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Microstructual evolution of AZ80 magnesium alloy during multi-directional compression deformation at elevated temperature

  • Hongge Yan , Jihua Chen , Qiang Guo , Bin Su and Yuanzhi Wu
Published/Copyright: June 11, 2013
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International Journal of Materials Research
From the journal International Journal of Materials Research Volume 102 Issue 2

Abstract

Microstructural evolution of AZ80 magnesium alloy during multi-directional compression deformation at elevated temperature was systematically investigated. The effects of deformation variables on the as-compressed microstructures and the deformation behavior were analyzed. Grain splitting that developed in various directions due to the formation of microbands was the main characteristic of microstructural evolution during hot multi-directional compression, which was different from that of the continuous uniaxial compression. Such microbands intersected each other, resulting in continuous subdivision of the coarse grains into misoriented fine domains, thus contributing to grain refinement. Further deformation led to increases in the number and misorientation of these boundaries and finally almost full development of fine equiaxed grains at high strain. A more homogeneous microstructure with fine dynamic recrystallization grains could be attained with the applied strain up to a critical strain, and after that, it was difficult to achieve further grain refinement. However, the higher reduction in each pass and the lower deformation temperature in the certain range aided grain refinement. The second phase Mg17Al12 with large particle size that remained after solution treatment experienced a series of changes with the process of breaking up, dissolving, precipitating and then re-dissolving. Fine precipitates were located at the grain boundaries, suppressing dislocation movement and preventing grain growth.

Keywords: Magnesium alloy; Multi-directional plastic deformation; Microstructure; Dynamic recrystallization; Grain refinement
* Correspondence address Dr Jihua Chen, School of Materials Science and Engineering, Hunan University, Changsha, P. R. China, Tel.: +86 731 8866 4005, Fax: +86 731 8882 1611, E-Mail:

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Received: 2010-2-1
Accepted: 2010-10-29
Published Online: 2013-06-11
Published in Print: 2011-02-01

© 2011, Carl Hanser Verlag, München

Articles in the same Issue

  1. Contents
  2. Contents
  3. Feature
  4. Re-evaluation of activities of magnesium and zinc components in the magnesium—zinc binary system from very low to high temperature
  5. Original Contributions
  6. Phase equilibria studies in alumina-containing high zinc fayalite slags with CaO/SiO2 = 0.55 Part 1
  7. Influence of oxygen partial pressure on the growth of Al-doped zinc oxide films by reactive MF magnetron sputtering
  8. Discussion on the computational algorithms of stress inside nano-scale solid material
  9. Phase behavior of Ni- and Co-doped SnO2 via reactive sintering and solution annealing
  10. Microstructural evolution of ferritic steel powder during mechanical alloying with iron oxide
  11. Texture and mechanical properties of strip cast and hot rolled magnesium AZ31
  12. Development of highly cube textured nickel superconductor substrate tapes by Accumulative Roll Bonding (ARB)
  13. Temperature dependence of rapidly thermally annealed Ba0.6Sr0.4TiO3 thin film fabricated on platinized Si substrate
  14. Template-free hydrothermal synthesis of tubular ZnO clusters and rods
  15. Preparation of electrospun titania nanofibers
  16. Banded structures in dual-phase steels – A novel characterization method
  17. Hot rolling of binary Ti–Nb alloys Part II: mechanical properties anisotropy
  18. Microstructual evolution of AZ80 magnesium alloy during multi-directional compression deformation at elevated temperature
  19. DGM News
  20. DGM News
https://doi.org/10.3139/146.110466
Keywords for this article
Magnesium alloy; Multi-directional plastic deformation; Microstructure; Dynamic recrystallization; Grain refinement

Articles in the same Issue

  1. Contents
  2. Contents
  3. Feature
  4. Re-evaluation of activities of magnesium and zinc components in the magnesium—zinc binary system from very low to high temperature
  5. Original Contributions
  6. Phase equilibria studies in alumina-containing high zinc fayalite slags with CaO/SiO2 = 0.55 Part 1
  7. Influence of oxygen partial pressure on the growth of Al-doped zinc oxide films by reactive MF magnetron sputtering
  8. Discussion on the computational algorithms of stress inside nano-scale solid material
  9. Phase behavior of Ni- and Co-doped SnO2 via reactive sintering and solution annealing
  10. Microstructural evolution of ferritic steel powder during mechanical alloying with iron oxide
  11. Texture and mechanical properties of strip cast and hot rolled magnesium AZ31
  12. Development of highly cube textured nickel superconductor substrate tapes by Accumulative Roll Bonding (ARB)
  13. Temperature dependence of rapidly thermally annealed Ba0.6Sr0.4TiO3 thin film fabricated on platinized Si substrate
  14. Template-free hydrothermal synthesis of tubular ZnO clusters and rods
  15. Preparation of electrospun titania nanofibers
  16. Banded structures in dual-phase steels – A novel characterization method
  17. Hot rolling of binary Ti–Nb alloys Part II: mechanical properties anisotropy
  18. Microstructual evolution of AZ80 magnesium alloy during multi-directional compression deformation at elevated temperature
  19. DGM News
  20. DGM News
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