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JOM

, Volume 71, Issue 12, pp 4726–4736 | Cite as

Effect of Pre-compression on Microstructure Evolution of AQ80 Magnesium Alloy in Forward Extrusion and Twist Deformation

  • Xiaoye Liu
  • Liwei LuEmail author
  • Kun Sheng
  • Yao Xiang
  • Zhiqiang WuEmail author
Microstructure Evolution During Deformation Processing
  • 77 Downloads

Abstract

A magnesium alloy, Mg-8Al-0.5Zn-0.2Ag-0.2Mn (AQ80), was extruded by forward extrusion and twist deformation (FETD) at 370°C with 0% and 6% pre-compression. The effect of pre-compression on microstructure and texture of the AQ80 Mg alloy during FETD was systematically investigated. Compared with the 0% pre-compression FETD-ed sample, the 6% pre-compression FETD-ed sample shows a more uniform and finer microstructure and a weaker texture. The effects of pre-twinning on the microstructure and texture during FETD were also investigated. It was found that many {10–12} tension twins were implanted into the as-cast AQ80 Mg alloy by the 6% pre-compression treatment, providing sufficient nucleation sites for subsequent dynamic recrystallization. Combined with microstructure evolution analysis, it can be concluded that the texture development is strongly influenced by the twinning and basal slip during FETD extrusion.

Notes

Acknowledgements

This work was partly supported by National Natural Science Foundation of China (Grant Nos. 51975207 & 51728202), Hunan Provincial Natural Science Foundation for Excellent Young Scholars of China (Grant No. 2019JJ30010) and the Scientific Research Fund of Hunan Provincial Education Department (Grant No. 17B089). Special thanks to Zhuoran Zeng at Monash University for the helpful discussion and proofreading.

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Copyright information

© The Minerals, Metals & Materials Society 2019

Authors and Affiliations

  1. 1.Hunan Provincial Key Laboratory of High Efficiency and Precision Machining of Difficult-to-Cut MaterialHunan University of Science and TechnologyXiangtanPeople’s Republic of China
  2. 2.School of Materials Science and EngineeringHunan University of Science and TechnologyXiangtanPeople’s Republic of China
  3. 3.Hunan Provincial Overseas-Wisdom Innovation Center of New Energy Vehicle in Industrial-Academic-Research CooperationHunan University of Science and TechnologyXiangtanPeople’s Republic of China

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