The role of crystallography and thermodynamics on phase selection in binary magnesium–rare earth (Ce or Nd) alloys

Easton, Mark; Gibson, Mark; Qiu, Dong; Zhu, Su-Ming; Gröbner, Joachim; Schmid–Fetzer, Rainer; Nie, Jian Feng; Zhang, Mingxing

doi:10.1016/j.actamat.2012.04.039

Cited by 71 publications

(27 citation statements)

References 58 publications

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“…That has been successfully applied in many cases, for example to understand the different phase selection in ascast and heat treated states of Mg-Ce and Mg-Nd alloys, in relation to the nucleation barriers of the second phase formation. [23] This approach is very powerful in multicomponent systems and was, for example, extended to understand as-cast and heat treated microstructures of ternary MgCe-Nd alloys. [24] …”

Section: Stable and Metastable Phase Diagramsmentioning

confidence: 99%

Phase Diagrams: The Beginning of Wisdom

Schmid–Fetzer

2014

J. Phase Equilib. Diffus.

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This work presents a primer on ''How to Read and Apply Phase Diagrams'' in the current environment of powerful thermodynamic software packages. Advanced aspects in that context are also covered. It is a brief guide into using this cornerstone of knowledge in materials science and engineering and offers assistance in the proper interpretation of results obtained from stateof-the-art Calphad-type thermodynamic calculations. Starting from the very basics it explains the reading of unary, binary and ternary phase diagrams, including liquidus projections, isothermal and vertical phase diagram sections. Application examples are directly derived from these phase diagrams of Fe, Cu-Ni, Mg-Al, and Mg-Al-Zn. The use of stable and metastable phase diagrams and appropriate choices of state variables are explained for the relevant Fe-C and Fe-C-Si systems. The most useful concept of zero-phase fraction lines in phase diagram sections of multicomponent systems is made clear by coming back to the Cu-Ni and Mg-Al-Zn systems. Thermodynamic solidification simulation using the Scheil approximation in comparison to the equilibrium case is covered in context of multicomponent multiphase solidification and exemplified for Mg-Al-Zn alloys. The generic approach is directly applicable for all inorganic materials, but exemplified in this concise work for a small selection of metallic systems to highlight the interdependences among the phase diagrams. The embedded application examples for real material systems and various materials processes also emphasize the use of phase diagrams for the path from initial off-equilibrium state towards equilibrium.

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Section: Stable and Metastable Phase Diagramsmentioning

confidence: 99%

Phase Diagrams: The Beginning of Wisdom

Schmid–Fetzer

2014

J. Phase Equilib. Diffus.

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“…The thermodynamic parameters of the binary system MgeNd are based on a comprehensive reassessment, using recent experimental data [18,29].…”

Section: Thermodynamic Calculation Of Mgelaece and Mgelaend Phase Diamentioning

confidence: 99%

Phase analysis of Mg–La–Nd and Mg–La–Ce alloys

et al. 2012

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“…That was demonstrated for binary magnesium -rare earth (Ce or Nd) alloys [22]. As a concluding remark it is emphasized that for truly multicomponent material systems the successful tools for predictive simulation of phase formation should all be based on reliable thermodynamic descriptions.…”

Section: Discussionmentioning

confidence: 99%

PHASE DIAGRAMS AND THEIR APPLICATIONS TO Mg ALLOYS

Schmid–Fetzer¹

2016

TMM

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This work summarizes the basics of phase diagrams and their relation to the Calphad method. It is emphasized that the benefits of quantitative prediction of phase formation of selected multicomponent alloys under equilibrium and special off-equilibrium processing conditions require the development of reliable and consistent thermodynamic descriptions forming a Calphad-type thermodynamic database. The implications of intermetallic phases in multicomponent Mg alloys are explained for ternary Mg-Ce-La/Nd alloys. An introduction to applications of this approach to phase formation in as-cast and heat treated Mg alloys is given and discussed in detail for the example of ternary Mg-Al-Zn alloys. The extension to truly multicomponent alloy systems and advanced kinetic calculations is briefly depicted.

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The role of crystallography and thermodynamics on phase selection in binary magnesium–rare earth (Ce or Nd) alloys

Cited by 71 publications

References 58 publications

Phase Diagrams: The Beginning of Wisdom

Phase Diagrams: The Beginning of Wisdom

Phase analysis of Mg–La–Nd and Mg–La–Ce alloys

PHASE DIAGRAMS AND THEIR APPLICATIONS TO Mg ALLOYS

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