Characterization of multi-element alloy claddings manufactured by the tungsten inert gas process

Multi-element alloy filler method and the tungsten inert gas (TIG) cladding process were used to fabricate Fe–Co–Cr–Ni–Mo x multi-element alloy claddings, and the microstructure and wear properties of the claddings were studied. In the absence of Mo, the claddings formed a face-centered-cubic (FCC) solid-solution phase. When the Mo concentration was increased, the claddings comprised not only the primary FCC phase but also a phase with the characteristics of a eutectic mixture of the FCC phase and σ phase. The microhardness of the claddings increased from 210 to 465 HV upon the addition of Mo due to the formation of the σ phase. Claddings with higher microhardness showed better wear performance due to precipitation strength and solid solution strength.