Skip to main content
Log in

Effect of Silicon Concentration on the Dendrite Coherency Point in Al–Si Binary Alloys

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

Abstract

Dendrite coherency is important to the formation of the solidification structure. The coherency point is a temperature at which the microstructure starts to bridge and develop some mechanical resistance. It is still too early in the solidification process for hot tearing to develop. Dendrite coherency point (DCP) characteristics in Al–Si binary alloys have been studied by double thermocouples method during solidification process. The results indicate that the DCP and solid fraction at DCP are decreased with an increase in silicon concentration. As for the unrefined Al–xSi (x = 1, 3, 5, 7 and 9 wt%) system alloys, the solid fraction at DCP varies from 0.14 to 0.38 and the corresponding dendrite coherency temperature varies from 598.6 to 653.8 °C. In addition, there is an approximate nonlinear relationship between DCP and silicon concentration. For the binary Al–Si hypoeutectic alloys, the change of DCP is not obvious by the grain refinement and modification treatment for the melt.

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

Fig. 1
Fig. 2
Fig. 3
Fig. 4

Similar content being viewed by others

References

  1. Chen Y-F, Jong S-H, and Hwang W-S, Mater Sci Technol 12 (1996) 540.

    CAS  Google Scholar 

  2. Monroe C, and Beckermann C, Mater Sci Eng A 413 (2005) 30.

  3. Easton M H W, Grandfield J, and St John D, Sweet E, Mater Forum 28 (2004) 228.

    Google Scholar 

  4. Paradies C J R N S, and Glicksman M E, Metall Mater Trans A 28A (1997) 875.

    Google Scholar 

  5. Zavaliangos A, Int J Mech Sci 40 (1998) 1035.

    Article  Google Scholar 

  6. Nabawy A M, Samuel A M, Samuel F H, and Doty H W, J Mater Sci 47 (2012) 4146.

    Article  CAS  Google Scholar 

  7. Hatami N, Babaei R, Dadashzadeh M, and Davami P, J Mater Process Technol 205 (2008) 506.

    Article  CAS  Google Scholar 

  8. Eskin D G, Suyitno, and Katgerman L, Prog Mater Sci 49 (2004) 629.

    Article  CAS  Google Scholar 

  9. Mitchell J B, Cockcroft S L, Viano D, Davidson C, and StJohn D, Metall Mater Trans A 38 (2007) 2503.

    Article  Google Scholar 

  10. Djurdjevic M B, Sokolowski J H, and Odanovic Z, J Therm Anal Calorim 109 (2012) 875.

    Article  CAS  Google Scholar 

  11. Malekan M, and Shabestari S G, Metall Mater Trans A 40 (2009) 3196.

    Article  Google Scholar 

  12. Chávez-Zamarripa R, Ramos-Salas J A, Talamantes-Silva J, Valtierra S, and Colás R, Metall Mater Trans A 38 (2007) 1878.

    Article  Google Scholar 

  13. Hou D H, Liang S M, Chen R S, Han E H, and Dong C, Mater Sci Forum 686 (2011) 371.

    Article  CAS  Google Scholar 

  14. Chai G, Backerud L, Arnberg T, and Ra L, Metall Mater Trans A 26A (1995) 965.

    Article  CAS  Google Scholar 

  15. Veldman N L M, Dahle A K, and St John D H L A, Metall Mater Trans A 32A (2001) 149.

    Google Scholar 

  16. Jian-feng L, Hong-chao K, An-jia W, Jin-shan L, Rui H, and Heng-zhi F, Trans Nonferrous Met Soc China 16 (2006) s1534.

    Google Scholar 

  17. Backerud S L, and Sigworth G K, Am Foundry Soc Trans 64 (1989) 459.

    Google Scholar 

Download references

Acknowledgments

This study is financially supported by National Science and Technology Major Project of “High-end CNC Machine Tools and Basic Manufacturing Equipment” (No. 2011ZX04001-031); National Natural Science Foundation of China (No. 50971083) and Promotive Research Fund for Young and Middle-aged Scientists of Shandong Province, China (No. BS2009ZZ005).

Author information

Authors and Affiliations

Authors

Corresponding author

Correspondence to Xuelei Tian.

Rights and permissions

Reprints and permissions

About this article

Cite this article

Xu, R., Zheng, H., Guo, F. et al. Effect of Silicon Concentration on the Dendrite Coherency Point in Al–Si Binary Alloys. Trans Indian Inst Met 67, 95–100 (2014). https://doi.org/10.1007/s12666-013-0320-4

Download citation

  • Received:

  • Accepted:

  • Published:

  • Issue Date:

  • DOI: https://doi.org/10.1007/s12666-013-0320-4

Keywords

Navigation