Low - cycle fatigue of Al-Mg alloy joints

• Autorzy: Czechowski M.
• Języki publikacji: EN

Abstrakty

EN

This article presents the results of the low-cycle fatigue tests of AW-5059 Alustar alloy. Gas metallic welding in argon arc shield was used. Metallographic analysis of bonds showed a proper structural construction MIG welded 5059 aluminum alloy. The low-cycle fatigue tests were carried out in the air and artificial seawater (3.5% water solution NaCl), with stable amplitude of stress value. The stresses were changed in the symmetric cycle (the stress ratio was R = -1) with constant strain rate of 5mm/min and the frequencies oscillating between 0.08-0.2 Hz. During the tests the following parameters was observed: number of cycles until the specimen's destruction, upper and lower extreme values of force and strain for the selected cycles, duration-time of the test and frequency. Analysis of specimens fracture surfaces was performed with scanning electron microscope (SEM) Philips XL30. In case of the specimens exposed in 3,5% water solution NaCl the fatigue durability is lower than the durability of specimens tested in the air. The article depicts the changes in total strain amplitude Iac [mm] depending on number of cycles [N] obtained in the tests with ia=const and the low-cycle fatigue resistance for the welded Alustar alloy. Original value are received results of the low-cycle fatigue tests of AW-5059 Alustar alloy welded by MIG

Słowa kluczowe

EN

corrosion fatigue; Al-Mg alloy; MIG welding

• 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: 2012
• Tom: Vol. 19, No. 2
• Strony: 103--108
• Opis fizyczny: Bibliogr. 11 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

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• [2] Czechowski, M., Mechanical properties of butt joints of Al-Mg alloy sheets bonded by different methods, Materiały I Technologie, Wydz.Mech., Politechnika Gdańska, Nr 1(1), pp. 16-19, 2003.
• [3] Chrzanowski, J., Czechowski, M., Zieliński, A., Susceptibility to stress corrosion cracking in 3.5% NaCl of the welded joints of some aluminium alloys, Inżynieria Materiałowa Nr 4(123), Rok XXII, pp. 255-258, 2001.
• [4] Czechowski, M., Domżalicki, P., Corrosion resistance in fast flow at sea water of Al-Mg welded joints, Ochrona przed korozją, Nr 12, pp. 326-328, 2003.
• [5] Kocańda, S., Kocańda, A., Niskocyklowa wytrzymałość zmęczeniowa metali, PWN, Warszawa 1989.
• [6] PN-84/H-04334, Low-cycle fatigue testing for metals.
• [7] Czechowski, M., Badania fraktograficzne spajanych stopów Al-Mg, Przegląd Spawalnictwa 5-6, 2006.
• [8] Czechowski, M., Low-cycle fatigue of friction stir welded Al-Mg alloys, Journal of Materials Processing Technology, pp. 164-165, 2005.
• [9] Wyrzykowski, J. W., Pleszakow, E., Sieniawski, J., Odkształcenie i pękanie metali, Wydawnictwa Naukowo Techniczne, Warszawa 1999.
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