Aaron Den Boer - 701 Seminar - November 20 2012 - Course Notes

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Nb–C Phase Diagram FCC HCP M 2 C carbides, HCP structure (Nb, Fe,…) 2 (C,N,Va) 1 MC carbides, FCC structure (Nb, Fe,…) 1 (C, N, Va) 1 12
Characterization of FeNb + 0.12 wt% C 5 1 2 4 3 Location Elements (at%) Predicted Fe Nb Ti Al Si Mn Phase 1 7.60 91.92 0.48 0.00 0.00 0.00 BCC 2 40.93 52.91 0.40 0.89 4.45 0.42 µ 3 35.34 62.16 0.89 0.48 0.83 0.31 η 4 1.92 96.94 1.14 0.00 0.00 0.00 HCP 5 11.09 13.94 0.94 72.94 0.92 0.18 Al<strong>20</strong>3 FeNb + 0.12 wt% C Phase Image Analysis TCFE2 EBSD HCP (Red) 2.10 1.83 3.21 BCC (Yellow) 14.70 24.10 9.19 µ 80.80 73.85 87.6 Total 97.60 99.78 100 13
Page 1 and 2: Characterization and Dissolution of
Page 3 and 4: Introduction • Microalloying prod
Page 5 and 6: Introduction • How do these fine
Page 7 and 8: Fe-Nb Phase Diagrams TCFE2 TCFE6 Eu
Page 9 and 10: Problem Definition • Coarse Nb(C,
Page 11: Characterization of FeNb + 0.12 wt%
Page 15 and 16: Characterization of FeNb + 0.7 wt%
Page 17 and 18: Introduction to Model • To solve
Page 19 and 20: It’s more complicated… • If v
Page 21 and 22: Results: Convective Fluid 21
Page 23 and 24: Conclusions • Thermodynamic datab
Page 25 and 26: Meta-stable phase, η 2 1 Location
Page 27: FeNb solidified at CBMM 27

Aaron Den Boer - 701 Seminar - November 20 2012 - Course Notes

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