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Temperature Effects on the Microstructures of Mg–Gd–Y Alloy Processed by Multi-direction Impact Forging

  • S. S. A. Shah
  • D. Wu
  • R. S. ChenEmail author
  • G. S. SongEmail author
Article
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Abstract

A high strain rate multi-directional impact forging (MDIF) was applied to a solutionized Mg–Gd–Y–Zr alloy in the temperature range of 350–500 °C. Results demonstrate that the dominant deformation mode is twinning at a temperature below 400 °C, whereas at a medium temperature of 450 °C considerable continuous dynamic recrystallization was promoted by {10–12} extension twins. At a higher temperature of 500 °C, twinning activation was suppressed. New DRX grains were observed but their sizes were much bigger than those resulting from the MDIFed 50 passes at 450 °C, which are ascribed to the larger grain boundary mobility and atomic diffusion at 500 °C. Moreover, a non-basal weak texture was gained afterward MDIF at each temperature, which is credited to the MDIF process and the minor strain applied in each pass.

Keywords

Magnesium alloys Twinning Dynamic recrystallization Forging Texture 
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Notes

Acknowledgements

This work was supported by the National Key Research and Development Program of China (No. 2016YFB0301104), the National Natural Science Foundation of China (NSFC, Nos. 51301173, 51531002 and 51601193), and the National Basic Research Program of China (973 Program, No. 2013CB632202).

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Copyright information

© The Chinese Society for Metals (CSM) and Springer-Verlag GmbH Germany, part of Springer Nature 2019

Authors and Affiliations

  1. 1.School of Material Science and EngineeringAnhui University of TechnologyMa’anshanChina
  2. 2.The Group of Magnesium Alloys and Their Applications, Institute of Metal ResearchChinese Academy of SciencesShenyangChina

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