CORROSION RESISTANCE AND MECHANICAL PROPERTIES OF TITANIUM-STAINLESS STEEL JOINTS BONDED BY AL, CU AND NI INTERLAYER

1 SZWED Bartłomiej
Co-authors:
1 KONIECZNY Marek 2 JAGIELSKA-WIADEREK Karina
Institutions:
1 Kielce University of Technology, Faculty of Mechatronics and Mechanical Engineering, Kielce, Poland, EU, bartlomiej_szwed@o2.pl
2 Technical University of Częstochowa, Faculty of Production Engineering and Materials Technology, Częstochowa, Poland, UE
Conference:
26th International Conference on Metallurgy and Materials, Hotel Voronez I, Brno, Czech Republic, EU, May 24th - 26th 2017
Proceedings:
Proceedings 26th International Conference on Metallurgy and Materials
Pages:
1945-1951
ISBN:
978-80-87294-79-6
ISSN:
2694-9296
Published:
9th January 2018
Proceedings of the conference were published in Web of Science and Scopus.
Metrics:
27 views / 11 downloads
Abstract

The purpose of this study is to compare the dissimilar joints of pure titanium to stainless steel achieved by different intermediate materials like aluminum, copper and nickel. Due to the metallurgical incompatibility between those base materials, it has been very difficult to produce reliable joints due to the formation of FeTi and Fe2Ti intermetallic compounds. The purpose of using the intermediate material is to reduce and even block the diffusion between titanium and stainless steel. The thickness of those filler metals were 100 μm. The microstructure of the joints were investigated using scanning electron microscopy equipped with an energy dispersive X-ray system (EDS) to determine chemical composition of joint. The maximum values of tensile strengths were obtained for samples prepared using copper as a interlayer. The highest impact energy was achieved for joints performed using aluminum as a filler metal. SEM characterization of the fracture surfaces of the joints shows that the character of fractures are brittle for the samples achieved by copper, nickel and quasi brittle for the specimen prepared using aluminum. The galvanic corrosion test was carried out in a 3.5 % NaCl solution. The potentiodynamic polarization curves show that the higher corrosion potential as well as a lower corrosion current were registered for the joints performed by nickel.

Keywords: Corrosion, mechanical properties, diffusion bonding, titanium, stainless steel
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