The Multi-Dimensional Optimization of Microstructure and Mechanical Properties of AA6061-T6 Aluminum Alloy joined by Cold Metal Transfer (CMT) Welding


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Şen M., Ferik E.

7. Bilsel International Ahlat Scientific Researches Congress, Bitlis, Türkiye, 4 - 05 Ekim 2025, ss.355-366, (Tam Metin Bildiri)

  • Yayın Türü: Bildiri / Tam Metin Bildiri
  • Basıldığı Şehir: Bitlis
  • Basıldığı Ülke: Türkiye
  • Sayfa Sayıları: ss.355-366
  • Açık Arşiv Koleksiyonu: AVESİS Açık Erişim Koleksiyonu
  • Marmara Üniversitesi Adresli: Evet

Özet

Nowadays the automotive, aviation, and space industries increasingly seek low-cost, high-strength, lighter, and more efficient welding processes. CMT welding, which gives these qualities, shines out when joining aluminum alloys. In the investigation, cold metal transfer (CMT) was used to join AA6061-T6 sheets with AlMg4.5Mn filler wire. The mechanical characteristics and microstructures of welded joins generated at various torch angles, shielding gas flow rates, and welding speeds were examined. The Taguchi experimental design approach was used to determine the most optimal process parameters. The optimum levels for tensile strength were determined as A2-B2-C1 (70° - 12 L/min - 40 cm/min) and for hardness as A2-B1-C1 (70° - 8 L/min - 40 cm/min). In addition, the contribution of the process parameters to the findings was evaluated using ANOVA. The experimental study revealed that the most effective parameters on mechanical properties were welding speed, torch angle, and shielding gas flow rate. The mechanical characteristics decreased as the welding speed increased. High gas flow rate and torch angle were shown to have a negative impact on mechanical characteristics.