Study on the wear characteristics of INCO939 alloy manufactured by laser powder bed fusion and casting.

KARABULUT Ş., KARAKOÇ H., BİLGİN M., Subaşı L., Dursun G., Ozaner O. C.

Tribology International, vol.194, 2024 (SCI-Expanded) identifier

  • Publication Type: Article / Article
  • Volume: 194
  • Publication Date: 2024
  • Doi Number: 10.1016/j.triboint.2024.109555
  • Journal Name: Tribology International
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Aerospace Database, Applied Science & Technology Source, Chimica, Communication Abstracts, Compendex, INSPEC, Metadex, Civil Engineering Abstracts
  • Keywords: Inconel 939, Laser-powder bed fusion, Microstructure, 3D wear surface, Wear behavior
  • Hacettepe University Affiliated: Yes


This study examines the wear characteristics of INCO939 specimens spanning temperatures from 24 °C to 600 °C. Hardness measurements revealed higher values for laser powder bed fusion (LPBF) fabricated and heat-treated samples compared to cast ones. Friction tests indicated increasing coefficient of friction (COF) values for cast samples at high temperatures, while LPBF-fabricated and heat-treated samples exhibited gradual decreases. SEM and EDS mapping analyses highlighted oxidation as a protective mechanism against wear at elevated temperatures. Surface roughness worsened with temperature for cast samples but remained superior for LPBF-fabricated ones. Heat-treated specimens showed improved surface roughness at lower temperatures, decreasing from 30 µm at room temperature to smoother surfaces at 500 °C, but increased to 44 µm at 600 °C.