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Time evolution of agglomerate size of semisolid magnesium alloy AZ91D during a real isothermal shearing

  • Liang Li and Mian Zheng
Published/Copyright: July 31, 2017
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International Journal of Materials Research
From the journal International Journal of Materials Research Volume 108 Issue 8

Abstract

The present study attempts to discuss the time evolution of the slurry microstructure of semisolid magnesium alloy AZ91D so as to control the forming process more effectively. We calculated the instantaneous shear stress and the time evolution of average agglomerate size of a real isothermal shearing process containing increasing shear rate, holding the maximal shear rate and decreasing shear rate. The calculated results demonstrate that we should adopt as great a maximal shear rate as possible to achieve a finer slurry microstructure and reduce the resulting larger startup shear stress by increasing the time interval required to increase the shear rate to maximum. Moreover, we also should shorten the time interval required to decrease the shear rate to zero as far as possible, so as to weaken agglomeration during decreasing shear rate and achieve a better final slurry microstructure.

Keywords: Semisolid processing; Microstructure; Alloys; Magnesium; AZ91D
*Correspondence address, Mr. Liang Li, College of Science, Liaoning University of Technology, Shiying street, Jinzhou 121001, P.R. China, Tel.: +86-0416-4198736, E-mail:

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Received: 2017-01-17
Accepted: 2017-05-18
Published Online: 2017-07-31
Published in Print: 2017-08-11

© 2017, Carl Hanser Verlag, München

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https://doi.org/10.3139/146.111527
Keywords for this article
Semisolid processing; Microstructure; Alloys; Magnesium; AZ91D

Articles in the same Issue

  1. Contents
  2. Contents
  3. Review
  4. Current developments of biomedical porous Ti–Mo alloys
  5. Original Contributions
  6. Investigation of crystallization kinetics and deformation behavior in supercooled liquid region of CuZr-based bulk metallic glass
  7. Modeling of hardening and fracture behavior in Gr.65 steel after intercritical heat treatments
  8. Time evolution of agglomerate size of semisolid magnesium alloy AZ91D during a real isothermal shearing
  9. Effect of stirring speed on microstructure of A356 alloy cast through rheometal process
  10. Phase equilibria of the Mo–Al–Ho ternary system
  11. Experimental investigation of phase equilibria in the Zr–Cu–Ni ternary system
  12. Hot corrosion of the ceramic composite coating Ni3Al–Al2O3–Al2O3/MgO plasma sprayed on 316L stainless steel
  13. Tribological properties of B4C–TiB2–TiC–Ni cermet coating produced by HVOF
  14. Electrochemically fabricated Fe–Ni alloy nanowires and their structural characterization
  15. Short Communications
  16. Synthesis and growth mechanisms of ZrC whiskers fabricated by a VLS process
  17. DGM News
  18. DGM News
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