Rapid decomposition of lamellar microstructure and enhanced hot workability of an as-cast triphase Ti–45Al–6Nb–1Mo alloy via one-step alpha-extrusion & annealing

This study proposed a new alpha-extrusion & annealing route to rapidly break down the coarse as-cast lamellar microstructure of a Nb-rich β-solidifying γ-TiAl alloy. It was found that one-step alpha-extrusion could induce widespread decomposition of lamellar structures via a precipitation reacti...

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Veröffentlicht in:	Materials science & engineering. A, Structural materials : properties, microstructure and processing Structural materials : properties, microstructure and processing, 2021-01, Vol.801, p.140438, Article 140438
Hauptverfasser:	Niu, H.Z., Tong, R.L., Chen, X.J., Zhang, T.B., Zhang, D.L.
Format:	Artikel
Sprache:	eng
Schlagworte:	Alpha-extrusion Annealing Banded structure Chemical precipitation Decomposition reactions Die forming Dynamic recrystallization Elongated structure Formability Grains Hot workability Lamellar structure Microstructural decomposition Microstructure Phase transformation Phase transitions Superplasticity TiAl intermetallics Titanium base alloys
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