Influence of Partition Chessboard Scanning Dimension on the Surface Quality and Corrosion Resistance of Laser Powder Bed Fusion‐Fabricated Titanium‐Based Nanocomposites

The study investigates the effects of partition chessboard scanning dimension on the forming quality and the electrochemical corrosion mechanism of titanium‐based nanocomposite materials. The research results indicate that as the partition chessboard scanning dimension increases (2, 5, 8, 11 mm), the average surface roughness ( R a value) of the TC4‐0.5GO‐7Mo nanocomposite material shows an increasing trend. The average Ra values for TC4‐0.5GO‐7Mo PCSD2 , TC4‐0.5GO‐7Mo PCSD5 , TC4‐0.5GO‐7Mo PCSD8 , and TC4‐0.5GO‐7Mo PCSD11 are 5.39, 5.93, 6.61, and 9.32 μm, respectively. Compared to TC4‐0.5GO‐7Mo PCSD2 , the average Ra value of TC4‐0.5GO‐7Mo PCSD11 increases by 72.9%. Different partition chessboard scanning dimensions result in varying degrees of residual stress, among which the residual stress value of TC4‐0.5GO‐7Mo PCSD2 is the lowest, at only 295.7 MPa. The TC4‐0.5GO‐7Mo PCSD5 sample exhibits significant electrochemical stability, with the highest polarization corrosion potential of −0.280 V, and the Nyquist plot shows the largest radius of the capacitive reactance arc, demonstrating the best resistance to electrochemical corrosion.