Abstract
The microstructural features, mechanical properties, and corrosion performance of Incoloy 825 manufactured using the wire arc additive manufacturing (WAAM) process are examined. Metallographic observations revealed that the microstructure was mainly dendritic, along with the presence of precipitates and laves phases. The average tensile properties of the WAAM-printed Incoloy 825 specimens are YS-274 ± 6 MPa, UTS-576 ± 15 MPa & EL-48 ± 1.5% and YS-261 ± 9 MPa, UTS-560 ± 19 MPa & EL-53.5 ± 2% in horizontal and vertical orientations, respectively. Microhardness values varied from bottom to top (226–262 HV). The electrochemical corrosion test outcomes in 3.5% NaCl solution highlighted the stability of the WAAM-printed Incoloy 825 samples with an outstanding corrosion rate of 0.59–0.70 mils per year (mpy). Experimental results confirmed the comparable mechanical properties and superior corrosion resistance of Incoloy 825 for marine environments.
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