Influence of the notch for mechanical properties of 7020 aluminium alloy jointed by FSW

• Autorzy: Dudzik K. , Czechowski M.
• Języki publikacji: EN

Abstrakty

EN

The article presents the results of the mechanical properties of aluminum alloy AW 7020 [AlZn5Mgl] welded by friction s tir welding FSW. Friction Stir Welding (FSW) - a new technology can be successfully used for butt welding of different types of aluminum alloy sheets. In the article the parameters for friction stir welding of sheets made of AlZn5Mgl [7020] alloy were presented. Analysis of bonds showed a proper structural construction of the FSW welded 7020 aluminum alloy. The test was examined via the slow-strain-rate-testing (SSRT) according to ENISO 7539-7. The following parameters were measured: time-to-failure - T [min], obtained max. load - F [N]; strain energy (the diagram surface under the stress-elongation curve) - E [MJ/m3]; relative elongation of the specimen - A10 [%]; max. tensile stress - R [MPa] and contraction - Z [%]. The tests were carried out on cylindrical notch-free specimens and on specimens with "U"- notch in the air. Despite the use of "U" - notch cut in the joint, the specimens cracked in the native material. On the basis of test results were high strength properties of aluminum alloy 7020joints welded by FSW. Original values are received results of the mechanical properties of new method friction stir welded AW- 7020 [AlZn5Mgl] alloy.

Słowa kluczowe

EN

aluminium alloys; friction stir welding (FSW); mechanical properties; slow-strain-rate-testing

• 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: 2010
• Tom: Vol. 17, No. 4
• Strony: 131--135
• Opis fizyczny: Bibliogr. 10 poz., rys.

Twórcy

autor

Dudzik K.

autor

Czechowski M.

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

Bibliografia

• [1] Anderson, T., New developments within the Aluminium Shipbuilding Industry, Svetsaren, pp. 3-5, Vol. 58, No. 1, 2003.
• [2] Bugłacki, H., Wpływ technologii spawania na odporność korozyjna stopów Al-Zn-Mg, International Conference on Environmental Degradation of Engineering Materials, Politechnika Gdańska, pp. 260-267, Jurata 1999.
• [3] Cudny, K., Puchaczewski, N., Stopy metali na kadłuby okrętowe, Politechnika Gdanska, Gdańsk 1995.
• [4] Czechowski, M., Effect of anodic polarization on stress corrosion cracking of some aluminium alloys, Advances in Materials Science, Vol. 7, No. 1 (11), pp. 13-20, 2007.
• [5] Czechowski, M., Własności złączy doczołowych blach ze stopów Al-Mg spajanych różnymi metodami, Materiały i Technologie, Politechnika Gdanska, Nr 1 (1), pp. 16-19, Gdansk 2003.
• [6] Czechowski, M., Chrzanowski, J., Zielinski, A., Naprężeniowe pekanie korozyjne złączy spawanych stopów aluminium, Materiały II Pomorskiej Konferencji Naukowej – Inzynieria Materiałowa 2001, Politechnika Gdańska, Sobieszewo 2001.
• [7] Czechowski, M., Pietras, A., Zadroga, L., Własności stopów aluminium serii 5000 zgrzewanych tarciowo nową technologią FSW, Inzynieria Materiałowa, Nr 6, pp. 264-266, 2003,
• [8] Czechowski, M., Zielinski, A., Effect of cathodic polarization on failure and degradation of mechanical properties of some aluminium alloys, Scripta Metallurgy Materials, Vol. 30, 1994.
• [9] Lahti, K., FSW – possibilities in shipbuilding, Svetsaren, Vol. 58, No. 1 pp. 6-8, 2003.
• [10] PN-EN ISO 7539-7: 2000. Badania korozji naprężeniowej. Próba odkształcenia z małą prędkoscią.