Post heat treatment optimization of cold spray additive manufactured Inconel 718

Karakas A., Ataee A., Rathi A., Fenercioglu T. O., ERDOĞAN C., YALÇINKAYA T.

SCIENTIFIC REPORTS, cilt.15, sa.1, 2025 (SCI-Expanded, Scopus) identifier identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 15 Sayı: 1
  • Basım Tarihi: 2025
  • Doi Numarası: 10.1038/s41598-025-90723-8
  • Dergi Adı: SCIENTIFIC REPORTS
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, BIOSIS, Chemical Abstracts Core, MEDLINE, Veterinary Science Database, Directory of Open Access Journals
  • Orta Doğu Teknik Üniversitesi Adresli: Evet

Özet

The cold spray technique has recently emerged as an additive manufacturing method for producing free-standing parts, in addition to its use in repair and coating applications. Manufacturing relatively hard alloys such as Inconel 718 remains challenging and requires careful optimization of process parameters and post-heat treatment (HT) conditions. This work investigates the optimal post-heat treatment procedure for cold-sprayed Inconel 718 parts, focusing on both temperature and duration of the heat treatment process. Cold-sprayed parts are initially heat-treated at 968 degrees C, 1066 degrees C, and 1200 degrees C for 1 hour, followed by a conventional aging procedure. Results indicate that heat treatment at 1200 degrees C reduces porosity and enhances ductility in tensile tests. Furthermore, to assess the effect of HT closer to the material's melting point, samples are heat-treated above 1200 degrees C. Further analysis of the HT temperatures reveals that heat treatment at 1260 degrees C yields the lowest porosity values and shows strong potential to meet manufacturing standards.