Microstructure and deformation behavior of a Mg-RE-Zn-Al alloy reinforced with the network of a Mg-RE phase

Beom Soo Shin, Jin Wook Kwon, DongHyun Bae

Research output: Contribution to journalArticle

22 Citations (Scopus)

Abstract

A new Mg-RE-Zn-Al alloy reinforced with the second phase of Mg12 (RE) has been developed to enhance mechanical properties at the elevated temperatures. When the alloy solidifies with a relatively high cooling rate under the pressure applied, an extremely fine α-Mg phase with a completely closed network of the second phase of Mg12 (RE) is developed. The reinforcing network restricts grain boundary sliding during deformation, resulting in a high yield strength of 150 MPa at 150 °C. Furthermore, the refined alloy exhibits around 27 % elongation to failure at 150 °C. This indicates that the failure behavior cannot be affected by the effects of residual stresses induced during solidification and stress concentrations developed near the second phase during deformation.

Original languageEnglish
Pages (from-to)203-207
Number of pages5
JournalMetals and Materials International
Volume15
Issue number2
DOIs
Publication statusPublished - 2009 Apr 1

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microstructure
Microstructure
Grain boundary sliding
stress concentration
yield strength
solidification
elongation
residual stress
Yield stress
Solidification
sliding
Stress concentration
Elongation
Residual stresses
grain boundaries
mechanical properties
Cooling
cooling
Mechanical properties
Temperature

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Metals and Alloys
  • Mechanics of Materials
  • Materials Chemistry

Cite this

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abstract = "A new Mg-RE-Zn-Al alloy reinforced with the second phase of Mg12 (RE) has been developed to enhance mechanical properties at the elevated temperatures. When the alloy solidifies with a relatively high cooling rate under the pressure applied, an extremely fine α-Mg phase with a completely closed network of the second phase of Mg12 (RE) is developed. The reinforcing network restricts grain boundary sliding during deformation, resulting in a high yield strength of 150 MPa at 150 °C. Furthermore, the refined alloy exhibits around 27 {\%} elongation to failure at 150 °C. This indicates that the failure behavior cannot be affected by the effects of residual stresses induced during solidification and stress concentrations developed near the second phase during deformation.",
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Microstructure and deformation behavior of a Mg-RE-Zn-Al alloy reinforced with the network of a Mg-RE phase. / Shin, Beom Soo; Kwon, Jin Wook; Bae, DongHyun.

In: Metals and Materials International, Vol. 15, No. 2, 01.04.2009, p. 203-207.

Research output: Contribution to journalArticle

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