Abstract
Three distinct second phases were observed to form heterogeneously at grain and deformation twin boundaries when Hastelloy C-276 was aged in the temperature range of 923 to 1173 K. The most abundant was the faulted, molybdenum rich μ phase. The next most abundant phase was molybdenum rich M6C carbides, and the third phase, which was observed very infrequently, was tentatively identified as theP phase. The compositions of these phases were remarkably similar, and the need to employ several electron microscopy techniques is emphasized. The origin of the μ phase is discussed in the light of its chemistry.
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Raghavan, M., Berkowitz, B.J. & Scanlon, J.C. Electron Microscopic Analysis of Heterogeneous Precipitates in Hastelloy C-276. Metall Trans A 13, 979–984 (1982). https://doi.org/10.1007/BF02643394
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DOI: https://doi.org/10.1007/BF02643394