Formation of AlN in the N Added 18Cr Ferritic Stainless Steels

Abstract:

Al addition is known to enhance corrosion resistance and high temperature properties in ferritic and austenitic stainless steels. Due to the addition of Al, formation and characteristic of nitride were studied in Al added 18Cr stainless steels. The phase diagram and segregation were estimated with addition of Al in 18Cr stainless steels by the Thermo-calc program. Formation behavior of the AlN phase was studied by observing the solid/liquid interface through directional solidification and the phase characterization was performed by XRD in the extracted precipitates from the matrix. It was confirmed that the AlN phase formed at the cell boundary from the liquid in 3 and 5 wt.% Al added 18Cr stainless steels.

• Periodical: Materials Science Forum (Volumes 486-487)
• Pages: 428-431
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.486-487.428
• Online since: June 2005
• Authors: H.C. Kim, Je Hyun Lee, Y.G. Heon, Chang Yong Jo, Jae Won Kim, Sung Gab Kim
• Keywords: Aluminum Nitride (AlN), Ferritic Stainless Steel (FSS), Segregation, Solidification

References

[1] R.A. Lula, Stainless Steel, 5h Edition, American Society for Metals, Metals Park, OH, (1993) p.10.

[2] N. Fujita, Keiichi Ohmura, A. Yamamoto, Matrials Sci. Eng. A 351 (2003) 272.

[3] M. Yamanaka, H, Itoh, K. Yohida, Y. Otoguro, and T. Yamazaki, 97th ISIJ Meeting, April (1979) S343.

[4] H.G. Read, M. Murakanmi, Applied Surface Science, 94/95 (1996) 334.

[5] I.M. Moustafa, M.A. Moustafa, A.A. Nofal, Materials Letters, 42 (2000) 371.

[6] J.H. Lee and J.D. Verhoeven, J. Phase Equil. 15 (1994) 136.

[7] I.S. Jung, M.C. Kim, J.H. Lee, M.H. Oh, D.M. Wee, Intermetallics, 7 (1999) 1247.

[8] J.D. Verhoeven, J.H. Lee, F.C. Labbs, and L.L. Jones, J. Phase Equil. 12(1), (1991) 15.