Effects of processing parameters on the tribocorrosion behaviour of AISI 316L fabricated by laser powder bed fusion (L-PBF)

Laser Powder Bed Fusion (LPBF) method has also begun to be widely used for the production of metal-based complex geometry engineering materials. In this method, the quantitative and qualitative effects of the processing parameters directly affect the production quality. The wear and corrosion mechanism of the material is related to the production character mentioned. The analyses made for the samples produced with the L-PBF method regarding the cumulative effect of wear and corrosion (tribocorrosion) are still quite limited in the literature. In this study, the tribocorrosion performance of 316 L L-PBF produced at different scanning speeds and building strategies was evaluated. It was seen that the change in scanning speed affected grain size and distribution, metallographic structure of the melt pool and porosity. With the increase in scanning speed, low energy density and insufficient coalescence of dust particles occurred. Thus, capillary instability and lack of fusion were observed within the structure. The decrease in scanning speed decreased surface roughness due to the regular melting of powder particles. Although more porous surfaces are generally expected to degrade tribocorrosion performance, contrary to predictions, the increase in hardness has provided significant advantages for L-PBF specimens. In this context, the specimen produced using the chessboard strategy at the highest scanning speed demonstrated a performance approaching that of the forged specimen. The tribocorrosion performances, in conjunction with OCP, are ranked by nobility as follows: C-1200, forged, C-1000, S-1200, C-800, S-1000, and S800.

Dergi

MATERIALS TODAY COMMUNICATIONS

Yıl

2025

Cilt

47

eISSN

2352-4928

DOI

10.1016/j.mtcomm.2025.113131

WoS UID

WOS:001514316100008