Design of precipitation (γ’) strengthened Fe-rich medium entropy alloys

A novel Fe-rich medium entropy alloy (MEA) space with a γ+γ’-only phase field at 800 °C is proposed where the volume fraction and dissolution temperature of γ’-phase can be tuned by substituting Fe for Ni/Co and Cr. The γ+γ’-structured Fe-35.5Ni-4Cr-6.3Al-3.2Ti alloy (Fe-content of 51 at.%; γ’-volum...

Ausführliche Beschreibung

Gespeichert in:

Bibliographische Detailangaben
Veröffentlicht in:	Scripta materialia 2023-10, Vol.235, p.115630, Article 115630
Hauptverfasser:	Joseph, J., Annasamy, M., Cizek, P., Vahid, A., Hodgson, P.D., Barnett, M.R., Fabijanic, D.M.
Format:	Artikel
Sprache:	eng
Schlagworte:	High temperature strength Medium entropy alloy Microstructure Precipitation strengthening Tensile properties
Online-Zugang:	Volltext
Tags:	Tag hinzufügen Keine Tags, Fügen Sie den ersten Tag hinzu!

Beschreibung
Zusammenfassung:	A novel Fe-rich medium entropy alloy (MEA) space with a γ+γ’-only phase field at 800 °C is proposed where the volume fraction and dissolution temperature of γ’-phase can be tuned by substituting Fe for Ni/Co and Cr. The γ+γ’-structured Fe-35.5Ni-4Cr-6.3Al-3.2Ti alloy (Fe-content of 51 at.%; γ’-volume fraction of 24%) after a recrystallisation and ageing treatment displays a yield strength of 902 MPa, ultimate strength of 1370 MPa and a tensile ductility of 24%. The presented alloy space progresses towards the development of Fe-rich MEAs with good strength retention (>600 °C) for heat-resistant structural applications. [Display omitted]
ISSN:	1359-6462 1872-8456
DOI:	10.1016/j.scriptamat.2023.115630