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Formation and characterization of hot tearing in AZ series alloys

  • Wenjun Liu , Bin Jiang , Suqin Luo and Bo Liu
Published/Copyright: July 27, 2018
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International Journal of Materials Research
From the journal International Journal of Materials Research Volume 109 Issue 8

Abstract

Hot tearing susceptibility (HTS) of AZ31, AZ61, and AZ91 magnesium alloys was investigated with the constrained rod casting process at an average cooling rate of 1.5 K s−1. The experimental results showed that the maximum HTS that was associated with the AZ31 alloy resulted from the coarse dendrites and poor feeding ability during the final stages of solidification. The HTSs in the AZ91 and AZ61 alloys were much smaller, due to the finer microstructure and good feeding ability. The results were verified through examination of the as-cast microstructure, and simulation of the solidification process.

Keywords: Mg–Al–Zn alloys; Hot tearing; Fracture morphology; Phase diagram; Secondary phase
*Correspondence address, Prof. Bin Jiang, College of Materials Science and Engineering, Chongqing University, NO. 174 Shazheng Street, Chongqing 400030, P.R. China, Tel.: +86 13594190166, Fax: +86 23 65111140, E-mail: (B. Jiang), (W. Liu)

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Received: 2017-08-21
Accepted: 2018-03-12
Published Online: 2018-07-27
Published in Print: 2018-08-10

© 2018, Carl Hanser Verlag, München

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https://doi.org/10.3139/146.111661
Keywords for this article
Mg–Al–Zn alloys; Hot tearing; Fracture morphology; Phase diagram; Secondary phase

Articles in the same Issue

  1. Contents
  2. Contents
  3. Original Contributions
  4. Dynamic fragmentation and spheroidization of α phase grains during hot deformation of Ti-6Al-4V alloy
  5. Formation and characterization of hot tearing in AZ series alloys
  6. The effect of quench-aging on the mechanical properties of Zn-27Al-1Cu alloy
  7. Microstructural and mechanical properties of novel β-type Ti–Nb–Ni alloys containing a second phase
  8. Microstructure evolution mechanisms of undercooled Ni80Cu20 alloys
  9. Microstructures and tensile properties of CuZrAlNb metallic glass composites under different cooling rates
  10. Influence of a rare-earth element on the solidification behaviour and mechanical properties of undercooled Al–Si alloys
  11. Microstructure of aluminide coatings on Ti6Al4V alloy produced by the slurry method with inorganic binder
  12. Ultrathin SnO2 nanorod/reduced graphene oxide nanosheet composites for electrochemical supercapacitor applications with excellent cyclic stability
  13. Combustion synthesis and formation mechanism of silver nanoparticles
  14. Phase relationship of the Ag–Zr–Cr system at 1000 and 750°C
  15. Thermal properties of carbonized composite materials based on carbon filled elastomeric matrices
  16. Short Communications
  17. Surface morphology and phase stability of titanium irradiated with 168 MeV 136Xe ions
  18. DGM News
  19. DGM News
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