Fatigue Life Assessment of 5083 “O” Aluminum Alloy Joints Welding by The MIG Process

  • Gabriela Pegoretti Faculty of Engineering and Architecture. Welding Technology Laboratory University of Passo Fundo, BR 285 São José, Passo Fundo, CEP: 99052-900 Rio Grande do Sul, Brazil.
  • William Haupt Postgraduate Program in Design and Manufacturing Processes PPGPPF / UPF. Welding Technology Laboratory University of Passo Fundo, BR 285 São José, Passo Fundo, CEP: 99052-900 Rio Grande do Sul, Brazil.
  • Alexandre Pereira Dall’Oglio Faculty of Engineering and Architecture. Welding Technology Laboratory University of Passo Fundo, BR 285 São José, Passo Fundo, CEP: 99052-900 Rio Grande do Sul, Brazil.
  • Kaue Correa Riffel Federal University of Santa Catarina, Department of Mechanical Engineering, Welding Laboratory, Florianópolis, Santa Catarina, Brazil.
  • Charles Leonardo Israel Postgraduate Program in Design and Manufacturing Processes PPGPPF / UPF. Metallography Laboratory University of Passo Fundo, BR 285 São José, Passo Fundo, CEP: 99052-900 Rio Grande do Sul, Brazil.
Keywords: Automatic MIG welding, Aluminium 5083, Fatigue life welds, Fractography

Abstract

In order to analyse the fatigue resistance of joints welded by the MIG process in aluminium alloy 5083 “O”, the present study analyses the influence of the shielding gases used during welding in the final strength of the product when it is subjected to fatigue stresses. The welds were made using two gas configurations, the first configuration being with 100% argon and the second with 75% argon and 25% helium. The results indicate that with the use of 25% helium compared to 100% argon it is possible to reduce the porosity present in the melted area of the joints and increase fatigue life for the conditions with cyclical loads of 80 and 60% of the maximum tension of the materials.

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Published
2021-04-24
Section
Articles