Document Type : Research Paper


1 Technology University

2 Department of Mateials / University of Technology

3 university of technology . material Dep.


Brazing fillers for joining applications are essential to advanced material design and fabrication. Several types of brazing fillers have been developed in recent decades to join similar or different engineering materials. Important parts of automotive and aircraft components, including steel, are often joined by brazing. In this study, Similar samples of martensitic stainless steel were welded by the brazing method, using effective silver-based metal alloys. The brazing welding is done in inert gas atmosphere furnaces, by placing the samples in a special container filled with argon gas during the welding period and at a flow rate (10 to 15 minutes) inside a cylindrical furnace. Three types of metal alloys (silver, copper, and titanium) with different weight ratios of Ag, Cu, and Ti were used with a fixed welding time (10 minutes) at an appropriate temperature for each joint. A set of examinations and tests were conducted to find out the microscopic structure of the bonding site and the extent of the binder overlapping with the base material.  Optical microscopy was used to study the microstructure of the weld joint. Optical and scanning electron microscopy (SEM) is used to study the joint microstructure. All joints of samples exhibited continuous bonding between the base metal and the filler metal, good wetting between the surfaces, and it was also noticed that the higher the proportion of titanium, the better the wetting between the surfaces., the greater the percentage of diffusion of the filler elements and the strength of the bonding with the base metal. The use of titanium-containing fillers in brazing is good for bonding in turbine blades of martensitic steel.

Graphical Abstract


  • Martensitic stainless steel was welded by the brazing method
  • The mechanical properties were evaluated by the single-shear experiment.
  • Optical microscopy was used to study the microstructure of the weld joint.


Main Subjects

[1] Brazing Handbook, 5th ed., American Welding Society, Miami, Fla, 2007
[2] Roberts, P. Industrial Brazing Practice, 2nd ed.; CRC Press: Boca Raton, FL, USA, 2013.
[3] M. Way,  J. Willingham, R.  Goodall,  Brazing Filler Metals . Int. Mater. Rev.     65 (2020) 257–285.
[4] S.Simões,Diffusion Bonding and Brazing of Advanced Materials. Metals. 8 (2018) 959.
[5] T. Zaharinie, F. Yusof, M. Hamdi, T. Ariga, R. Moshwan , Effectof brazing temperature on the shear strength of Inconel 600 joint . Int J Adv Manuf Technol, 73 (2014) 1133–1140.
[6] J. de Prado, M. Sánchez, A. Ureña, Wettability study of a CuTi alloy on tungsten and EUROFER substrates for brazing components of DEMO fusion reactor. Mater. Des. 99 (2016) 93-101.
[7] J. Lemus-Ruíz, J.A. Verduzco,  J. González-Sánchez,  V.H. López, Characterization, shear strength and corrosion resistance of self joining AISI 304 using a Ni Fe-Cr-Si metallic glass foil. J. Manuf. Processes. 223 (2015) 16–21.  https://doi.10.1016/j.jmatprotec.2015.03.038
[8] W. Jiang, J. Gong, S.T. Tu,  A new cooling method for vacuum brazing of a stainless steel plate-fin structure.        Mater.Des. 31 (2010) 648–653. https://doi.10.1016/j.matdes.2009.04.039
[9] Q. Ma,  Y. Li,  N. Wu,  J. Wang,  Microstructure of Vacuum-Brazed Joints of Super-Ni/NiCr Laminated Composite Using Nickel-Based Amorphous Filler Metal. J. Mater. Eng. Perform. 22 (2013) 1660–1665.
[10] J. Chen,  Y. Fu, Q. Li,  J. Gao,  Q. He,  Investigation on induction brazing of revolving heat pipe grinding wheel. Mater. Des. 2017, 116, 21–30. https://doi.10.1016/j.matdes.2016.11.057
[11] N. Eustathopoulos, F. Hodaj, O. Kozlova, The Wet ting Process in Brazing. Advances in Brazing Science, Technology and Applications .(2013) 3–30. https://doi.10.1533/ 9780857096500.1.3
[12]  W. Jiang, J. M. Gong, S. T. Tu, Effect of Holding Time on Vacuum Brazing for a Stainless Steel Plate-Fin Structure. Mater. Des. 31 (2010) 2157–2162. https://doi.10.1016/j.matdes.2009.11.001
[13] I. Alfred, M. Nicolaus, J. Hermsdorf, S. Kaierle, K. Möhwald, H.-J. Maier, V. Wesling ,Advanced High Pressure Turbine Blade Repair Technologies. Procedia CIRP. 74 (2018) 214–217. https://doi.10.1016/j.procir.2018.08.097.
[14] M. Nicolaus, B. Rottwinkel, I. Alfred, K. Möhwald, C. Nölke, S. Kaierle, H. J. Maier, V. Wesling, Future Regeneration Processes for High-Pressure Turbine Blades. CEAS Aeronautical Journal.  9 (2017) 85–92. https://doi.10.1007/s13272-017-0277-9.
[15] M. Sakai, T. Sasaki, Y. Miyazawa, Mechanism of Void Formation During Brazing of Ni Paste Brazing Filler Metal. Mater. Sci. Forum. 1016 (2021) 1218–1222.  https://doi.10.4028/