Color metallography; a suitable method for characterization of martensite and bainite in multiphase steels

Document Type : Research Paper

Authors

Department of Materials Engineering, Isfahan University of Technology, Isfahan 84156-83111, Iran

Abstract

Color metallography is a useful method for characterizing microstructures of steels with multiple phases. In this paper, application of three different color etching techniques for a bainitic-martensitic steel is reported. Comparisons between the results showed that 10% Na2S2O5 aqueous solution was the best etchant for distinguishing martensite, bainite and ferrite phases. The obtained micrographs were clear and sharp. Nanoindentation test was also carried out in order to approve the results of color metallography.

Keywords

References

1- S. Bandoh, O. Matsumura and Y. Sakuma: ISIJ Int., 28(1988), 569.
2-I.Kardos, Z. Gacsi and P. J. Szabo: Mater. Sci. Forum., 537(2007), 389.
3- E. Girault, P. Jacques, Ph. Harlet, K. Mols, J. Van Humbeeck, E. Aernoudt and F. Delannay: Mater. Charact., 40(1998), 111.
4- K. Burikova and G. Rosenberg: Metal., 19(2009), 21.
 5- A. K. De, M. C. Mataya, J. G. Speer and D. K. Matlock: Adv. Mater. Process., 161(2003), 27.
6- G. F. Vander Voort: Atlas of time - temperature diagrams for irons and  steels, ASM International,Ohio, (1980), 808.
7- D. A. Porter and K. E. Easterling: Phase transformation in metals and alloys, 2nd edition, Chapman & Hall, (1992), 514.
8- M. Shaira, N. Godin, P. Guy, L. Vanel and J. Courbon: Mater. Sci.Eng.A., 492(2008), 392.
9- F. S. LePera: Metallography., 12(1979), 263.
10 - F. S. LePera:  JOM., 32(1980), 38.
11- E. Beraha and K. E. Shpigler: Color Metallography, ASM International,Ohio, (1992), 174.
12- G. F. Vander Voort: ASM Handbook, Vol.9, ASM International,Ohio, (2004), 1184.
13- A. K. De, D. C. Murdock, M. C. Mataya, J. G. Speer and D. K. Matlock: Scripta Mater., 50(2004), 1445.
14- D. L. Johannsen, A. Kyrolinen and P. J. Ferreira: Metall. Mater.
Trans. A., 37(2006), 2325.

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