Mechanical properties of 5083, 5059 and 7020 aluminium alloys and their joints welded by FSW

• Autorzy: Dudzik K. , Charchalis A.
• Języki publikacji: EN

Abstrakty

EN

The article presents the research results on the mechanical properties of aluminum alloy 7020 and its friction stir welded (FSW) joints. For comparison alloy 5083 – the most currently used in shipbuilding alloy was chosen as well as 5059 - the new high-strength alloy. Besides the native material alloys there were investigated their joints welded by FSW - the same method as alloy 7020. Welding parameters used for the connection of the sheets made of 7020, 5083 and 5059 alloys were presented. Metallographic analysis showed the correct construction of structural bonded joints. Friction Stir Welding (FSW) – a new technology can be successfully used for butt welding of different types of aluminum alloy sheets. FSW method can be an alternative to traditional arc welding methods i.e. MIG or TIG. The research was carried out using a static tensile test in accordance with the requirements of the Polish Standards PNEN ISO 4136:2011 and PN-EN ISO 6892-1:2010. Flat samples cut perpendicular to the direction of rolling were used. The research was conducted at the temperature of + 20ºC. The 7020 alloy has higher strength properties then alloys: 5083 and 5059. The yield stress is higher by 14.8% compared to 5083 alloy, and by 11.7% compared to the alloy 5059. Plastic properties of an alloy 7020 are the lowest, but with reserves meet the requirements of classification societies. The joints welded by FSW of 7020 alloy have higher strength properties then joints of alloys: 5083 and 5059. The yield stress achieves the highest value for alloy 7020 and is 24.2% higher than for 5083 alloy and 11.5% for the 5059 alloy. Despite the strength properties also plastic properties are best for 7020 alloy joints.

Słowa kluczowe

EN

friction stir welding (FSW); aluminium alloys; joints; welding; mechanical properties; shipbuilding

• 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: 2013
• Tom: Vol. 20, No. 2
• Strony: 69--73
• Opis fizyczny: Bibliogr. 8 poz., rys.

Twórcy

autor

Dudzik K.

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

autor

Charchalis A.

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

Bibliografia

• [1] Czechowski, M., Effect of anodic polarization on stress corrosion cracking of some aluminium alloys, Advances in Materials Science, Vol. 7, pp. 13-20, No. 1(11), 2007.
• [2] Czechowski, M., Low-cycle fatigue of friction stir welded Al-Mg alloys. Journal of Materials Processing Technology, 164-165, 1001-1006, 2005.
• [3] Czechowski, M., Własności złączy doczołowych blach ze stopów Al-Mg spajanych różnymi metodami, Materiały i Technologie, Politechnika Gdańska, Nr 1(1), Gdańsk 2003.
• [4] 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.
• [5] Ferraris, S, Volpone, L. M., Aluminium alloys in third millennium shipbuilding: materials, technologies, perspectives, The Fifth International Forum on Aluminium Ships, Tokyo, Japan 2005.
• [6] Pietras, A., Zadroga, L., Łomozik, M., Charakterystyka zgrzeiny utworzonej metodą zgrzewania z mieszaniem materiału zgrzeiny (FSW), Biuletyn Instytutu Spawalnictwa w Gliwicach, Nr 3, 2003.
• [7] Polish Standard PN-EN ISO 4136:2011.
• [8] Polish Standard PN-EN ISO 6892-1:2010.