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Thermodynamic predictions of Mg – Al – Ca alloy compositions amenable to semi-solid forming

  • Songmao Liang , Rongshi Chen and Enhou Han
Published/Copyright: May 15, 2013
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International Journal of Materials Research
From the journal International Journal of Materials Research Volume 101 Issue 2

Abstract

Thermodynamic prediction based on a two-stage simulation has been carried out to investigate the composition range of Mg–Al–Ca alloys amenable to semi-solid forming. The results show that increasing the solute elements decreases the temperature sensitivity, but their effects on the solidification range are greatly different. In some Mg–Al–Ca alloys, the highest knee point in the liquid fraction vs. temperature curve is generated by the formation of Al2Ca phase. Several critical sections of the Mg–Al–Ca ternary system are also given. The criteria for semi-solid formability are identified and a range of compositions for Mg–Al–Ca alloys are evaluated in relation to these criteria. By comparing with A356 alloy and AZ91 alloy, a typical Mg–Al–Ca alloy AC74, is predicted to exhibit good semi-solid formability comparable to A356 and much better than AZ91.

Keywords: Mg–Al–Ca magnesium alloy; Thermodynamic prediction; Alloy composition selection; Semi-solid forming
∗ Correspondence address, Prof. Rongshi Chen State Key Laboratory for Corrosion and Protection Institute of Metal Research, Chinese Academy of Sciences 62 Wencui Road, Shenyang, 110015, P. R. China Tel.: +0086 24 2392 6646 Fax: +0086 24 2389 4149 E-mail:

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Received: 2008-7-27
Accepted: 2009-4-15
Published Online: 2013-05-15
Published in Print: 2010-02-01

© 2010, Carl Hanser Verlag, München

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https://doi.org/10.3139/146.110270
Keywords for this article
Mg–Al–Ca magnesium alloy; Thermodynamic prediction; Alloy composition selection; Semi-solid forming

Articles in the same Issue

  1. Contents
  2. Contents
  3. Editorial
  4. Materials for Information Technology
  5. Feature
  6. Advanced high-k/metal gate stack progress and challenges – a materials and process integration perspective
  7. Spintronics in metallic superconductor/ferromagnet hybrid structures
  8. Graphene metrology and devices
  9. The role of defects in resistively switching chalcogenides
  10. Materials in optical data storage
  11. Scaling effects on microstructure and reliability for Cu interconnects
  12. Effects of e-beam curing on glass structureand mechanical properties of nanoporous organosilicate thin films
  13. Printing materials for electronic devices
  14. Basic
  15. Characterisation of lead – calcium alloys ageing in anisothermal conditions by calorimetric, resistance and hardness in-situ measurements
  16. Thermodynamic predictions of Mg – Al – Ca alloy compositions amenable to semi-solid forming
  17. Capillary equilibrium in a semi-solid Al – Cu slurry
  18. A comparative study of room-temperature creep in lead-free tin-based solder alloys
  19. Modeling creep in a thick composite cylinder subjected to internal and external pressures
  20. Applied
  21. The oxidation behaviour of the 9 % Cr steel P92in CO2- and H2O-rich gases relevant to oxyfuel environments
  22. Effect of thermal and mechanical treatments on the hot working response of Mg-3Sn-1Ca alloy
  23. Structure and mechanical properties of an AlCr6Fe2Ti1 alloy produced by rapid solidification powder metallurgy method
  24. Ni2O3-modified TiO2 – xNx as efficientvisible-light photocatalysts
  25. Dependence of optical, structural and electrical properties of ZnxCd1–xS thin films prepared by co-evaporation on the composition for x = 0 – 1
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