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JOM

, Volume 71, Issue 12, pp 4696–4704 | Cite as

Effect of Semi-solid Deformation on the Restoration Mechanisms and Texture Evolution in AA7075

  • M. H. Sheikh-Ansari
  • M. Aghaie-KhafriEmail author
Microstructure Evolution During Deformation Processing
  • 25 Downloads

Abstract

In the present study, restoration and texture evolution mechanisms were investigated during the semi-solid hot compression of AA7075 aluminum alloy using electron backscatter diffraction and x-ray diffraction analysis. The results indicated that the restoration mechanism of the alloy at the semi-solid state can be encountered as a combination of continuous dynamic recrystallization (CDRX) and formation of dilatant bands. CDRX occurred because of the homogeneous increase in misorientation and lattice rotation adjacent to grain boundaries. On the other hand, dilatant bands were found to be formed as a result of sliding and rotation of the globular solid grains. Deformation at low strain rates promoted the role of strain accommodation in the liquid phase as well as subsequent formation of dilatant bands. Following hot compression at semi-solid state, a weak fiber texture of \( (200)\left\| {\text{CD}} \right. \) formed at low strain rates, whereas \( (220)\left\| {\text{CD}} \right. \) developed at high strain rates.

Notes

Acknowledgements

The authors are grateful to Prof. N.A. Belov, National University of Science and Technology-MISIS (Moscow), for providing EBSD facilities.

Conflict of interest

The authors declare that they have no conflict of interest.

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Copyright information

© The Minerals, Metals & Materials Society 2019

Authors and Affiliations

  1. 1.Faculty of Materials Science and EngineeringK.N. Toosi University of TechnologyTehranIran

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