Superplastic behaviour of an AZ61 alloy processed by equal channel angular extrusion

Authors

  • M. Eddahbi Departamento de Metalurgia Física, Centro Nacional de Investigaciones Metalúrgicas, CSIC
  • O. A. Ruano Departamento de Metalurgia Física, Centro Nacional de Investigaciones Metalúrgicas, CSIC

DOI:

https://doi.org/10.3989/revmetalm.2006.v42.i2.15

Keywords:

Superplasticity, Severe plastic deformation, Magnesium alloys, Microstructure

Abstract


This study is concerned with microstructural and mechanical characterization of the superplastic behaviour of a magnesium base AZ61 alloy processed by equal channel angular extrusion (ECA). Microscopic examinations showed that the microstructure after ECA was homogeneous and the grain size was about 5 mm. The extruded material showed better mechanical properties than the rolled material. The strain rate sensitivity exponent, at 250 ºC, was 0.5 at strain rates ranging from 10-4 to 5 . 10-4 s-1. Under these conditions, the maximum elongation obtained was 250 % and the microstructure remained homogeneous and stable. Furthermore, the stress strain curves showed strong strain hardening which was not attributed exclusively to dynamic grain growth.

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References

[1] Superplasticity: 60 years after Pearson: Editor Norman Ridley. The Institute of Materials, London, 1995.

[2] H. Watanabe, T. Mukai, M. Mabuchi Y K. Higashi, Scripta mater. 41 (1999) 209-213.

[3] K. Kubota, M. Mabuchi Y K. Higashi, J. Mater. Sci. 34 (1999) 2255-2262. doi:10.1023/A:1004561205627

[4] T. Mukai, T.G. Nieh Y K. Higashi, Mater. Sci. Tech. 14 (1998) 32-35.

[5] M. Mabuchi, K. Ameyama, H. Iwasaki Y K. Higashi, Acta mater. 47 (1999) 2047-2057. doi:10.1016/S1359-6454(99)00094-4

[6] J.K. Solberg Y J. Tørklep, Ø. Bauger Y H. Gestland, Mater. Sci. Eng. A134 (1991) 1201-1203. doi:10.1016/0921-5093(91)90955-M

[7] W.J. Kim, S.W. Chung, C.S. Chung Y D. Kum, Acta mater. 49 (2001) 3337-3345. doi:10.1016/S1359-6454(01)00008-8

[8] H. Watanabe, T. Mukai, K. Ishikawa Y K. Higashi, Scripta mater. 46 (2002) 851-856.

[9] H. Tsutsui, H. Watanabe, T. Mukai, M. Kohzu, S. Tanabe y K. Higashi, Mater. Trans. JIM 40 (1999) 931-934.

[10] Y.N. Wang Y J.C. Huang, Scripta mater. 48 (2003) 1117-1122.

[11] V.M. Segal, Mater. Sci. Eng. A271 (1999) 322- 333. doi:10.1016/S0921-5093(99)00248-8

[12] Z. Horita, K. Matsubara, K. Makii Y T.G. LANGDON, Scripta mater. 47 (2002) 255-260.

[13] T. Mukai, H. Watanabe Y K. Higashi, Mater. Sci. Forum (2000) 15-170.

[14] Y. Iwahashi, M. Furukawa, Z. Horita, M. Nemoto Y T.G. Langdon, Metall. Mater. Trans. 29A (1998) 2245-2252.

[15] M. Eddahbi, Informe Anual, Conserjería de Educación de la Comunidad Autónoma de Madrid (CAM), 2003.

[16] P.A. González, C.L. Pérez, Y. Garcés Y J. Gilsevillano, Rev. Metal. Madrid 37 (2001) 673- 692.

[17] W.J. Kim, C.W. An, Y.S. Kim, S.H. Min Y S.I. Hong, Scripta mater. 47 (2002) 39-44.

[18] M. Eddahbi, J.A. Del Valle, M.T. Pérez-Prado Y O.A. Ruano, Mater. Sci. Eng. (2005) 308-311.

[19] Y. Yoshida, L. Cisar, S. Kamado Y Y. Kojima, Mater. Trans. 4 (2003) 468-475. doi:10.2320/matertrans.44.468

[20] W.J. Kim, S.I. Hong, Y.S. Kim, S.H. Min, H.T. Jeong Y J.D. Lee, Acta mater. 51 (2003) 3293- 3307. doi:10.1016/S1359-6454(03)00161-7

[21] J. Koike, T. Kobayashi, T. Mukai, H. Watanabe, M. Suzuki, K. Maruyama Y K. Higashi, Acta mater. 51 (2003) 2055-2065. doi:10.1016/S1359-6454(03)00005-3

[22] T. Mukai, M. Yamanoi, H. Watanabe Y K. Higashi, Scripta mater. 45 (2001) 89-94.

[23] H.T. Jeong, K.K. Um Y D.N. Lee: Analysis of Inhomogeneous Rolling Texture of FCC Metal Sheets: Editor J.A. Szpunar, Pro. De ICOTOM12, 1. Ottawa: NRC Research Press, 1999, p.26-7.

[24] N. Ridley, Mater. Sci. Technol. 6 (1990) 1145- 1156.

[25] H. Gudmundsson, D. Brooks Y J.A. Pert, Acta metall. mater. 39 (1991) 19-35.

[26] Y.N. Kwon, H.J. Koh, S. Lee, N.J. Kim Y Y.W. Chang, Metall. Mater. Trans. 32A (2001) 1649- 1658.

[27] T. Sakai, X. Yuyue Y H. Miura, Mater. Sci. Eng. A234 (1997) 857-860. doi:10.1016/S0921-5093(97)00398-5

[28] M. Eddahbi, T. Mcnelley Y O.A. Ruano, Metall. Mater. Trans. 32A (2001) 1093-1102.

[29] H. Watanabe, T. Mukai, M. Kohzu, S. Tanabe Y K. Higashi, Acta mater. 47 (1999) 3753- 3758. doi:10.1016/S1359-6454(99)00253-0

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Published

2006-04-30

How to Cite

Eddahbi, M., & Ruano, O. A. (2006). Superplastic behaviour of an AZ61 alloy processed by equal channel angular extrusion. Revista De Metalurgia, 42(2), 146–157. https://doi.org/10.3989/revmetalm.2006.v42.i2.15

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