Influence of ER 316 L Filler Metal to Microstructure and Mechanical Properties of Hastelloy C276/UNS 32205 Dissimilar Welds

Öz

In this study, the dissimilar combinations of Hastelloy C-276 nickel-based super alloy and UNS 32205 duplex stainless steel are welded using MAG (metal active gas) method and ER 316L filler metal. The chemical properties of the filler metal are different from the mechanical and chemical properties of both base materials. The general microstructure of the weldment was examined with an optical microscope. The elemental characterization of the transition region between the base metal, weld metal and the fusion line is performed by using elemental mapping and by explaining the elemental mapping in this region with dilution. High toughness results had been obtained because of the nickel content of the filler metal.

Anahtar Kelimeler

• Ni alloy
• Duplex stainless steel
• Welding metallurgy
• Mechanical properties
• Microstructural characterization

Hastelloy C276/UNS S32205 Malzeme Çiftinin Birleştirilmesinde ER 316 L İlave Metal Kullanımının Mikroyapı ve Mekanik Özelliklere Etkisi

Öz

Bu çalışmada, Hastelloy C276 nikel bazlı süper alaşım ile UNS S32205 dubleks paslanmaz çelik benzer olmayan malzeme çifti, MAG (metal aktif gaz) yöntemi ve ER 316L ilave metali kullanılarak birleştirilmiştir. Kullanılan ilave metalin kimyasal özellikleri her iki ana malzemenin mekanik ve kimyasal özelliklerinden farklıdır. Kaynaklı bağlantının genel mikro yapısı optik mikroskop ile incelenmiştir. Benzer olmayan birleştirmenin, ergime sınırlarında meydana gelen geçiş bölgesinin elementel karakterizasyonu yapılarak, bu bölgede seyrelme sonucu meydana gelen değişimler elementel haritalama ile açıklanmıştır. İlave metalin Nikel içeriği nedeni ile tüm çentik darbe testi numunelerinde yüksek tokluk değerleri elde edilmiştir.

Anahtar Kelimeler

• Ni alaşımları
• Dubleks paslanmaz çelik
• Kaynak metalürjisi
• Mekanik özellikler
• Mikroyapı karakterizasyonu

Kaynakça

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