| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1498743 | Scripta Materialia | 2013 | 4 Pages |
Abstract
The stability of coherent L12-ordered Ni3(Al,Ti) intermetallic precipitates was studied in Fe–14Cr–32Ni–3Nb–(3–4)Al–(1–3)Ti (wt.%) based alumina-forming austenitic stainless alloys. Computational thermodynamics predicted the formation of multi-intermetallic phases, including L12 and β-NiAl (B2), in an austenite matrix below ∼900 °C. Microstructure characterization revealed a significant stabilization of the L12 phase by Zr addition, with the amount of L12 increasing with increasing Ti addition. However, the Ti addition also degraded the oxidation resistance. Further additions of C and B successfully improved both creep and oxidation properties.
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Authors
Yukinori Yamamoto, Govindarajan Muralidharan, Michael P. Brady,