Szczegóły publikacji
Opis bibliograficzny
Solidification behavior of René 77 nickel-based superalloy produced via vacuum lost-wax casting and its resultant microstructure, strength and oxidation resistance / Małgorzata Grudzień-Rakoczy, Łukasz RAKOCZY, Grzegorz CEMPURA, Tomasz Dudziak, Ewa Rząd, Konrad Chrzan, Rafał Cygan // Scientific Reports [Dokument elektroniczny]. — Czasopismo elektroniczne ; ISSN 2045-2322. — 2025 — vol. 15 iss. 1 art. no. 18237, s. 1–17. — Wymagania systemowe: Adobe Reader. — Bibliogr. s. 16–17, Abstr. — Publikacja dostępna online od: 2025-05-25
Autorzy (7)
- Grudzień-Rakoczy Małgorzata
- AGHRakoczy Łukasz
- AGHCempura Grzegorz
- Dudziak Tomasz
- Rząd Ewa
- Chrzan Konrad
- Cygan Rafał
Słowa kluczowe
Dane bibliometryczne
| ID BaDAP | 160348 |
|---|---|
| Data dodania do BaDAP | 2025-06-23 |
| Tekst źródłowy | URL |
| DOI | 10.1038/s41598-025-02664-x |
| Rok publikacji | 2025 |
| Typ publikacji | artykuł w czasopiśmie |
| Otwarty dostęp |  |
| Creative Commons | |
| Czasopismo/seria | Scientific Reports |
Abstract
The as-cast microstructure, physico-chemical properties, mechanical characteristics, and oxidation resistance of the René 77 nickel-based superalloy, produced via lost-wax casting, were analyzed. The experiments included thermodynamic simulations, dilatometry, differential scanning calorimetry (DSC), light and scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDX), scanning-transmission electron microscopy (STEM), hardness and tensile tests, as well as steam oxidation tests. According to DSC analysis, the superalloy began to solidify at 1355 °C forming γ matrix dendrites and, during subsequent cooling, the first strengthening phase, namely MC carbides, precipitated directly from the liquid at 1307 °C. Dilatometry results indicated that the onset of γ′ dissolution led to a significant increase in the coefficient of thermal expansion above 730 °C. The dendritic regions of the casting exhibited a relatively uniform microstructure, characterized by near cube-like secondary γ′ precipitates, with a volume fraction of 27.7% (± 1.9%) and an average size of 0.278 μm. In the interdendritic spaces, the secondary γ′ precipitates displayed both a higher volume fraction (42.2% ± 2.1%) and larger mean size (0.493 μm). Additionally, eutectic γ − γ′ islands, (Ti, Mo)C carbides, and (Mo, Cr)3B2 borides were detected. The ultimate tensile strength, yield strength and elongation were in the range of 935–1050 MPa, 737–762 MPa and 3.6–9.3%, respectively.
