Effect of interlayer material and rolling temperature on microstructures and mechanical properties of titanium/steel clad plates

• Published in: Materials science & engineering. A, Structural materials : properties, microstructure and processing Vol. 749; pp. 241 - 248
• Main Authors: Li, B.X., Chen, Z.J., He, W.J., Wang, P.J., Lin, J.S., Wang, Y., Peng, L., Li, J., Liu, Q.
• Format: Journal Article
• Language: English
• Published: Lausanne Elsevier B.V 11.03.2019; Elsevier BV
• Subjects: Carbides; Clad plate; Fracture surfaces; Hot rolling; Interlayer material; Interlayers; Interstitial free steels; Mechanical properties; Microstructure; Roll bonding; Rolling temperature; Scanning electron microscopy; Shear strength; Shear tests; Sigma phase; Steel plates; Tensile tests; Titanium; X-ray diffraction; Mechanical properties; Clad plate; Rolling temperature; Microstructure; Interlayer material
• ISSN: 0921-5093; 1873-4936
• DOI: 10.1016/j.msea.2019.02.018

Titanium (Ti)/steel clad plates with interlayer material of interstitial free (IF) steel, vanadium (V) and IF steel + V were successfully fabricated by hot roll bonding method at temperature of 850, 900 and 950 °C. Tensile shear test and tensile test were performed to evaluate the mechanical properties of the Ti/steel clad plates. The interfaces and the fracture surfaces of Ti/steel clad plates were carefully characterized by scanning electron microscopy, energy-dispersive spectroscopy and X-ray diffraction. The results reveal that the interlayer materials have influence on the compounds at the Ti/steel interfaces. Carbides are detected at the interfaces of Ti/steel with single IF steel or V interlayer. The formation of carbides impairs the shear strength of clad plates. σ phases instead of carbides are observed at the interface of Ti/steel clad plate with IF steel + V interlayer, which is beneficial for the tensile shear strength. Rolling temperature also has significant influence on mechanical properties of Ti/steel clad plates. The thickness of σ phase increases with the increase of rolling temperature. Thick σ phases impair the mechanical properties of the Ti/steel clad plate.