Title of article :
Isothermal and Cyclic Oxidation Behavior of AISI 430 Ferritic Stainless Steel Coated with Titanium
Author/Authors :
Keshavarz, Saeed Department of Metallurgy and Materials Science - Faculty of Engineering - Shahid Bahonar University of Kerman, Kerman, Iran , Zandrahimi, Morteza Department of Metallurgy and Materials Science - Faculty of Engineering - Shahid Bahonar University of Kerman, Kerman, Iran , Ebrahimifar, Hadi Department of Materials Engineering - Faculty of Mechanical and Materials Engineering - Graduate University of Advanced Technology, Kerman, Iran
Abstract :
In order to improve the oxidation resistance of ferritic stainless steel, it is possible to deposit a protective coating onto the steel substrate. In this research, through the usage of pack cementation method a coating of titanium was applied on the surface of AISI 430 stainless steel. Scanning Electron-Microscopy (SEM), Energy-Dispersive X-ray spectrometry (EDAX) and X-ray diffraction (XRD) were used for evaluating of coating structure. Results showed that titanium coating consisted of two layers with the total thickness of 50 micron. The titanized layer consisted of TiFe, TiFe2 and Fe2TiO5 phases. For investigating the oxidation behavior of the coated and uncoated specimens, isothermal and cyclic oxidation tests were performed at 1000 C. In isothermal oxidation, the oxidation resistance of the titanium coated specimens was improved by restricting the outward penetration of chromium cation. The results of cyclic oxidation of titanium coated samples indicated that they were resistant to lamination and cracking.
Keywords :
AISI 430 stainless steel , Titanium , Pack cementation , Oxidation
