Szczegóły publikacji
Opis bibliograficzny
Exploring solidification behavior, strength and steam oxidation resistance of the René 125 nickel-based superalloy with a high-volume fraction of intermetallic $\gamma$' phase / Łukasz RAKOCZY, Małgorzata Grudzień-Rakoczy, Rafał CYGAN, Grzegorz CEMPURA, Tomasz Dudziak, Tomasz KARGUL, Robert CHULIST, Ewa Rząd, Marcin GÓRNY // Intermetallics ; ISSN 0966-9795. — 2026 — vol. 188 art. no. 109025, s. 1–16. — Bibliogr. s. 15–16, Abstr. — Publikacja dostępna online od: 2025-10-21. — R. Cygan - dod. afiliacja: Consolidated Precision Products Corporation, Investment Casting Division, Rzeszów, Poland
Autorzy (9)
- AGHRakoczy Łukasz
- Grudzień-Rakoczy Małgorzata
- AGHCygan Rafał
- AGHCempura Grzegorz
- Dudziak Tomasz
- AGHKargul Tomasz
- AGHChulist Robert
- Rząd Ewa
- AGHGórny Marcin
Słowa kluczowe
Dane bibliometryczne
| ID BaDAP | 163951 |
|---|---|
| Data dodania do BaDAP | 2025-11-04 |
| Tekst źródłowy | URL |
| DOI | 10.1016/j.intermet.2025.109025 |
| Rok publikacji | 2026 |
| Typ publikacji | artykuł w czasopiśmie |
| Otwarty dostęp |  |
| Czasopismo/seria | Intermetallics |
Abstract
The as-cast microstructure, mechanical strength and oxidation resistance of the René 125 nickel-based superalloy produced via lost-wax casting was investigated via thermodynamic modeling, synchrotron X-ray diffraction, differential thermal analysis (DTA), light microscopy, scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDX), scanning-transmission electron microscopy (STEM), tensile testing, as well as steam oxidation resistance tests. The dendrites of the cast material exhibited a dual-phase microstructure with a γ matrix strengthened by cube-like secondary γ′ precipitates, with a mean volume fraction (Vf) of 46.1 % and size of 0.424 μm. In the interdendritic regions, the secondary γ′ precipitates were characterized by a slightly lower Vf of 45.4 % and a larger average size of 0.480 μm. The Vf of (Ta,Ti,W)C carbides was 2.8 % (±0.05 %). Based on thermodynamic simulations and microstructure investigations, it was concluded that, during the final solidification stage, the limited solubility of alloying elements such as B, Zr, and Hf leads to the precipitation of minor phases, i.e. Ni7(Hf,Zr)2 and (Cr,Mo,W)5B3 borides. The ultimate tensile strength, yield strength and elongation of the produced casting were found to be in the range of 1214–1243 MPa, 940–975 MPa and 7.19–7.23 %, respectively. The mass gain after steam oxidation at 760 °C for 1000 h was equal to 0.18 mg/cm2, providing excellent stability in the as-cast condition.
