Design Magnesium Alloys: How Computational Thermodynamics Can Help

Research output: Chapter in Book/Report/Conference proceedingChapter

Abstract

Thermodynamics has often been viewed applicable to states near equilibrium only although irreversible thermodynamics was already developed in 1950s. The CALPHAD technique of computational thermodynamics developed since early 1970s has helped to change this view. This technique couples the phase diagram and thermochemical properties to explicitly characterize all phases in a system, including stable, metastable, and unstable phases over a wide range of temperature, pressure and composition. The modeling of Gibbs energy of individual phases enables the calculation of driving forces between any intermediate non-equilibrium states for simulating dynamic microstructure evolutions. As same as the most commercial alloys, magnesium alloys are multi-component in nature with many intermetallic phases. To develop robust alloys that are less sensitive to process variability, phase relations under both equilibrium and nonequilibrium conditions are extremely valuable for the design of alloy compositions and processing procedures. In this presentation, the CALPHAD technique will be discussed. Particular attention will be paid to the phase relations in the Mg- Al-Zn ternary alloys.

Original languageEnglish (US)
Title of host publicationEssential Readings in Magnesium Technology
PublisherWiley-Blackwell
Pages403-410
Number of pages8
Volume9781118858943
ISBN (Electronic)9781118859803
ISBN (Print)9781118858943
DOIs
StatePublished - Mar 3 2014

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Magnesium alloys
Thermodynamics
Ternary alloys
Gibbs free energy
Chemical analysis
Intermetallics
Phase diagrams
Microstructure
Processing
Temperature

All Science Journal Classification (ASJC) codes

  • Engineering(all)
  • Materials Science(all)
  • Chemistry(all)

Cite this

Liu, Z. K. (2014). Design Magnesium Alloys: How Computational Thermodynamics Can Help. In Essential Readings in Magnesium Technology (Vol. 9781118858943, pp. 403-410). Wiley-Blackwell. https://doi.org/10.1002/9781118859803.ch64
Liu, Zi Kui. / Design Magnesium Alloys : How Computational Thermodynamics Can Help. Essential Readings in Magnesium Technology. Vol. 9781118858943 Wiley-Blackwell, 2014. pp. 403-410
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Liu, ZK 2014, Design Magnesium Alloys: How Computational Thermodynamics Can Help. in Essential Readings in Magnesium Technology. vol. 9781118858943, Wiley-Blackwell, pp. 403-410. https://doi.org/10.1002/9781118859803.ch64

Design Magnesium Alloys : How Computational Thermodynamics Can Help. / Liu, Zi Kui.

Essential Readings in Magnesium Technology. Vol. 9781118858943 Wiley-Blackwell, 2014. p. 403-410.

Research output: Chapter in Book/Report/Conference proceedingChapter

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Liu ZK. Design Magnesium Alloys: How Computational Thermodynamics Can Help. In Essential Readings in Magnesium Technology. Vol. 9781118858943. Wiley-Blackwell. 2014. p. 403-410 https://doi.org/10.1002/9781118859803.ch64