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