Biofunctionalization of SLM Ti-40Nb alloy through hydroxyapatite-modified plasma electrolytic oxidation coatingSubramanian, Shangavi; Praveenkumar, Kesavan; Rameshbabu, Nagumothu; Lokeshraj, Kuppusamy; Raheem, Ansheed; Jayaraj, Jayamani; Prashanth, Konda GokuldossApplied Surface Science Advances2026 / art. 100917 https://doi.org/10.1016/j.apsadv.2025.100917