Skip to main content
SpringerLink
Log in

Precipitation kinetics in Al-Si-Mg/TiB2 in-situ composites

  • Published:
Transactions of the Indian Institute of Metals Aims and scope Submit manuscript

Abstract

Al-7Si-0.3Mg-TiB2 in-situ composites were made by the salt-metal reaction i.e., the reaction of K2TiF6 and KBF4 salts with the molten alloy. The kinetics of the formation of intermediate metastable precipitates in the process of Mg2Si formation in Al-7Si-0.3Mg-TiB2 in-situ composites with three different amounts of TiB2 particles (2.5, 5 and 10 wt.%) were studied using differential scanning calorimeter (DSC) and also compared with the Al-7Si-0.3Mg base alloy. Kissinger analysis of non-isothermal DSC scans at various heating rates was carried out to evaluate the activation energies associated with the precipitation processes. The metastable precipitates were characterized by taking the solutionized samples to their respective DSC peak temperatures at a particular heating rate and the samples were then observed under a transmission electron microscopy. It was found that there is a decrease in the activation energies of the GP zones with increase in TiB2 content.

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

Access this article

Log in via an institution

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. Murayama M and Hono K, Acta Mater., 47 (1999) 1537.

    Article  CAS  Google Scholar 

  2. Andersen S J, Zandbergen H W, Jansen J, Tráholt C, Tundal U and Reiso O, Acta Mater., 46 (1998) 3283.

    Article  CAS  Google Scholar 

  3. Lynch J P, Brown L M and Jacobs M H, Acta. Metall., 30 (1982) 1389.

    Article  CAS  Google Scholar 

  4. Rack H J and Krenzer R W, Metall. Trans., 8A (1977) 335.

    CAS  Google Scholar 

  5. Papazian J M, Metall. Trans., 19A (1988) 2945.

    CAS  Google Scholar 

  6. Chen S P, Mussert K M and Van der Zwaag S, J. Mater. Sci., 33 (1998) 4477.

    Article  CAS  Google Scholar 

  7. Mandal A, Maiti R, Chakraborty M and Murty B S, Mater. Sci. Eng., 386 (2004) 296

    Google Scholar 

  8. Wood J V, Davies P and Kellie J L F, Mater. Sci. Tech., 9 (1993) 833.

    CAS  Google Scholar 

  9. Mandal A, Chakraborty M and Murty B S, Mater. Sci. Eng., A 489 (2008) 220.

    Article  Google Scholar 

  10. Dutta I and Allen S M, J. Mater. Sci. Lett., 10 (1991) 323.

    Article  CAS  Google Scholar 

  11. Dutta I, Allen S M and Hafley J L, Metall. Trans A, 22A (1991) 2553.

    CAS  Google Scholar 

Download references

Author information

Authors and Affiliations

  1. Department of Metallurgical and Materials Engineering, Indian Institute of Technology Madras, Chennai, 600036, Tamil Nadu, India

    Sree Harsha Nandam, S. Sankaran & B. S. Murty

Authors
  1. Sree Harsha Nandam
    View author publications

    You can also search for this author in PubMed Google Scholar

  2. S. Sankaran
    View author publications

    You can also search for this author in PubMed Google Scholar

  3. B. S. Murty
    View author publications

    You can also search for this author in PubMed Google Scholar

Corresponding author

Correspondence to Sree Harsha Nandam.

Rights and permissions

Reprints and permissions

About this article

Cite this article

Nandam, S.H., Sankaran, S. & Murty, B.S. Precipitation kinetics in Al-Si-Mg/TiB2 in-situ composites. Trans Indian Inst Met 64, 123 (2011). https://doi.org/10.1007/s12666-011-0024-6

Download citation

  • Received:

  • Revised:

  • Accepted:

  • Published:

  • DOI: https://doi.org/10.1007/s12666-011-0024-6

Keywords

Search

Navigation