Structure and phase stability in a cast modified-HP austenite after long-term ageing

• Published in: Scripta materialia Vol. 49; no. 2; pp. 117 - 122
• Main Authors: Kenik, E.A., Maziasz, P.J., Swindeman, R.W., Cervenka, J., May, D.
• Format: Journal Article
• Language: English
• Published: New York, NY Elsevier Ltd 01.07.2003; Elsevier Science
• Subjects: Analytical electron microscopy; Applied sciences; Austenite; Carbides; Constant-composition solid-solid phase transformations: polymorphic, massive, and order-disorder; Cross-disciplinary physics: materials science; rheology; Exact sciences and technology; High temperature; Materials science; Metals. Metallurgy; Phase diagrams and microstructures developed by solidification and solid-solid phase transformations; Phase transformations; Physics; Analytical electron microscopy; High temperature; Phase transformations; Carbides; Austenite; Nickel alloys; Electron diffraction; Thermal ageing; Iron alloys; X-ray spectroscopy; Chromium alloys; Experimental study; Niobium carbides; Heat treatments; Silicon alloys; Transmission electron microscopy; Phase stability; Microstructure

Phase transformations in a cast HP series alloy after long-term ageing were determined by analytical electron microscopy (AEM). Beyond the chromium and niobium carbides normally expected for the as-cast material, an eta phase enriched in Nb and Si is present, indicating phase instability at high tem...