Experimental investigation on wear resistance and corrosion behavior of nickel-aluminum bronze alloy fabricated by wire-arc additive manufacturing

This paper discusses the differences in the microstructure, mechanical properties, wear resistance, and corrosion behavior of nickel-aluminum bronze (NAB) alloys fabricated via wire arc additive manufacturing (WAAM) versus casting. The grain size of the WAAM-NAB alloy is smaller than that of the as-cast NAB alloys; furthermore, the precipitation of the large size kI phase is completely suppressed while the remaining precipitated k phases are limited and reduced in size. Compared with the cast alloy, the WAAM-NAB alloy indicates a higher bending and tensile strength by 46% and 18%, respectively. The coefficient of friction of WAAM-NAB alloy is 56% lower than cast alloys. Additionally, the WAAM-NAB alloy shows greater corrosion resistance against seawater, in that it only exhibited residual b phase corrosion, whereas the cast alloy sustained severe selective-phase corrosion. (c) 2023 The Author(s). Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).