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Decomposition kinetics of expanded austenite with high nitrogen contents

  • Thomas Christiansen and Marcel A. J. Somers EMAIL logo

Abstract

This paper addresses the decomposition kinetics of synthesized homogeneous expanded austenite formed by gaseous nitriding of stainless steel AISI 304L and AISI 316L with nitrogen contents up to 38 at.% nitrogen. Isochronal annealing experiments were carried out in both inert (N2) and reducing (H2) atmospheres. Differential thermal analysis (DTA) and thermogravimetry were applied for identification of the decomposition reactions and X-ray diffraction analysis was applied for phase analysis. CrN precipitated upon annealing; the activation energies are 187 kJ/mol and 128 kJ/mol for AISI 316L and AISI 304L, respectively. Isothermal stability plots for expanded austenite developed from AISI 304L and AISI 316 were obtained.


Professor Marcel A. J. Somers Technical University of Denmark (DTU) Kemitorvet building 204, DK-2800 Kgs. Lyngby Tel.: +45 45 25 22 50 Fax: +45 45 93 62 13

  1. Financial support by the Danish Research Agency under grant 26-01-0079 is gratefully acknowledged. The authors would like to thank Kristian V. Dahl for providing Thermo-Calc calculations and Finn T. Petersen (Sandvik) for providing stainless steel thin foil material.

References

[1] Y. Sun, T. Bell, Z. Kolosvary, J. Flis: Heat Treatment of Metals 26 (1999) 9.Search in Google Scholar

[2] X. Xu, L. Wang, Z. Yu, J. Qiang, Z. Hei: Metall. Mater. Trans. A 31 (2000) 1193.10.1007/s11661-000-0115-1Search in Google Scholar

[3] C. Blawert, B.L. Mordike, Y. Jirásková, O. Schneeweiss: Surf. and Coat. Techn. 116–119 (1999) 189.10.1016/S0257-8972(99)00086-9Search in Google Scholar

[4] X.B. Tian, Z.M. Zeng, B.Y. Tang, T.K. Kwok, P.K. Chu: Surf. and Coat. Techn. 128–129 (2000) 226.10.1016/S0257-8972(00)00652-6Search in Google Scholar

[5] X.Y. Li, Y. Sun, T. Bell: Z. Metallkd. 90 (1999) 901.Search in Google Scholar

[6] Y. Jirásková, C. Blawert, O. Schneeweiss: Phys. Stat. Sol. 175 (1999) 537.10.1002/(SICI)1521-396X(199910)175:2<537::AID-PSSA537>3.0.CO;2-BSearch in Google Scholar

[7] X.Y. Li, H. Dong: Mater. Sci. Techn. 19 (2003) 1427.10.1179/026708303225007924Search in Google Scholar

[8] E. Menthe, K.T. Rie: Surf. and Coat. Techn. 116–119 (1999) 199.10.1016/S0257-8972(99)00085-7Search in Google Scholar

[9] E.J. Mittemeijer: J. Mater. Science 27 (1992) 3977.10.1007/BF01105093Search in Google Scholar

[10] A.T.W. Kempen, F. Sommer, E.J. Mittemeijer: J. Mater. Science 37 (2002) 1321.10.1023/A:1014556109351Search in Google Scholar

[11] F. Liu, F. Sommer, E.J. Mittemeijer: J. Mater. Science 39 (2004) 1621.10.1023/B:JMSC.0000016161.79365.69Search in Google Scholar

[12] M.A.J. Somers, T. Christiansen, P. Møller: Case hardening of stainless steel, Danish Patent DK174707 B1 and PCT/DK03/ 00497Search in Google Scholar

[13] T. Christiansen, M.A.J. Somers: Metall. Mater. Trans. A, in press.Search in Google Scholar

[14] M.A.J. Somers: Ph.D. Thesis, T.U. Delft, 1989.Search in Google Scholar

[15] E.J. Mittemeijer, M.H. Biglari, A.J. Böttger, N.M. van der Pers, W.G. Sloof, F.D. Tichelaar: Scripta Mater. 41(6) (1999) 625.10.1016/S1359-6462(99)00143-8Search in Google Scholar

[16] E.J. Mittemeijer, M.A.J. Somers: Surf. Eng. 13(6) (1997) 483.10.1179/sur.1997.13.6.483Search in Google Scholar

[17] H.J. Grabke: Mater. Sci. Forum 154 (1994) 69.10.4028/www.scientific.net/MSF.154.69Search in Google Scholar

[18] L. Cheng, E.J. Mittemeijer: Metall. Trans. A 21 (1990) 13.10.1007/BF02656420Search in Google Scholar

[19] M.A.J. Somers, E.J. Mittemeijer: Metall. Mater. Trans. A 26 (1995) 57.10.1007/BF02669794Search in Google Scholar

[20] H. Bester, K.W. Lange: Arch. Eisenhüttenwesen 43 (1972) 207.10.1002/srin.197201792Search in Google Scholar

[21] T. Christiansen, M.A.J. Somers: Determination of concentration dependent diffusion coefficients of nitrogen in expanded austenite, in preparation.Search in Google Scholar

[22] M.A.J. Somers, R.M. Lankreijer, E. J. Mittemeijer: Phil. Mag. A 59(2) (1989) 353.10.1080/01418618908205064Search in Google Scholar

[23] R.A. Perkins: Metall. Trans. A 4 (1973) 1665.10.1007/BF02666194Search in Google Scholar

[24] R.A. Perkins, R.A. Padgett, JR, N.K. Tunali: Metall. Trans. A 4 (1973) 2535.10.1007/BF02644255Search in Google Scholar

[25] S.S. Hosmani, R.E. Schacherl, E.J. Mittemeijer: Mater. Sci. Techn. 21(1) (2005) 113.10.1179/174328405X16289Search in Google Scholar

Received: 2005-07-01
Accepted: 2005-09-05
Published Online: 2022-01-07

© 2006 Carl Hanser Verlag, München

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