Interfacial Mechanical Behavior and Electrochemical Corrosion Characteristics of Cold‐Sprayed and Hot‐Rolled Titanium/Stainless‐Steel Couples

Abstract

Fully dense Ti/stainless‐steel couples are produced via cold‐spraying and subsequent hot‐rolling at various temperatures. Accordingly, the authors examined the nanoindentation hardness and modulus as well as elemental distributions corresponding to the interfacial regions. Moreover, the electrochemical corrosion behavior of the Ti part prior to and following hot‐rolling is also investigated. Our results shown that the couples hot‐rolled at 950 °C can successfully avoid both prior defects in the Ti and intermetallic compounds at the interface. Hot‐rolling has a significant influence on the interfacial mechanical behavior. The cold‐sprayed and hot‐rolled Ti parts exhibit excellent electrochemical corrosion resistance in 3.5 wt% NaCl solutions, which is identical to that of normal pure Ti.