Quasicrystal as a reinforcement material in magnesium alloys

Hye Jung Chang, Won Tae Kim, Do Hyang Kim

Research output: Contribution to journalReview article

1 Citation (Scopus)

Abstract

The existence of the two-phase region (icosahedral phase (I-phase) + α-Mg) in the Mg-rich corner of the Mg-Zn-Y system indicates that composites consisting of I-phase and ductile α-Mg can be fabricated by a simple solidification process. Alloys with a range of combined strength and ductility can be designed by changing the fraction of the I-phase. Strengthening in proportion with increasing the volume fraction of I-phase can be explained by the effect of dispersion hardening due to the presence of finely dispersed I-phase particles. When quasicrystals exist in the α-Mg matrix as a second phase in Mg-Zn-Y alloys, the quasicrystals are stable against coarsening during thermomechanical processes such as hot rolling and high-temperature forming, due to the low interfacial energy of the quasicrystals with the α-Mg crystalline matrix, which provides strong bonding properties at the I-phase/matrix interface. Therefore, quasicrystal-reinforced Mg-Zn-Y alloys exhibit a much better combination of mechanical properties and formability than commercially used alloys such as AZ31 and AZ 61.

Original languageEnglish
Pages (from-to)1176-1184
Number of pages9
JournalIsrael Journal of Chemistry
Volume51
Issue number11-12
DOIs
Publication statusPublished - 2011 Dec 1

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Quasicrystals
Magnesium alloys
Reinforcement
Dispersion hardening
Hot rolling
Coarsening
Formability
Interfacial energy
Ductility
Solidification
Volume fraction
Crystalline materials
Mechanical properties
Composite materials
Temperature

All Science Journal Classification (ASJC) codes

  • Chemistry(all)

Cite this

Chang, Hye Jung ; Kim, Won Tae ; Kim, Do Hyang. / Quasicrystal as a reinforcement material in magnesium alloys. In: Israel Journal of Chemistry. 2011 ; Vol. 51, No. 11-12. pp. 1176-1184.
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Quasicrystal as a reinforcement material in magnesium alloys. / Chang, Hye Jung; Kim, Won Tae; Kim, Do Hyang.

In: Israel Journal of Chemistry, Vol. 51, No. 11-12, 01.12.2011, p. 1176-1184.

Research output: Contribution to journalReview article

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AU - Chang, Hye Jung

AU - Kim, Won Tae

AU - Kim, Do Hyang

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N2 - The existence of the two-phase region (icosahedral phase (I-phase) + α-Mg) in the Mg-rich corner of the Mg-Zn-Y system indicates that composites consisting of I-phase and ductile α-Mg can be fabricated by a simple solidification process. Alloys with a range of combined strength and ductility can be designed by changing the fraction of the I-phase. Strengthening in proportion with increasing the volume fraction of I-phase can be explained by the effect of dispersion hardening due to the presence of finely dispersed I-phase particles. When quasicrystals exist in the α-Mg matrix as a second phase in Mg-Zn-Y alloys, the quasicrystals are stable against coarsening during thermomechanical processes such as hot rolling and high-temperature forming, due to the low interfacial energy of the quasicrystals with the α-Mg crystalline matrix, which provides strong bonding properties at the I-phase/matrix interface. Therefore, quasicrystal-reinforced Mg-Zn-Y alloys exhibit a much better combination of mechanical properties and formability than commercially used alloys such as AZ31 and AZ 61.

AB - The existence of the two-phase region (icosahedral phase (I-phase) + α-Mg) in the Mg-rich corner of the Mg-Zn-Y system indicates that composites consisting of I-phase and ductile α-Mg can be fabricated by a simple solidification process. Alloys with a range of combined strength and ductility can be designed by changing the fraction of the I-phase. Strengthening in proportion with increasing the volume fraction of I-phase can be explained by the effect of dispersion hardening due to the presence of finely dispersed I-phase particles. When quasicrystals exist in the α-Mg matrix as a second phase in Mg-Zn-Y alloys, the quasicrystals are stable against coarsening during thermomechanical processes such as hot rolling and high-temperature forming, due to the low interfacial energy of the quasicrystals with the α-Mg crystalline matrix, which provides strong bonding properties at the I-phase/matrix interface. Therefore, quasicrystal-reinforced Mg-Zn-Y alloys exhibit a much better combination of mechanical properties and formability than commercially used alloys such as AZ31 and AZ 61.

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