Microstructural evolution and mechanical behavior of cast heat-resistant steels subjected to high service temperature
DOI:
https://doi.org/10.3989/revmetalm.2008.v44.i4.127Keywords:
Microstructure, Sigma-phase, Heat-resistant steels, Casting, Mechanical behaviorAbstract
The microstructure and mechanical properties evolution were determined in two cast heat-resistant steels upon annealing processes to induce sigma-phase formation. The research analyzed the influence of heating time at 1053 K on the formation of sigma and its relationship with selected mechanical properties, in HC-type steels (28,6Cr- 1,9Ni-0,4C) and HD-type steels (28,3Cr-5,8 Ni-0,4). The obtained results evidenced formation of sigma-phase initially along ferrite-austenite grain boundaries, but at longer times sigma precipitates in the bulk of the ferrite grains, reaching maximum values of approximately 25 % and 55 % in HC and HD respectively, after 120 hours treatment. Precipitation of sigma in both alloys resembled the Johnson-Mehl-Avrami’s mechanism stated for nucleation and growth. The mechanical behavior mainly depicted a strong decrease of toughness and a moderated increase of hardness.
Downloads
References
[1] J.R. Davis, Heat-Resistant Materials, Ed. ASM International, Metals Park, EE. UU., 1997.
[2] J.R. Davis, Stainless Steels, Ed. ASM International, Metals Park, EE. UU. 1994.
[3] P.F. Wiefer, Steel Casting Handbook, Ed. Steel Founders’ Society of America, Rocky River, EE. UU., 1980.
[4] W. Rhode, Stahl Eisen 114 (1994) 95-97.
[5] H. Baker, Alloy Phase Diagrams, Ed. ASM International, Metals Park, EE. UU., 1994.
[6] E. Kalinushkin, V. Kugurov, V. Kovalenko, D. Nikulchef e I. Brusko, Steel USSR 22 (1992) 39-42.
[7] B. Sasmal, Metall. Mater. Trans. 30 A (1999) 2.791-2.801.
[8] R.N. Gunn, Duplex Stainless Steels, Ed. Abington Publishing, Cambridge,Inglaterra, 1997, pp. 14-23.
[9] J. Sopousek y T. Kruml, Scr. Mater. 35 (1996) 689-693. doi:10.1016/1359-6462(96)00202-3
[10] A.K. Sinha, Prog. Mater. Sci. 15 (1972) 104- 109. doi:10.1016/0079-6425(72)90002-3
[11] C.C. Tseng, Y. Shen, S. Thompson, M. Mataya y G. Krauss, Metall. Mater. Trans. 25 A (1994) 1.147-1.158.
[12] W. Steinkush, Mater. Corros. 49 (1998) 69-87. doi:10.1002/(SICI)1521-4176(199802)49:2<69::AID-MACO69>3.0.CO;2-7
[13] N. Lopez, M. Cid y M. Puiggali, Corros. Sci. 41 (1999) 1.615-1.631.
[14] O. Coreño-Alonso, A. Duffus-Scott, C. Zánchez- Conejo, J. Coreño-Alonso, F. Sánchez-de Jesús y A. Bolarín-Miró, Mater. Chem. Phys. 84 (2004) 20-28. doi:10.1016/j.matchemphys.2003.09.041
[15] H. Sieurin y R. Sandstrom, Mater. Sci. Eng. 444 A (2007) 271-276.
[16] J. Still, Weld. J. 78 (1999) 61-87.
[17] G. Petzow, Metallographic Etching, Ed. ASM International, Metals Park, EE. UU., 1999.
[18] G.F. Vander Voort, Metallography and Microstructures, Ed. ASM International, Metals Park, EE. UU., 2004.
[19] R.A. Young, The Rietveld Method, Ed. Oxford University Press, Oxford, Inglaterra, 1996.
[20] L.B. McCusker, R.B. Von Dreele, D.E. Cox, D. Louër y P. Scardi, J. Appl. Crystallogr. 32 (1999) 36-50. doi:10.1107/S0021889898009856
[21] H.L. Yakel, Acta Crystallogr. B39 (1983) 20-28. doi:10.1107/S0108768183001974
[22] H.L. Yakel, Acta Crystallogr. B39 (1983) 28-33. doi:10.1107/S0108768183001986
[23] A.L. Bowman, G.P. Arnold, E.K. Storms y N.G. Nereson, Acta Crystallogr. B28 (1972) 3102-3103. doi:10.1107/S0567740872007526
[24] M.A. Rouault, Ann. Chim. - Sci. Mat. 5 (1970) 461-470.
[25] D.L. Bish y S.A. Howard, J. Appl. Crystallogr. 21 (1988) 86-91. doi:10.1107/S0021889887009415
[26] C.J. Hill, Powder Diffr. 6 (1991) 74-77.
[27] G. Restrepo, J. Lecoze, J. Garin y R. Mannheim, Scr. Mater. 50 (2004) 651-654. doi:10.1016/j.scriptamat.2003.11.021
[28] R.W. Cahn y P. Haasen, Physical Metallurgy, Ed. North Holland, Amsterdam, Holanda, 199.
Downloads
Published
How to Cite
Issue
Section
License
Copyright (c) 2008 Consejo Superior de Investigaciones Científicas (CSIC)
This work is licensed under a Creative Commons Attribution 4.0 International License.
© CSIC. Manuscripts published in both the printed and online versions of this Journal are the property of Consejo Superior de Investigaciones Científicas, and quoting this source is a requirement for any partial or full reproduction.All contents of this electronic edition, except where otherwise noted, are distributed under a “Creative Commons Attribution 4.0 International” (CC BY 4.0) License. You may read here the basic information and the legal text of the license. The indication of the CC BY 4.0 License must be expressly stated in this way when necessary.
Self-archiving in repositories, personal webpages or similar, of any version other than the published by the Editor, is not allowed.