The Weldability Evaluation of Dissimilar Welds of AISI 347 Stainless Steel to ASTM A335 Low Alloy Steel by Gastungesten Arc Welding

الموضوعات :

Iman Hajiannia ¹ (Department of Materials Engineering, Najafabad Branch, Islamic Azad University, Isfahan, Iran.)
Morteza Shamanian ² (Department of Materials Engineering, Isfahan University of Technology, Isfahan, Iran)
Masoud Kasiri ³ (Department of Materials Engineering, Najafabad Branch, Islamic Azad University, Isfahan, Iran.)

تاريخ الإرسال : 20 الثلاثاء , شوال, 1434 تاريخ التأكيد : 28 الأحد , محرم, 1435 تاريخ الإصدار : 25 الثلاثاء , ذو القعدة, 1434

الکلمات المفتاحية: Dissimilar welding, Microstructure, Austenitic stainless steel, Low alloy steels, Weldability,

ملخص المقالة :

In the present study, the Weldability and microstructure of dissimilar welds of AISI 347austenitic stainless steel to ASTM A335 low alloy steel was investigated. For this purpose, gas tungsten arc welding process and two filler metals including ERNICr-3 and ER309L were used. After welding, the microstructure of the different zones of each joint, including weld metals, heat affected zone (HAZ) 1, inter face and unmixed zones (UMZ) 2 were evaluated by using optical microscopy. The scanning electron microscopy (SEM) 3 equipped to energy disperse spectrometry (EDS) 4 was used to investigate the precipitates, in order to predict the micro structure of the weld metal and transmission zone in dissimilar joints. In ERNiCr-3 weld metal, the solidification was observed as the completely austenitic and equiaxed dendrite5 which contains the precipitates of carbide complex, and also Niobium segregation was happened in the inter dendrite zones. 309L weld metal was observed as the primary ferrite with austenitic matrix and also microstructure was seen as skeletal ferrite morphology. The epitaxial growth was observed in interface between 347austenitic stainless steel and two filler metals and a narrow zone was observed in interface between A335low alloy steel and filler metals, and also the coarse grains occurred in HAZ zone of both weld metals. Finally, it can be denoted that for the joints between the AISI 347 austenitic stainless steel and A335low alloy steel, by the ERNICr-3 filler material provides the optimum qualities.

المصادر:

1. H. ShahHosseini, M. Shamanian, A. Kermanpur, “Characterization of microstructures and mechanical properties of Inconel 617/310 stainless steel dissimilar welds”, Mater Charact, vol. 62, 2011, pp.425-431.


2. ASM Handbook, Volume 1, “Properties and Selection: Irons, Steels, and High Performance Alloys”, ASM International, Materials Park, Ohio, 2002.


3. J. C. Lippold, D. Koteki, “Welding Metallurgy and Weldability of Stainles Steels”, John Wiley and Sons, New Jersey, 2005.


4. N. Arivazhagan, S. SurendraSingh, “Investigation on AISI 304 Austenitic Stainless Steel to AISI 4140 Low Alloy Steel Dissimilar Joints by Gas Tungsten Arc, Electron Beam and Friction Welding”, Mater Des, vol. 32, 2011, pp. 3036–3050.


5. R. L. Klueh, L. King, “Austenitict Stainless Steel-Ferritic Steel Weld Joint Failures”, Weld J, Vol. 61, 1982, pp. 302-311.


6. H. Muesch, “Welding of material grade TP 347”, Nucl Eng Des, vol. 2, 2003, pp. 85:155-161.


7. G. Kaishu, X. Xiaodong, X. Hong, W. Zhiwen, “Effect of aging at 700 °c on precipitation and toughness of AISI 321 and AISI 347 austenitic stainless steel welds”, Nucl Eng Des, vol. 23, 2005, pp. 2485–2494.


8. M. Tan, E. Akiyama, H. Habazaki, A. Kawashima, “The role of chromium and molybdenum in passivation of amorphous Fe-Cr-Mo-P-C alloys in deaerated 1 M HCl”, Corros Sci, vol. 38, 1996, pp.
   2137-2151.


9. V. Kumslyts, A. Vaclovas, “The Influence of Temperature-Time Parameter of Welded Joints Thermal Treatment on Strength-Related Characteristics Chromium-Molybdenum and Low Alloy Manganese Steels”, Mat Science, vol. 13, 2007, pp. 123-126.


10. R. Dehmolaie, M. Shamanian, A. Kermanpour, “Microstructural characterization of dissimilar welds alloy 800 and HP heat – resistant steel”, Mater Charact, vol. 59, 2008, pp. 1447-54.


11. H. Naffakh, M. Shamanian, F. Ashrafizadeh, “Dissimilar Welding of AISI 310 Austenitic Stainless Steel to Nickel-Based Alloy Inconel 657”, J Mater Process Technol, vol. 209, 2008, 3628-3639.


12. M. Shimada, “intergranular corrosion resistant 304 stainless steel by twin-induced grain boundary engineering”, Acta Mater, vol. 50, 2003, pp.2331-2341.


13. ASME Sec II, “Specification for Welding Rods, Electrodes and Filler Metals, Part C”, American Society of Mechanical Engineers, 3^rd ed., 2004.


14. L. LI, R. MESSLER, “Segregation of Phosphorus and Sulfur in Heat-Affected Zone Hot Cracking of Type 308 Stainless Steel”, Weld J, 2002, pp. 78-84.


15. I. Haroe, A. Rosen, I. Hall, “Evolution of microstructure of AISI 347 stainless steel during heat treatment”, MSTec, vol. 9, 1993, pp. 620-626.


16. A. L. Schaeffler, “Selection of Austenitic Electrodes for Welding Dissimilar Metals”, Weld J, 1947, pp. 601-620.


17. ASME Sec IX, “Qualification Standard for Welding and Brazing Procedure”, Article II, Welding Procedure Qualification, American Society of Mechanical Engineers, 2^nd ed., 2001.


18. A. A. Omar, “Effects of Welding Parameters on Hard Zone Formation at Dissimilar Metal Welds”, Weld J, Vol. 77, 1998, pp. 86-93.