Characterisation of AlFeSi Intermetallics in 6000 Series Aluminium Alloy Extrusions

Malcolm J. Couper; Barbara Rinderer; Ji Yong Yao

doi:10.4028/www.scientific.net/MSF.519-521.303

Paper Titles

A Multi-Mechanistic Model for Precipitation Strengthening in Al-Cu-Mg Alloys during Non-Isothermal Heat Treatments
p.277

Secondary Precipitation in Aluminium Alloys & Its Role in Modern Heat Treatment
p.283

Cluster Dynamics Modelling of the Precipitation Kinetics in Al(ZrSc) Alloys
p.291

Modelling the Phase Transformation from Al₆(Mn,Fe) to α-Al(Mn,Fe)Si Phase during Homogenization of AA3xxx Alloys
p.297

Characterisation of AlFeSi Intermetallics in 6000 Series Aluminium Alloy Extrusions
p.303

Vacancy-Solute Aggregates in Al-Zn-Mg-(Cu, Ag)
p.309

Key Microstructural Features Responsible for Improved Stress Corrosion Cracking Resistance and Weldability in 7xxx Series Al Alloys Containing Micro / Trace Alloying Additions
p.315

Development of a New 7xxx Ageing Model
p.321

Grain Boundary Precipitate Modification for Improved Intergranular Corrosion Resistance
p.327

HomeMaterials Science ForumMaterials Science Forum Vols. 519-521Characterisation of AlFeSi Intermetallics in 6000...

Characterisation of AlFeSi Intermetallics in 6000 Series Aluminium Alloy Extrusions

Abstract:

Alloys designed to optimise strength and extrudability have a lower alloy Mg to Si ratio than has commonly been used in AA6060 and AA6063 alloys. Intermetallic phases have an impact on alloy design since they tie up some of the Mg and Si alloy content. The effect of Mg and Si alloy content on the type of intermetallic phases present has been investigated using TEM, SEM and Thermocalc analysis. Results for Al-Mg-Si-Fe alloys with 0.46 - 0.70 wt%Mg, 0.27 - 1.24 wt%Si and 0.09 - 0.22 wt%Fe are presented. The occurrence of a-AlFeSi (various stoichiometries), b- Al5FeSi, p-Al8FeSi6Mg3, Mg2Si and Si has been found to depend on alloy composition within the ranges examined.

You might also be interested in these eBooks

View Preview

Info:

Periodical:

Materials Science Forum (Volumes 519-521)

Pages:

303-308

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.519-521.303

Citation:

Cite this paper

Online since:

July 2006

Authors:

Malcolm J. Couper, Barbara Rinderer, Ji Yong Yao

Keywords:

Alloy Development, Mg₂Si, Precipitation, ThermoCalc

Export:

RIS, BibTeX

Price:

Permissions CCC:

Request Permissions

Permissions PLS:

Request Permissions

Сopyright:

Citation:

References

[1] M.J. Couper, M.A. Cooksey, B. Rinderer, 7th Australian Asian Pacific Conference on Aluminium Casthouse Technology, Hobart, (2001).

Google Scholar

[2] M.J. Couper, M.A. Cooksey, N. Danilova, J.Y. Yao, E T2000, Chicago, May (2000).

Google Scholar

[3] G.A. Edwards, K. Stiller, G.L. Dunlop, M.J. Couper, Acta Met, 46, 3893-3904, (1998).

Google Scholar

[4] M. J. Couper, B. Rinderer, M. Cooksey, ICAA9, Goldcoast, Qld., Australia, (2004).

Google Scholar

[5] Australian provisional patent application, 4th July 1996; US Patent 6, 364, 969 Apr 2, (2002).

Google Scholar

[6] M. Qian, D.H. St. John, S. Maloney, M.J. Couper, 8th International Conference on Aluminium Alloys, ICAA8, Cambridge, July 2002. Appendix A : Intermetallic phase type, stoichiometry and compositions in at% and wt% Atomic % Weight % Phase Form Al Fe Si Mg Fe: Si Al Fe Si Mg Fe: Si Al7Fe3Si 63. 6 27. 3 9. 1 - 3 49. 1 43. 6 7. 3 - 6. 0 α-AlFeSi Al12Fe3Si 74. 9 18. 8 6. 3 - 3 62. 4 32. 2 5. 4 - 6. 0 Al8Fe2Si 66. 7 22. 2 11. 1 - 2 60. 7 31. 4 7. 9 - 4. 0 Al15Fe3Si2 75. 0 15. 0 10. 0 - 1. 5 64. 5 26. 6 8. 9 - 3. 0 β-AlFeSi Al5FeSi 71. 4 14. 3 14. 3 - 1. 0 61. 7 25. 5 12. 8 - 2. 0 π-AlFeSiMg Al8FeSi6Mg3 44. 4 5. 6 33. 3 16. 7 0. 2 42. 1 10. 9 32. 8 14. 2 0. 3 Mg-Si Mg2Si - - 33. 3 66. 7 - - - 36. 6 63. 4.

DOI: 10.4028/www.scientific.net/msf.396-402.107

Google Scholar