Mechanical property and corrosion resistance of Mg-Zn-Y alloys containing icosahedral phase

Do Hyung Kim, Young Kyun Kim, Won Tae Kim, Do Hyang Kim

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

Mechanical and property corrosion resistance of Mg-Zn-Y alloys with an atomic ratio of Zn/Y of 6.8 are investigated using optical microscopy, scanning electron microscopy, transmission electron microscopy, uniaxial tensile test and corrosion test with immersion and dynamic Potentiometric tests. The alloys showed an in-situ composite microstructure consisting of α-Mg and icosahedral phase (I-phase) as a strengthening phase. As the volume fraction of the I-phase increases, the yield and tensile strengths of the alloys increase while maintaining large elongation (26-30%), indicating that I-phase is effective for strengthening and forms a stable interface with surrounding a-Mg matrix. The presence of I-phase having higher corrosion potential than α-Mg, decreased the corrosion rate of the cast alloy up to I-phase volume fraction of 3.7%. However further increase in the volume fraction of the I-phase deteriorates the corrosion resistance due to enhanced internal galvanic corrosion cell between α-Mg and I-phase.

Original languageEnglish
Pages (from-to)145-152
Number of pages8
JournalJournal of Korean Institute of Metals and Materials
Volume49
Issue number2
DOIs
Publication statusPublished - 2011 Feb 1

Fingerprint

Corrosion Resistance
Mechanical Properties
Corrosion resistance
Volume fraction
Mechanical properties
Corrosion
Volume Fraction
Strengthening
Corrosion rate
Optical microscopy
Yield stress
Elongation
Tensile strength
Transmission electron microscopy
Microstructure
Scanning electron microscopy
Tensile Test
Tensile Strength
Composite materials
Transmission Electron Microscopy

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Modelling and Simulation
  • Surfaces, Coatings and Films
  • Metals and Alloys

Cite this

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abstract = "Mechanical and property corrosion resistance of Mg-Zn-Y alloys with an atomic ratio of Zn/Y of 6.8 are investigated using optical microscopy, scanning electron microscopy, transmission electron microscopy, uniaxial tensile test and corrosion test with immersion and dynamic Potentiometric tests. The alloys showed an in-situ composite microstructure consisting of α-Mg and icosahedral phase (I-phase) as a strengthening phase. As the volume fraction of the I-phase increases, the yield and tensile strengths of the alloys increase while maintaining large elongation (26-30{\%}), indicating that I-phase is effective for strengthening and forms a stable interface with surrounding a-Mg matrix. The presence of I-phase having higher corrosion potential than α-Mg, decreased the corrosion rate of the cast alloy up to I-phase volume fraction of 3.7{\%}. However further increase in the volume fraction of the I-phase deteriorates the corrosion resistance due to enhanced internal galvanic corrosion cell between α-Mg and I-phase.",
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Mechanical property and corrosion resistance of Mg-Zn-Y alloys containing icosahedral phase. / Kim, Do Hyung; Kim, Young Kyun; Kim, Won Tae; Kim, Do Hyang.

In: Journal of Korean Institute of Metals and Materials, Vol. 49, No. 2, 01.02.2011, p. 145-152.

Research output: Contribution to journalArticle

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