Metalografía a color en aleaciones Al-Si comerciales. Optimización de las técnicas de caracterización microestructural mediante microscopía óptica de reflexión

B. Suárez-Peña; J. Asensio-Lozano; G. F. Vander-Voort

doi:10.3989/revmetalm.1013

Authors

B. Suárez-Peña Departamento de Ciencia de los Materiales e Ingeniería Metalúrgica, E.U.I.T.I. de Gijón. Universidad de Oviedo
J. Asensio-Lozano Departamento de Ciencia de los Materiales e Ingeniería Metalúrgica, E.T.S.I.M.O. Universidad de Oviedo
G. F. Vander-Voort Senior Research Consultant, Metallography Specialist

DOI:

https://doi.org/10.3989/revmetalm.1013

Keywords:

Colour metallography, Al-Si alloys, Weck reagent, Optical microscopy

Abstract

The present demand on alloy production with improved quality requires the optimization of the metallographic procedures used on its characterization. Traditional etching techniques commonly employed for phase identification by optical metallography in aluminium alloys are not always suitable for a detailed analysis of existing phases, nor to accurately predict the mechanisms that govern the solidification process in certain detail. This work explores the potential of colour metallography to reveal at its best as-cast microstructures in Al-Si 12 alloys. For this purpose a colour etching technique, specifically developed for aluminium alloys and based on the Weck reagent. The application of such etchant has allowed the qualitative characterization of the microstructure. And it has also shown the advantages of colour metallography over black and white (B&W) etching techniques.

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References

[1] E.Weck y E. Leistner, Metallographic Instructions for Colour Etching by Immersion III, D.V.S. Verlag GmbH, Dusseldorf, Alemania, 1986, pp. 3-82.

[2] F. Mondolfo, Aluminium Alloys: Structure and Properties, Butterworth, London, 1976, p. 534.

[3] H. Liao, Y. Sun y G. Sun. Mater. Sci. Eng. A 335 (2002) 62-66. doi:10.1016/S0921-5093(01)01949-9

[4] J. E. Gruzlesky,Microstructure development during metalcasting, AFS Des Plaines, Illinois, 2000, pp 230-234.

[5] H. C. Liao y G. X. Sun, Scr. Mater. 48 (2003) 1.035-1.039.

[6] T. H. Sritharan y J. LI, J.Mater. Process. Technol. 63 (1997) 585-589. doi:10.1016/S0924-0136(96)02688-X

[7] Metallography and Microstructures, ASM Speciality Handbook, ASM Int., 2004, pp. 227-313.

[8] D. SanMartin, P.E.J. Rivera- Diaz del Castillo, E. Peekstok y S. Van Der Zwaag, Mater. Char. 58 (2007) 455-460. doi:10.1016/j.matchar.2006.06.009

[9] A. C. Somasekharan y L. E.Murr. J.Mater. Sci. 41 (2006) 5.365-5.370.

[10] Metallography and Microstructures, ASM Specialty Handbbok, ASM International, pp. 297-298.

[11] H. Klemm, Color Etching of the Fine Structure of Metals with Sodium Thiosulfate, Metalkundliche, Verlag Technik, vol 45, Berlin, 1952.

[12] H. Klemm, Pr. Metallogr. 5 (1968) 163-167.

[13] E. Beraha, J. Iron Steel Inst Jpn. 203 (1965) 454-458.

[14] E. Beraha, J. Iron Steel Inst Jpn. 204 (1966) 248-252.

[15] E. Beraha, Met. Prog. 90 (1966) 135-140.

[16] E. Beraha, Met. Prog. 90 (1966) 13-17.

[17] E. Beraha, J. Iron Steel Inst Jpn. 205 (1967) 866-870.

[18] J. R. Kilpatrick, A.O. Benscoter y A.R.Marder, Met. Prog. (1971) 79-84.

[19] E.Weck y E. Leistner,Metallographic Instructions for Colour Etching by Immersion, Part I: Vol 77, Klemm Colour Etching, D.V.S. Verlag GmbH, Alemania, 1982, pp. 3-60.

[20] E.Weck y E. Leistner,Metallographic Instructions for Colour Etchants by Immersion, Part II: Vol 77/ II, Beraha Colour Etchants an their Different Variants, D.V.S. Verlag GmbH, Dusseldorf, Alemania, 1983 pp 3-84.

[21] G.F. Vander Voort, Metallography and Microstructures, ASM Specialty Handbbok, ASM International, pp. 493-562.

[22] J. A. Pero-Sanz, Ciencia e Ingeniería de Materiales, CIE DOSSAT 2000,Madrid, España, 2000, pp. 202-205.

[23] J. E. Gruzlesky,Microstructure development during metalcasting, AFS Des Plaines, Illinois, 2000, pp. 100-114.

[24] J. C. Jacquet y W. Hotz, Cast. Met. 4 (1992) 200-225.

[25] H. P. Godard, W. P. Jepson, M. R. Bothwell y R. L. Kane, The corrosion of light metals, Ed. John Wiley and Sons, New York, USA, 1967, pp. 3-198.

[26] M. Pourbaix, Aluminium Atlas of Electrochemical Equilibrium in Aqueous Solutions, Ed. Pergamon, Oxford, UK, 1966, pp. 168-176.

[27] S. A. Kulinich, A. S. Akhtar, K. C.Wong y K. A. R. Mitchell, Thin Solid Films 515 (2007) 8.386-8.392.

[28] Aluminum and aluminum alloys, ASM Specialty Handbbok, ASM International, pp. 579-590. [29] Corrosion of Aluminum and Aluminum Alloys, ASM Specialty Handbbok, ASM Internacional, pp. 25-45.

[30] G.F. Vander Voort, Metallography and Microstructures, ASM Specialty Handbbok, ASM International, pp. 495-496.

[31] J. Chapon y W. Szkliniarz, Mater. Charact. 46 (2001) 149-154. doi:10.1016/S1044-5803(01)00117-6

[32] J. Asensio-Lozano y B. Suárez-Peña, Scr.Mater. 54 (2006) 943-947. doi:10.1016/j.scriptamat.2005.10.067