On Selected Properties of Inconel 625/Ti6Al4V Explosively Welded Clad

• Published in: Journal of materials engineering and performance Vol. 31; no. 9; pp. 7080 - 7087
• Main Authors: Wojewoda-Budka, Joanna, Bugajska, Monika, Guspiel, Jan, Terlicka, Sylwia, Bigos, Agnieszka, Wierzbicka-Miernik, Anna, Szulc, Zygmunt
• Format: Journal Article
• Language: English
• Published: New York Springer US 01.09.2022
• Subjects: Characterization and Evaluation of Materials; Chemistry and Materials Science; Corrosion and Coatings; Engineering Design; Materials Science; Quality Control; Reliability; Safety and Risk; Technical Article; Tribology; potentiodynamic polarization technique; corrosion; Inconel 625; thermal expansion; Ti6Al4V; explosive welding
• ISSN: 1059-9495; 1544-1024
• DOI: 10.1007/s11665-022-06897-z

This study presents the microstructure and physicochemical properties of explosively welded Inconel 625 and Ti6Al4V platers, which were investigated by scanning electron microscopy, corrosion resistance, and dilatometric measurements. Firstly, the corrosion behavior of Ti6Al4V was tested in sodium sulfate and sodium chloride solutions using potentiodynamic polarization and electrochemical impedance spectroscopy techniques. The experimental results were compared with the data obtained from computer simulation. The investigated corrosion resistance of the explosively welded Inconel 625/Ti6Al4V system in different solutions showed that this system exhibited significantly higher corrosion resistance in NaCl solution than in sodium sulfate. In addition, the corrosion potential of the Ti6Al4V surface tested in sodium chloride is slightly higher compared to the value obtained for the second solution. Moreover, the pioneering dilatometric measurements have been carried out in the temperature range of 298-873 K to determine the linear coefficient values of thermal expansion (α) of investigated samples cut along and perpendicular to the direction of the explosion. They showed close values regardless of the cutting direction. Additionally, α possessed the linear character in the whole investigated temperature range, excluding the phase transitions within the bonded plates.