Alüminyumun TIG kaynağında akım türünün kaynak metali mikroyapısı ve darbe dayanımına etkisi

Bu çalışmada, AA 6063 T6 sınıfı alüminyum levhalar TIG kaynak yöntemi ile alternatif ve darbeli akım kullanılarak birleştirilmişlerdir. Kullanılan akım türünün kaynak metaline olan etkilerini görmek amacı ile birleştirilen numunelere mikroyapı, sertlik ve çentik darbe testleri uygulanmıştır. Deneyler sonucunda, darbeli akımın düşük ısı girdisine, kaynak metalinde tane incelmesine ve alternatif akıma göre kaynak metali sertliğinde artışa neden olduğu belirlenmiştir. Kaynak metalinden ölçülen çentik darbe test sonuçlarına göre darbeli akım ile gerçekleştirilen birleştirmelerin alternatif akım ile yapılan birleştirmelerden daha yüksek darbe dayanımı gösterdiği tespit edilmiştir.

The effect of current type on welded metal microstructure and impact strength in TIG welding of aluminum

In this study, AA 6063 T6 grade aluminum sheets were joined by TIG welding method using alternating and pulsed current. Impact and hardness tests on the joined parts were carried out for measuring the effects of current type on microstructure. Experimental studies showed that, pulsed current lead less heat input, grain refinement of weld metal and hardness increase than alternating current. Impact tests showed that the samples were welded by using pulsed current have more impact energy than that of welded by using alternative current.

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