Inconel 625-AISI 304L Malzeme Çiftinin Yüksek Nikelli İlave Metal ile Birleştirilmesi: Mikroyapısal ve Mekanik Özellikler

Yıl 2018, Cilt: 33 Sayı: 2, 73 - 82, 30.06.2018

Mustafa Tümer

https://doi.org/10.21605/cukurovaummfd.508894

Öz

Inconel 625 nikel esaslı süper alaşım ile AISI 304 L ostenitik paslanmaz çelik farklı cins malzeme çifti, TIG (gas tungsten arc welding) yöntemi ile ErNiCr3 ilave metali kullanılarak birleştirilmiştir. Birbirinden değişik fiziksel ve kimyasal özelliklere sahip farklı cins malzeme çifti yüksek nikel içeriğine sahip ilave metalle birleştirilmiş ve bağlantının kaynak metali (KM) mikroyapı, sertlik ve tokluk özelikleri incelenmiştir. Kaynak metalinde ve ergime sınırında (ES) meydana gelen mikroyapısal dönüşümler ve intermetalik fazlar karakterize edilmiştir. Ana malzemelerin ve ilave metalin içerdiği elementlerin oranlarına bağlı olarak meydana gelen mikroyapısal dönüşümler, kaynak metali ve ITAB (Isı Etkisi Altındaki Bölge) açısından incelenmiştir. Seyrelme miktarına bağlı olarak kaynak metali ve ITAB kimyasal içerik farklılığı SEM/EDS (Taramalı elektron Mikroskobu/Enerji Dağılımlı Spektrometre) yardımı haritalama işlemi ile saptanmıştır. Elde edilen kaynak metali düşük sıcaklıklarda yüksek tokluk özelliklerine sahiptir. Kaynak metali kimyasal içeriği seyrelme nedeniyle elementel değişimlere maruz kalmıştır.

Anahtar Kelimeler

Inconel 625, AISI 304L paslanmaz çelik, Mikroyapı, Sertlik, Tokluk

Joining of Inconel 625 and AISI 304L Dissimilar Material Pairs using High-Nickel Content Filler Metal: Microstructural and Mechanical Properties

Öz

In this study, a couple of Inconel 625 nickel based super alloy and AISI 304 L austenitic stainless steel dissimilar materials were welded by TIG (gas tungsten arc welding) method using ErNiCr3 filler metal. A couple of dissimilar materials with different physical and chemical properties are joined with a high nickel content filler metal, and the weld metal microstructure, hardness and toughness properties of the weld are investigated. Microstructural transformations and intermetallic phases in the weld metal and at the melting boundary and precipitates formed in the structure have been characterized. Microstructural changes, which depend on the chemical composition of base metal are examined both in terms of weld metal and HAZ (Heat Affected Zone). Depending on the dilution amount, the difference in weld metal and HAZ chemical concentration was determined by SEM / EDS (Scanning Electron Microscopy/Energy Dispersive Spectroscopy) assistance mapping process. The obtained weld metal has high toughness properties at low temperatures. The chemical content of weld metal has exposed to partial elemental changes due to dilution. 

Anahtar Kelimeler

Inconel 625, AISI 304L stainless steel, Microstructure, Hardness, Toughness

Kaynakça

• 1. Shah Hosseini, H., Shamanian, M., Kermanpur, A., 2011. Characterization of Microstructures and Mechanical Properties of Inconel 617/310 Stainless Steel Dissimilar Welds, Mater. Charact, 62(4), 425–431.
• 2. Mortezaie, A., Shamanian, M., 2014. An Assessment of Microstructure, Mechanical Properties and Corrosion Resistance of Dissimilar Welds Between, Inconel 718 and 310S Austenitic Stainless Steel, Int. J. Press. Vessel. Pip., 116(1), 37–46.
• 3. Sridhar, R., Devendranath Ramkumar, K., Arivazhagan, N., 2014. Characterization of Microstructure, Strength, and Toughness of Dissimilar Weldments of Inconel 625 and Duplex Stainless Steel SAF 2205, Acta Metall. Sin. (English Lett., 27(6), 1018–1030.
• 4. Kumar, K.G., Ramkumar, K.D., Arivazhagan, N., 2015. Characterization of Metallurgical and Mechanical Properties on the Multi-pass Welding of Inconel 625 and AISI 316L, J. Mech. Sci. Technol., 29(3), 1039–1047.
• 5. Li, G., Huang, J., Wu, Y., 2014. An Investigation on Microstructure and Properties of Dissimilar Welded Inconel 625 and SUS 304 using High-power CO2 laser, Int. J. Adv. Manuf. Technol., 76(5-8), 1203-1214.
• 6. Korrapati, P.K., Avasarala, V.K., Bhushan, M., Devendranath Ramkumar, K., Arivazhagan N., Narayanan, S., 2014. Assessment of Mechanical Properties of PCGTA Weldments of Inconel 625, Procedia Eng., 75, 9–13.
• 7. Yılmaz, R., Tümer, M., 2013. Microstructural Studies and Impact Toughness of Dissimilar Weldments Between, AISI 316 L and AH36 steels by FCAW,” Int. J. Adv. Manuf. Technol., 67(5–8), 1433–1447.
• 8. Kangazian, J., Shamanian, M., 2017. Mechanical and Microstructural Evaluation of SAF 2507 and Incoloy 825 Dissimilar Welds, J. Manuf. Process., 26, 407–418.
• 9. Sireesha, M., Albert, S.K., Shankar, V., Sundaresan, S., 2000. A Comparative Evaluation of Welding Consumables for Dissimilar Welds Between 310 Austenitic Stainless Steel and Inconel 657.pdf, 279, 65-76.
• 10. Devendranath Ramkumar, K., Sridhar, R., Periwal, S., Oza, S., Saxena, V., Hidad, P., Arivazhagan, N., 2015. Investigations on the Structure-Property Relationships of Electron Beam Welded Inconel 625 and UNS 32205, Mater. Des., 68, 158-166.
• 11. Naffakh, H., Shamanian, M., Ashrafizadeh, F., 2010. Microstructural Evolutions in Dissimilar Welds Between AISI 310 Austenitic Stainless Steel and Inconel 657, J. Mater. Sci., 45(10), 2564–2573.
• 12. Madhusudhana Reddy, G., Srinivasa Murthy, C.V., Srinivasa Rao, K., Prasad Rao, K., 2009. Improvement of Mechanical Properties of Inconel 718 Electron Beam Welds-influence of Welding Techniques and Postweld Heat Treatment, Int. J. Adv. Manuf. Technol., 43(7-8), 671-680.
• 13. Bae, S.H., Il Kwon, S., Yoon, J.G., Lee, J.H., Do, J.H., Kim, I.S., Choi, B.G., Jo, J.Y., Hong, H.U., 2014. Effect of Post Weld Heat Treatment on Cryogenic Mechanical Properties of Electron Beam Welded Cast Inconel 718, Metall. Mater. Trans. A Phys. Metall. Mater. Sci., 45(2), 537–542.
• 14. Ramkumar, K.D., Kumar, B.M., Krishnan, M.G., Dev, S., Bhalodi, A.J., Arivazhagan, N., Narayanan, S., 2015. Studies on the Weldability, Microstructure and Mechanical Properties of Activated Flux TIG Weldments of Inconel 718, Mater. Sci. Eng. A, 639, 234–244.
• 15. Naffakh, H., Shamanian, M., Ashrafizadeh, F., 2008. Influence of Artificial Aging on Microstructure and Mechanical Properties of Dissimilar Welds Between 310 Stainless Steel and INCONEL 657, Metall. Mater. Trans. A Phys. Metall. Mater. Sci., 39(10), 2403–2415.
• 16. Lippold, J.C., John, D.N., Kiser, S.D., 2009. Welding Metallurgy and Weldability of Nickel-Base Alloys. John Wiley & Sons, Inc. All.
• 17. Naffakh, H., Shamanian, M., Ashrafizadeh, F., 2009. Dissimilar Welding of AISI 310 Austenitic Stainless Steel to Nickel-based Alloy Inconel 657, J. Mater. Process. Technol., 209(7), 3628-3639.
• 18. Xing, X., Di, X., Wang, B., 2014. The Effect of Post-weld Heat Treatment Temperature on the Microstructure of Inconel 625 Deposited Metal, J. Alloys Compd., 593, 110–116.
• 19. Kadoi, K., Shinozaki, K., 2017. Effect of Chemical Composition on Susceptibility to Weld Solidification Cracking in Austenitic Weld Metal, Metall. Mater. Trans. A Phys. Metall. Mater. Sci., 48(12), 5860–5869.
• 20. Wang, H., He, G., 2016. Effects of Nb/Cr on the Cryogenic Impact Toughness of the Deposited Metal of ENiCrFe-9,” Mater. Sci. Eng. A, 672, 15–22.