: 41--45
• Opis fizyczny: Bibliogr. 8 poz., rys.

Twórcy

autor

Czechowski M.

• Gdynia Maritime University, Faculty of Marine Engineering Morska Street 81-87, 81-225 Gdynia, Poland tel.:[phone], fax: [phone]

Bibliografia

• [1] Thomas, W. M., Friction stir welding. GB patent 9125978, 6.12.1991, International patent application PCT/GB92/02203.
• [2] Eriksson, L. G., Larsson, R., Friction Stir Welding - progress in R&D and new applications, Svetsaren, Vol. 57, No. 2, 11-13, 2002.
• [3] Eriksson, L. G., Friction stir welding, Svetsaren, Vol. 56, No. 2-3, 3-6, 2001.
• [4] Czechowski, M., Podatność na niszczenie środowiskowe złączy stopów Al-Mg spajanych wybranymi metodami, Prace Naukowe Akademii Morskiej w Gdyni, Gdynia 2009.
• [5] Dudzik, K., Czechowski, M., Analysis of possible shipbuilding application of Friction Stir Welding (FSW) method to joining elements made of AlZn5Mg1 alloy, Polish Maritime Research No. 4, 2009.
• [6] Dudzik, K., The influence of joining method of AW-7020 aluminium alloy on corrosion properties, Journal ofKONES Powertrain and Transport, Vol. 18, No. 4, Krakow 2011.
• [7] Squillace, A., Fenzo, A., Giorleo, G., Bellucci, F., A comparison between FSW and TIG welding techniques: modifications of microstructure and pitting corrosion resistance in AA 2024-T3 butt joints, Materials Processing Technology, 152, 97-105, 2004.
• [8] Davis, J. R., Corrosion of Aluminium and Aluminium Alloys, ASM International, Materials Park, OH, 1999.