Akademik Veri Yönetim Sistemi
Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science, 2026 (SCI-Expanded, Scopus)
Abstract: Limited studies exist on the application of welded duplex stainless steel as a temporary implant material. Various methods have been employed to enhance the biocorrosion resistance and biocompatibility of metallic implant materials. In this study, the effect of welding heat input on the biocorrosion behavior and biocompatibility of AISI 2205 duplex stainless steel joined by laser beam welding was investigated. Microstructure and microtexture characterization analyses were also conducted. Electrochemical tests were performed in a simulated body fluid (SBF) environment to evaluate the biocorrosion properties of the welded samples. The results indicated that increasing the welding heat input improved corrosion resistance. This improvement was attributed to the increased austenite volume fraction, larger grain size, and a higher high-angle grain boundary (HAGB) ratio resulting from the higher heat input. Furthermore, it was observed that increasing the welding heat input decreased the water contact angle of the weld zone. In vitro biocompatibility studies were carried out using the MTT assay with an hFOB cell line. Based on the results obtained on days 7, 14, 21, and 28 of incubation, cell viability remained at acceptable levels across all groups. Metal ion release (Cr, Fe, Ni, Mn, and Mo) into the hFOB medium was analyzed using inductively coupled plasma mass spectrometry (ICP-MS), and the results showed that higher heat input reduced ion release. Finally, bacterial adhesion tests performed with Escherichia coli revealed that the welding process influenced bacterial attachment. Specifically, higher heat input promoted bacterial adhesion, which was likely associated with the increased surface roughness.