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Intermetallic particle

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Particles formed within metal alloys

Intermetallic particles form during solidification of metallic alloys.

Aluminium alloys

Al-Si-Cu-Mg alloys

Al-Si-Cu-Mg alloys form Al5FeSi- plate like intermetallic phases like -Al8Fe2Si, Al2Cu, etc. The size and morphology of these intermetallic phases in these alloys control the mechanical properties of these alloys, especially strength and ductility. The size of these phases depends on the secondary dendrite arm spacing, as well as the Si content of the alloy, of the primary phase in the micro structure.

Phases and crystal structures

Phase Structure Space Group a b c α β γ ..
α-Al8Fe2Si hexagonal p63/mmc(194) 12.404 12.404 26.234 90 90 120 ..
β-Al5FeSi monoclinic 2/m 6.16760 6.1661 20.8093 .. .. 91 ..
Al2Cu .. .. .. .. .. .. .. .. ..

Magnesium alloys

WE 43

In-situ synchrotron diffraction experiment on Electron alloy-WE 43 (Mg4Y3Nd) shows that this alloy form the following intermetallic phases ;Mg12Nd, Mg14Y4Nd, and Mg24Y5.

Phases and crystal structures

Phase Structure Space Group a b c α β γ ..
Mg41Nd5 .. .. .. .. .. .. .. .. ..
β-Mg14Nd2Y face centered cubic 2.2 nm .. .. ..
Mg24Y5 body centered cubic .. 1.12 nm .. .. .. .. .. ..

AZ 91

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References

  1. Caceres, C. H. Svensson, I. L. Taylor, J. A. (2003). "Strength-ductility behaviour of Al-Si-Cu-Mg casting alloys in T6 temper". International Journal of Cast Metals Research. 15 (5): 531–543. doi:10.1080/13640461.2003.11819539.{{cite journal}}: CS1 maint: multiple names: authors list (link)
  2. Sivarupan, Tharmalingam; Caceres, Carlos H.; Taylor, John A. (9 May 2013). "Alloy Composition and Dendrite Arm Spacing in Al-Si-Cu-Mg-Fe Alloys". Metallurgical and Materials Transactions A. 44 (9): 4071–4080. Bibcode:2013MMTA...44.4071S. doi:10.1007/s11661-013-1768-x. S2CID 135926219.
  3. Sivarupan, Tharmalingam; Caceres, Carlos H.; Taylor, John A. (July 2013). "Effect of Si Content on the Size of Fe-Rich Intermetallic Particles in Al-xSi-0.8Fe Alloys". Materials Science Forum. 765: 107–111. CiteSeerX 10.1.1.1001.8916. doi:10.4028/www.scientific.net/MSF.765.107. S2CID 136622162.
  4. Sivarupan, T.; Taylor, J. A.; Cáceres, C. H. (2014). "Effect of Si and Cu Content on the Size of Intermetallic Phase Particles in Al-Si-Cu-Mg-Fe Alloys". Shape/Tiryakioǧlu. pp. 137–143. doi:10.1002/9781118888100.ch17. ISBN 9781118888100.
  5. Sivarupan, Tharmalingam (2014). Ductility and solidification issues in Al-Si-Cu-Mg alloys (PDF) (PhD thesis). School of Mechanical and Mining Engineering, The University of Queensland. doi:10.14264/uql.2015.91.
  6. Sivarupan, Tharmalingam; Taylor, John Andrew; Cáceres, Carlos Horacio (25 February 2015). "SDAS, Si and Cu Content, and the Size of Intermetallics in Al-Si-Cu-Mg-Fe Alloys". Metallurgical and Materials Transactions A. 46 (5): 2082–2107. Bibcode:2015MMTA...46.2082S. doi:10.1007/s11661-015-2808-5. S2CID 136803392.
  7. R.N. Corby and P.J. Black: Acta Crystallogr. Sect. B, 1977, vol. 33, pp. 3468–75.
  8. V. Hansen, B. Hauback, M. Sundberg, C. Romming, and J. Gjonnes: Acta Crystallogr. Sect. B, 1998, vol. 54, pp. 351–57.
  9. Tolnai, D.; Mendis, C.L.; Stark, A.; Szakács, G.; Wiese, B.; Kainer, K.U.; Hort, N. (July 2013). "In situ synchrotron diffraction of the solidification of Mg4Y3Nd" (PDF). Materials Letters. 102–103: 62–64. Bibcode:2013MatL..102...62T. doi:10.1016/j.matlet.2013.03.110.
  10. ^ "Archived copy" (PDF). Archived from the original (PDF) on 2014-07-15. Retrieved 2015-04-27.{{cite web}}: CS1 maint: archived copy as title (link)


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