Thermodynamics of Mg-Zn-Zr: Implication on the effect of Zr on grain refining of Mg-Zn alloys

Raymundo Arroyave, Zi Kui Liu

Research output: Contribution to journalConference article

4 Citations (Scopus)

Abstract

Due to their high specific strength, magnesium alloys have become increasingly attractive for automotive structural applications. It has previously been shown that Zr is a very effective grain refiner of Mg-Zn alloys. In this work, we present a thermodynamic model of the Mg-Zn-Zr system based on the CALPHAD method. Using this model, the influence of Zn additions on the grain size of Mg-Zr alloys is discussed based on the thermodynamic properties of the Mg-Zn-Zr ternary. Calculations of the liquidus surfaces and equilibrium solidification are performed and related to experimental observations. The possible formation of metastable intermetallic phases during solidification and heat treatment is also discussed. Solubility of Zr in Mg-Zn-Zr alloys as well as phase fractions of intermetallic compounds are systematically studied as these parameters greatly affect grain refining.

Original languageEnglish (US)
Pages (from-to)203-208
Number of pages6
JournalMagnesium Technology
StatePublished - Sep 27 2005
Event2005 TMS Annual Meeting - San Francisco, CA, United States
Duration: Feb 13 2005Feb 17 2005

Fingerprint

Refining
Thermodynamics
Intermetallics
Solidification
Magnesium alloys
Thermodynamic properties
Solubility
Heat treatment

All Science Journal Classification (ASJC) codes

  • Engineering(all)

Cite this

@article{481ce3aae55d4292afb30f3cf3ed713d,
title = "Thermodynamics of Mg-Zn-Zr: Implication on the effect of Zr on grain refining of Mg-Zn alloys",
abstract = "Due to their high specific strength, magnesium alloys have become increasingly attractive for automotive structural applications. It has previously been shown that Zr is a very effective grain refiner of Mg-Zn alloys. In this work, we present a thermodynamic model of the Mg-Zn-Zr system based on the CALPHAD method. Using this model, the influence of Zn additions on the grain size of Mg-Zr alloys is discussed based on the thermodynamic properties of the Mg-Zn-Zr ternary. Calculations of the liquidus surfaces and equilibrium solidification are performed and related to experimental observations. The possible formation of metastable intermetallic phases during solidification and heat treatment is also discussed. Solubility of Zr in Mg-Zn-Zr alloys as well as phase fractions of intermetallic compounds are systematically studied as these parameters greatly affect grain refining.",
author = "Raymundo Arroyave and Liu, {Zi Kui}",
year = "2005",
month = "9",
day = "27",
language = "English (US)",
pages = "203--208",
journal = "Magnesium Technology",
issn = "1545-4150",

}

Thermodynamics of Mg-Zn-Zr : Implication on the effect of Zr on grain refining of Mg-Zn alloys. / Arroyave, Raymundo; Liu, Zi Kui.

In: Magnesium Technology, 27.09.2005, p. 203-208.

Research output: Contribution to journalConference article

TY - JOUR

T1 - Thermodynamics of Mg-Zn-Zr

T2 - Implication on the effect of Zr on grain refining of Mg-Zn alloys

AU - Arroyave, Raymundo

AU - Liu, Zi Kui

PY - 2005/9/27

Y1 - 2005/9/27

N2 - Due to their high specific strength, magnesium alloys have become increasingly attractive for automotive structural applications. It has previously been shown that Zr is a very effective grain refiner of Mg-Zn alloys. In this work, we present a thermodynamic model of the Mg-Zn-Zr system based on the CALPHAD method. Using this model, the influence of Zn additions on the grain size of Mg-Zr alloys is discussed based on the thermodynamic properties of the Mg-Zn-Zr ternary. Calculations of the liquidus surfaces and equilibrium solidification are performed and related to experimental observations. The possible formation of metastable intermetallic phases during solidification and heat treatment is also discussed. Solubility of Zr in Mg-Zn-Zr alloys as well as phase fractions of intermetallic compounds are systematically studied as these parameters greatly affect grain refining.

AB - Due to their high specific strength, magnesium alloys have become increasingly attractive for automotive structural applications. It has previously been shown that Zr is a very effective grain refiner of Mg-Zn alloys. In this work, we present a thermodynamic model of the Mg-Zn-Zr system based on the CALPHAD method. Using this model, the influence of Zn additions on the grain size of Mg-Zr alloys is discussed based on the thermodynamic properties of the Mg-Zn-Zr ternary. Calculations of the liquidus surfaces and equilibrium solidification are performed and related to experimental observations. The possible formation of metastable intermetallic phases during solidification and heat treatment is also discussed. Solubility of Zr in Mg-Zn-Zr alloys as well as phase fractions of intermetallic compounds are systematically studied as these parameters greatly affect grain refining.

UR - http://www.scopus.com/inward/record.url?scp=24944589480&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=24944589480&partnerID=8YFLogxK

M3 - Conference article

AN - SCOPUS:24944589480

SP - 203

EP - 208

JO - Magnesium Technology

JF - Magnesium Technology

SN - 1545-4150

ER -