Szczegóły publikacji
Opis bibliograficzny
Microstructure and resultant properties of ex-situ Alloy $625+TiB_{2}$ nanocomposites processed via suction casting as filler material for Ni-based superalloys repair applications / Łukasz RAKOCZY, Małgorzata Grudzień-Rakoczy, Grzegorz CEMPURA, Tomasz KARGUL, Ewa Rząd, Marcin MADEJ, Tomasz Dudziak, Dawid KOZIEŃ, Rafał Cygan, Adrian Graboś, Dušan Galusek // Journal of Materials Research and Technology ; ISSN 2238-7854 . — 2025 — vol. 38, s. 2820–2839. — Bibliogr. s. 2837–2839, Abstr. — Publikacja dostępna online od: 2025-08-06
Autorzy (11)
- AGHRakoczy Łukasz
- Grudzień-Rakoczy Małgorzata
- AGHCempura Grzegorz
- AGHKargul Tomasz
- Rząd Ewa
- AGHMadej Marcin
- Dudziak Tomasz
- AGHKozień Dawid
- Cygan Rafał
- Graboś Adrian
- Galusek Dušan
Słowa kluczowe
Dane bibliometryczne
| ID BaDAP | 162056 |
|---|---|
| Data dodania do BaDAP | 2025-09-09 |
| Tekst źródłowy | URL |
| DOI | 10.1016/j.jmrt.2025.08.032 |
| Rok publikacji | 2025 |
| Typ publikacji | artykuł w czasopiśmie |
| Otwarty dostęp |  |
| Creative Commons | |
| Czasopismo/seria | Journal of Materials Research and Technology |
Abstract
In this study, Alloy 625+xTiB2 (x = 1.25, 2.5, 3.75, 5.0 wt%) nanocomposites were successfully fabricated via suction casting. Their microstructure, thermal stability and selected properties were investigated using thermodynamic simulations, X-ray diffraction, light and scanning electron microscopy, scanning-transmission electron microscopy, energy-dispersive X-ray spectroscopy, dilatometry, differential scanning calorimetry, Vickers hardness testing, dry-sliding wear test, and oxidation resistance tests. The incorporation of TiB2 nanoparticles significantly influenced the dendritic microstructure of Alloy 625. The Nb-rich carbides and Laves phase precipitates were primarily located in the interdendritic regions. Upon the addition of TiB2, the particles reacted with the molten matrix during suction casting, leading to the formation of new phases, such as (Mo, Cr, Nb)3B2 and TiN. The TiB2 additions markedly enhanced the mechanical properties, increasing the hardness from 201 HV10 to 470 HV10 (at 5.0 % TiB2) and improving wear resistance by a factor of 8, reducing mass loss to 0.0241 %. Long-term annealing at 704 °C for up to 1000 h in an Ar+0.25 % SO2 atmosphere confirmed the excellent thermal stability of the composite containing 5.0 % TiB2, with a mass gain of less than 0.4 mg/cm2, over three times lower than that of the reference Alloy 625. These results highlight the potential of TiB2 reinforcement for enhancing both the mechanical and thermal performance of Alloy 625.
