The Deformation Microstructure and Eutectic Melting Activation Energy of AZ91D Alloy

Wang Wuxiao*, Dong Zhiqiao, Fan Zhikang, Kang Chunsheng
Xi’an University of Technology, Xi’an Shaanxi 710048, P.R. China.

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© 2009 Wuxiao et al.;

open-access license: This is an open access article distributed under the terms of the Creative Commons Attribution 4.0 International Public License (CC-BY 4.0), a copy of which is available at: This license permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

* Address correspondence to this author at the Xi’an University of Technology, Xi’an Shaanxi 710048, P.R. China; Tel: +86-029-82312557; Fax: +86-029-82312994; E-mail: ,


The effect of deformation degree on deformation microstructure in the preparation of semi-solid AZ91D alloy billet by Strain Induced Melt Activated (SIMA) process was studied and the relationship between deformation degree and eutectic melting activation energy was studied by Differential Scanning Calorimetry (DSC). The results showed that with an increase in deformation degree, the original microstructure of the alloy changed from dendrites to fragmentary grains where there were twins and dislocations. When the deformation degree was 40%, the decreased amount of eutectic melting activation energy was not significant. Melting point of eutectic decreased slightly with increasing deformation degree.

Keywords: AZ91D alloy, SIMA, deformation degree, eutectic melting activation energy, deformation microstructure, DSC.