Soğuk Metal Transferi ile Birleştirilen AA5754 Alaşımı İnce Sacların Korozyon Davranışı

Öz

AA5754 alüminyum alaşımı, otomobillerin iç ve dış panellerinde yaygın olarak kullanılmaktadır. Bu çalışmada, soğuk metal transferi (CMT) ile birleştirilen 2 mm kalınlığındaki AA5754 levhaların, kaynak işlemi sonrası korozyon hızının araştırılması amaçlanmıştır. Kaynak işlemi ER5356 dolgu teli kullanılarak 73.97, 86.18, 108.99 J/mm ısı girdisi değerlerinde gerçekleştirilmiştir. Isı girdisinin korozyon hızına etkisi Tafel ekstrapolasyon yöntemi ile belirlenmiştir. Isı girdisinin artmasıyla korozyon hızının arttığı tespit edilmiştir. Korozyona uğramış yüzeyler taramalı elektron mikroskobu (SEM) ile incelenmiştir.  

Anahtar Kelimeler

• AA5754,CMT kaynağı,korozyon

Corrosion Behavior of AA5754 Thin Sheets Welded with Cold Metal Transfer Method

Öz

AA5754 aluminium alloy are widely used in outer and inner panels of automobiles. Present study aimed to investigate the corrosion rate of cold metal transfer (CMT) welded 2 mm thick AA5754 sheets. Welded sheets were produced with 73.97, 86.18, 108.99 J/mm heat input values using ER5356 filler wire. Effect of heat input on corrosion rate was determined by Tafel extrapolation method. It was determined that corrosion rate increased with increasing heat input. Corroded surfaces were viewed by SEM. Hardness test was applied and maximum hardness values were observed in weld metal.

Anahtar Kelimeler

• AA5754,CMT welding,corrosion

Kaynakça

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