Investigation of effective parameters on dissimilar infrared brazing for Ti-6Al-4Vv and SS316 L by Ag Base filler metal

Document Type : Research Paper

Authors

• Esmaeil Ganjeh ¹
• Mohammad Ghasemzadeh ²

¹ Faculty ofmaterials science and engineering K.N. Toosi University of Technology

² Faculty of materials science and engineering K.N.Toosi University of Technology

Abstract

Both Ti-6Al-4V and 316L stainless steels are widely used as engineering alloys in many modern industries, especially aerospace, gas turbine engines and heat exchangers due to high mechanical properties, high creep, fatigue, and corrosion resistance. Fusion welding of these alloys is not easily possible due to their incomplete solubility in each other. Brazing is one of the best choices for joining dissimilar alloys. Infrared brazing is a novel process characterized with a high heating rate up to 500 °C/min. Accordingly, it is expected that both erosion of the substrate and excessive growth of intermetallic phases in the brazed joint are significantly decreased. This study is focused on the infrared brazing of Ti-6Al-4V and 316L stainless steel to investigate the influence of brazing parameters (brazing alloy, temperature and time) on microstructure and mechanical properties of base metals with CBS 34 (Ag-based) braze filler foils. Brazing was performed in a home-made infrared furnace at temperatures of 750, 780, 800, 850 and 900 °C for 3-5 min. Qualities of the brazed joints were evaluated by microstructure and phase constitution of the bonded joints with light optical microscope (LOM) and scanning electron microscope (SEM). Mechanical properties of the brazed joints were evaluated by hardness test. The optimum brazing parameters were at 850 °C-5 min for CBS 34 filler foils.

Keywords

• Ti-6Al-4V titanium alloy
• 316L stainless steel
• Infrared brazing
• Microstructure
• Ag filler

20.1001.1.22285946.1399.11.41.1.5

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References

[1] Shiue RK, Wu SK, Shiue JY. Infrared brazing of Ti–6Al–4V and 17-4 PH stainless steel with (Ni)/Cr barrier layer(s). Materials Science and Engineering: A. 2008;488:186-94.

[2] Lee JG, Hong SJ, Lee MK, Rhee CK. High strength bonding of titanium to stainless steel using an Ag interlayer. Journal of Nuclear Materials. 2009;395:145-9.

[3] M.K. Lee, J.G. Lee, Y.H. Choi, D.W. Kim CKR, Y.B. Lee, Hong SJ. Interlayer engineering for dissimilar bonding of titanium to stainless steel. Elsevier Science. 2010.
 

[4] Elrefaey A, Tillmann W. Brazing of titanium to steel with different filler metals: analysis and comparison. Journal of Materials Science. 2010;45:4332-8.

[5] مداح‌حسینی، س طع, مازاراتابکی م. لحیم‌کاری سخت و نرم: انتشارات جهان جام جم; 1383.

 

 

 

[6] Lee MK, Lee JG, Lee JK, Hong SM, Lee SH, Park JJ, et al. Formation of interfacial brittle phases sigma phase and IMC in hybrid titanium-to-stainless steel joint. Transactions of Nonferrous Metals Society of China. 2011;21:s7-s11.          

[7] گنجه ا سه, مقدم اص, بافقی مف. . طراحی و ساخت کوره مادون قرمز با نرخ گرمایش و سرمایش بسیار سریع تحت اتمسفر، فشار و دمای قابل کنترل1391.      

[8] Shiue R-K, Wu S-K, Yang S-HJM, A MT. Infrared Brazing of Ti50Ni50 Shape Memory Alloy and Inconel 600 Alloy with Two Ag-Cu-Ti Active Braze Alloys. 2017;48:735-44.

[9] Shiue R-K, Wu S-K, Yang S-H, Liu C-K. Infrared Dissimilar Joining of Ti50Ni50 and 316L Stainless Steel with Copper Barrier Layer in between Two Silver-Based Fillers2017.         

[10] Ganjeh E, Sarkhosh H, Khorsand H, Sabet H, Dehkordi EH, Ghaffari M. Evaluate of braze joint strength and microstructure characterize of titanium-CP with Ag-based filler alloy. Materials & Design. 2012;39:33-41.

[11] Du YC, Shiue RK. Infrared brazing of Ti–6Al–4V using two silver-based braze alloys. Journal of Materials Processing Technology. 2009;209:5161-6.    

[12] JIS, Z3192, Standard, 1988, Methods for tension and shear tests for brazed joint.

[13] T. Chang C, Shiue R. Infrared brazing Ti–6Al–4V and Mo using the Ti–15Cu–15Ni braze alloy2005.           

[14] Shiue R, Wu SK, Chan CH. The interfacial reactions of infrared brazing Cu and Ti with two silver-based braze alloys2004.

[15] Bajgholi ME, Soltani Tashi R, Akbari Mousavi AA, Heshmat Dehkordi E. An investigation on metallurgical and mechanical properties of vacuum brazed Ti-6Al-4V to 316L stainless steel using Zr-based filler metal. Journal of Advanced Materials and Processing. 2013;1:47-54.

[16] Brandes EA, Brook GB. Smithells Metals Reference Book. 7th ed: Butterworth-Heinemann; 2013. 

[17] Deng Y, Sheng G, Xu C. Evaluation of the microstructure and mechanical properties of diffusion bonded joints of titanium to stainless steel with a pure silver interlayer. Materials & Design. 2013;46:84-7.

[18] Lütjering G, Williams JC. Titanium. 2 ed: Springer-Verlag Berlin Heidelberg; 2007.

[19] گلعذار دم. اصول و کاربرد عملیات حرارتی: فولادها. دوم ed: دانشگاه صنعتی اصفهان  اردیبهشت، 1395.
 

[20] Yue X, He P, Feng JC, Zhang JH, Zhu FQ. Microstructure and interfacial reactions of vacuum brazing titanium alloy to stainless steel using an AgCuTi filler metal. Materials Characterization. 2008;59:1721-7.