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Coherent precipitation in a high-temperature Cr–Ni–Al–Ti Alloy |
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| Authors: | Ö N Doğan X Song D Palacio M C Gao |
| Affiliation: | 1. National Energy Technology Laboratory, 1450 Queen Ave., S.W., Albany, OR, 97321, USA 2. Department of Mechanical and Aerospace Engineering, West Virginia University, Morgantown, WV, 26506, USA 3. URS Corporation, P.O. Box 1959, Albany, OR, 97321, USA |
| Abstract: | Chromium alloys present a potential for development of new high-temperature materials. Precipitation characteristics of a Cr–5Ni–5Al–0.5Ti (at.%) alloy were investigated utilizing a series of heat treatments. XRD, SEM, and analytical TEM were used to characterize the microstructure. This study has shown that the small spherical B2-NiAl precipitates forming below 1345 °C are highly coherent and have a well-defined orientation relationship with the Cr-matrix. Also, some evidence has been presented for the formation of L21-Ni2AlTi phase within the B2-NiAl phase. |
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