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The effect of cooling rate on the microstructure and mechanical properties of Mg–Zn–Gd-based alloys

  • Yong Liu , Guangyin Yuan , Jian Yin , Chen Lu , Wenjiang Ding and J. Z. Jiang
Published/Copyright: June 11, 2013
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International Journal of Materials Research
From the journal International Journal of Materials Research Volume 99 Issue 9

Abstract

The microstructure and mechanical properties of Mg3.5Zn0.6Gd and Mg3.5Zn0.6Gd1.5Cu alloys were investigated under different solidification conditions. The microstructure and phase constitutions of alloys were characterized using optical microscopy, scanning electron microscopy, X-ray diffraction and differential thermal analysis. The results indicate that the cooling rate plays an important role in grain refinement and phase constitutions of Mg – Zn – Gd alloys. In the cooling rate range from 4.8 K s− 1 to 18.5 K s− 1 for the Mg – Zn – Gd system, higher content of the icosahedral phase (I-phase) was obtained under the condition of higher cooling rate which accelerated the nucleation and growth of the I-phase. Under the cooling rate of 18.5 K s− 1, the mechanical properties of the Mg3.5Zn0.6Gd alloy were further improved by the high I-phase content due to its unique icosahedral structure, in addition to the contribution of grain refinement.

Keywords: Mg – Zn – Gd alloy; Quasicrystal; Laves phase; Mechanical properties; Cooling rate
* Correspondence address, Dr. Yong Liu International Center for New-Structured Materials (ICNSM) Zhejiang University and Laboratory of New-Structured Materials, Department of Materials Science and Engineering Zhejiang University, Hangzhou 310027, PR China 38 Zheda Road, Hangzhou Tel.: +86 571 87951528 E-mail:

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Received: 2007-10-2
Accepted: 2008-5-16
Published Online: 2013-06-11
Published in Print: 2008-09-01

© 2008, Carl Hanser Verlag, München

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https://doi.org/10.3139/146.101728
Keywords for this article
Mg – Zn – Gd alloy; Quasicrystal; Laves phase; Mechanical properties; Cooling rate

Articles in the same Issue

  1. Contents
  2. Contents
  3. Basic
  4. Critical temperature for massive transformation in ultra-low-carbon Fe–C alloys
  5. Are data correctly fitted by the sin2 ψ and similar methods?
  6. Liquidus surface projection of the Fe–Co–C ternary system in the iron-rich corner
  7. Prediction of thermodynamic activities in binary iron-based alloys using two-point Padé approximants
  8. Study of fatigue dislocation structures in [233] coplanar double-slip-oriented copper single crystals using SEM electronic channelling contrast
  9. Microstructures at high temperature of Fe-30 wt.% Cr-xC Alloys with x varying from 0 to 2 wt.%
  10. The effect of cooling rate on the microstructure and mechanical properties of Mg–Zn–Gd-based alloys
  11. The effect of thermal exposure on the microstructure and hardness of as-cast Mg–Zn–Al alloys with Sn addition
  12. Applied
  13. Deformation and fracture of Ti-base nanostructured composite
  14. Microstructure and some properties of FeCr25Co15 alloy subjected to plastic deformation by complex load
  15. Determination of the concentration dependent diffusion coefficient of nitrogen in expanded austenite
  16. Suitability of maraging steel weld cladding for repair of die casting tooling
  17. Catalytic performance of Fe-, Pd-, and Pd–Fe- mordenites in simulated hydrocarbon-selective catalytic reduction of N2O by methane in a model flue-gas from nitric acid plants
  18. Thermodynamic consideration and experimental study on the preparation of heat-treated hollow nickel fibres
  19. A model for the intrinsic kinetic parameters of the direct reduction of MoS2 with hydrogen
  20. Notification
  21. DGM News
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