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Hot Deformation Behavior and Workability of As-Cast Dilute Mg-1.2Zn-0.2Y Alloy

  • Xu Zhiming
  • Chen Xinrong
  • Yao Bin
  • Teng JieEmail author
  • Jiang Fulin
  • Fu Dingfa
  • Zhang Hui
  • Chen ChaoyiEmail author
Microstructure Evolution During Deformation Processing

Abstract

Flow stress behavior of as-cast dilute Mg-1.2Zn-0.2Y alloy was studied via uniaxial compression test at temperature (300–450°C) and strain rate (0.001–1 s−1) using a Gleeble-3500 thermal simulation tester. The constitutive equation with the deformation activation energy of 275.9 kJ/mol was established to describe the thermal deformation behavior of the tested material. The processing maps for the Mg alloy were also constructed based on dynamic material modeling. Optical microscopy, x-ray diffraction, transmission electron microscopy and electron backscatter diffraction were utilized to characterize the microstructures formed at elevated temperature. The results indicated that dynamic recovery was the dominant work-softening mechanism of the Mg-1.2Zn-0.2Y alloy at lower temperature and dynamic recrystallization mainly contributed to the deformation softening at higher temperature. The optimal processing parameters of the safe deformation window were identified as temperature of 420–450°C and strain rate of 0.001–0.01 s−1.

Notes

Acknowledgements

The authors acknowledge the financial support of the National Natural Science Foundation of China (Nos. 51574118, 51774124, 51574095) and Key Technologies R&D in Strategic Emerging Industries and Transformation in High-tech Achievements Program of Hunan Province, China (Grant No. 2016GK4056).

Supplementary material

11837_2019_3659_MOESM1_ESM.pdf (241 kb)
Supplementary material 1 (PDF 241 kb)

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Copyright information

© The Minerals, Metals & Materials Society 2019

Authors and Affiliations

  1. 1.College of Materials Science and EngineeringHunan UniversityChangshaPeople’s Republic of China
  2. 2.College of Materials and MetallurgyGuizhou UniversityGuiyangPeople’s Republic of China

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