The effect of casting variables on the structure of hypereutectic Al-Si alloys

M. Faraji, Judith Todd Copley, H. Jones

Research output: Chapter in Book/Report/Conference proceedingConference contribution

9 Citations (Scopus)

Abstract

The effect of size refinement of primary silicon and modification of eutectic silicon, separately and simultaneously, on microstructure of hypereutectic Al-20wt%Si has been investigated under different casting conditions. Results showed that number per unit volume of primary silicon particles was doubled by inoculation with 0.02% phosphorus in the alloy with 0.0015% phosphorus already in it, whereas 70% of a small ingot (40×35 mm) became modified eutectic, and the formation of primary silicon was suppressed, on adding 0.1% strontium. Simultaneous addition of phosphorus and strontium still refined the primary silicon but did not modify the eutectic. Addition of strontium alone caused roughening of the primary silicon, exemplified by increased undercooling registered on the cooling curve. Also crystallographic relationships between polyhedral primary silicon particles have been investigated by Electron Back Scattered Diffraction (EBSD).

Original languageEnglish (US)
Title of host publicationAluminium Alloys 2006
Subtitle of host publicationResearch Through Innovation and Technology - Proceedings of the 10th International Conference on Aluminium Alloys
Pages1741-1746
Number of pages6
EditionPART 2
StatePublished - Dec 1 2006
Event10th International Conference on Aluminium Alloys, (ICAA-10) - Vancouver, Canada
Duration: Jul 9 2006Jul 13 2006

Publication series

NameMaterials Science Forum
NumberPART 2
Volume519-521
ISSN (Print)0255-5476

Other

Other10th International Conference on Aluminium Alloys, (ICAA-10)
CountryCanada
CityVancouver
Period7/9/067/13/06

Fingerprint

Silicon
Casting
silicon
Strontium
strontium
eutectics
Phosphorus
Eutectics
phosphorus
Undercooling
ingots
supercooling
inoculation
Ingots
Diffraction
Cooling
cooling
microstructure
Microstructure
Electrons

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

Cite this

Faraji, M., Todd Copley, J., & Jones, H. (2006). The effect of casting variables on the structure of hypereutectic Al-Si alloys. In Aluminium Alloys 2006: Research Through Innovation and Technology - Proceedings of the 10th International Conference on Aluminium Alloys (PART 2 ed., pp. 1741-1746). (Materials Science Forum; Vol. 519-521, No. PART 2).
Faraji, M. ; Todd Copley, Judith ; Jones, H. / The effect of casting variables on the structure of hypereutectic Al-Si alloys. Aluminium Alloys 2006: Research Through Innovation and Technology - Proceedings of the 10th International Conference on Aluminium Alloys. PART 2. ed. 2006. pp. 1741-1746 (Materials Science Forum; PART 2).
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Faraji, M, Todd Copley, J & Jones, H 2006, The effect of casting variables on the structure of hypereutectic Al-Si alloys. in Aluminium Alloys 2006: Research Through Innovation and Technology - Proceedings of the 10th International Conference on Aluminium Alloys. PART 2 edn, Materials Science Forum, no. PART 2, vol. 519-521, pp. 1741-1746, 10th International Conference on Aluminium Alloys, (ICAA-10), Vancouver, Canada, 7/9/06.

The effect of casting variables on the structure of hypereutectic Al-Si alloys. / Faraji, M.; Todd Copley, Judith; Jones, H.

Aluminium Alloys 2006: Research Through Innovation and Technology - Proceedings of the 10th International Conference on Aluminium Alloys. PART 2. ed. 2006. p. 1741-1746 (Materials Science Forum; Vol. 519-521, No. PART 2).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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Faraji M, Todd Copley J, Jones H. The effect of casting variables on the structure of hypereutectic Al-Si alloys. In Aluminium Alloys 2006: Research Through Innovation and Technology - Proceedings of the 10th International Conference on Aluminium Alloys. PART 2 ed. 2006. p. 1741-1746. (Materials Science Forum; PART 2).