Skip to main content
Log in

Microstructures and tensile properties of an A1-12 wt pct Si alloy produced by reciprocating extrusion

  • Published:
Metallurgical and Materials Transactions A Aims and scope Submit manuscript

Abstract

A reciprocating extrusion (RE) process has been developed for producing A1-12 wt pct Si bulk alloys with fine and uniform microstructures and superior properties. Two starting forms were used: disks produced by the hammer-and-anvil method and cast billets produced by casting. Variations of micro-structure and mechanical properties with the number of extrusion passes are investigated for these two starting forms. The results show that the porosity along the interfaces between the rapidly solidified layers could be completely eliminated to give a sound matrix. The Si-phase particles in both cases could be refined and distributed uniformly. The strength and ductility of all specimens are also enhanced, until the microstructure reaches an optimum state, as the number of extrusion passes increases. The tensile properties of the rapidly solidified Al-Si alloys are found to be superior to those of ingot-processed alloys, due to the inherent finer particles produced by rapid solidification. The mechanism for the improvement of the microstructures and properties is also discussed.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Institutional subscriptions

Similar content being viewed by others

References

  1. G.S. Cole, G.F. Bolling, and K.W. Casey: in Ultrafine-Grain Metals, J.J. Burke and V. Weiss, eds., Syracuse University Press, New York, NY, 1970, pp. 31–69.

    Google Scholar 

  2. G.T. Hahn and A.R. Rossenfield: Metall. Trans. A, 1975, vol. 6A, pp. 653–68.

    CAS  Google Scholar 

  3. R.H. van Stone and J.A. Psioda: Metall. Trans. A, 1975, vol. 6A, pp. 668–70.

    Google Scholar 

  4. E.A. Starke, Jr.: Mater. Sci. Eng., 1977, vol. 29 (2), pp. 99–115.

    Article  CAS  Google Scholar 

  5. J.R. Picken: J. Mater. Sci., 1981, vol. 16, pp. 1437–57.

    Article  Google Scholar 

  6. W.E. Quist and R.E. Lewis: Rapidly Solidified Powder Aluminum Alloys, ASTM, Philadelphia, PA, 1984, pp. 7–30.

    Google Scholar 

  7. E.J. Lavernia and N.J. Grant: Mater. Sci. Eng., 1988, vol. 98 (1–2), pp. 381–94.

    CAS  Google Scholar 

  8. S. Annavarpu, D. Apelian, and A. Lawley: Metall. Trans. A, 1988, vol. 19A, pp. 3077–86.

    Google Scholar 

  9. R.L. Bickerdike, D. Clarkand, J.N. Eastabrook, G. Huges, W.N. Mair, P.G. Partridge, and B.W. Viney: Rapidly Solidified Materials, Proc. Int. Conf., ASM, Metals Park, OH, 1985, pp. 145–52.

    Google Scholar 

  10. M. Moss, D.L. Smith, and R.A. Lefever: Appl. Phys. Lett., 1964, vol. 5, pp. 120–21.

    Article  CAS  Google Scholar 

  11. J.W. Yeh and C.H. Tsau: Metall. Trans. A, 1992, vol. 23A, pp. 2313–21.

    CAS  Google Scholar 

  12. J.W. Yeh and C.H. Tsau: Mater. Sci. Eng., 1993, vol. A165 (2), pp. 157–65.

    CAS  Google Scholar 

  13. J.W. Yeh and W.P. Liu: Metall. Mater. Trans. A, 1996, vol 27A, pp. 3558–68.

    Article  CAS  Google Scholar 

Download references

Author information

Authors and Affiliations

Authors

Rights and permissions

Reprints and permissions

About this article

Cite this article

Yeh, JW., Yuan, SY. & Peng, CH. Microstructures and tensile properties of an A1-12 wt pct Si alloy produced by reciprocating extrusion. Metall Mater Trans A 30, 2503–2512 (1999). https://doi.org/10.1007/s11661-999-0259-6

Download citation

  • Received:

  • Issue Date:

  • DOI: https://doi.org/10.1007/s11661-999-0259-6

Keywords

Navigation