Effect of RRA Treatment on the Properties and Microstructural Evolution of Al–Zn–Mg–Cu–Er–Zr Alloy

  • Xiaofei Wang
  • Zuoren Nie
  • Hui Huang
  • Shengping Wen
  • Kunyuan Gao
  • Xiaolan Wu
Conference paper


Effect of RRA treatment on the mechanical properties and microstructure of Al–Zn–Mg–Cu–Er–Zr aluminium alloy was researched by hardness measurement, conductivity measurement, exfoliation corrosion measurement, transmission electron microscopy (TEM). Discussed the relationship between the regression treatment and composite properties of the alloy. The study found that the hardness of RRA treated alloys first rise and then decline with the increasing of regression time, but the corrosion performance is increasing all the time. After pre-aging treatment 120 °C/24 h, regression treatment 180 °C/60 min, re-aging treatment 120 °C/24 h, the combination property of the alloy is optimal, the hardness, conductivity and the exfoliation corrosion grade are respectively: 207.6 HV, 33.53%IACS, PC. At this moment, it is found from the TEM observations that the matrix precipitates are small and dispersed, resemble to T6 temper. The grain boundary precipitation out phases are discontinuous distribution and the relatively wider PFZ, similar to the T73 temper.


Al–Zn–Mg–Cu–Er–Zr alloy RRA treatment Mechanical property Corrosion properties TEM microstructures 



The authors would acknowledge support from National Natural Science Foundation of China (51671005), Beijing Natural Science Foundation (2162006), the National Key Research and Development Program of China (2016YFB0300804 and 2016YFB0300801), National Natural Science Fund for Innovative Research Groups (51621003) and Program on Jiangsu Key Laboratory for Clad Materials (BM2014006).


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Copyright information

© Springer Nature Singapore Pte Ltd. 2018

Authors and Affiliations

  • Xiaofei Wang
    • 1
  • Zuoren Nie
    • 1
  • Hui Huang
    • 1
  • Shengping Wen
    • 1
  • Kunyuan Gao
    • 1
  • Xiaolan Wu
    • 1
  1. 1.School of Materials Science and EngineeringBeijing University of TechnologyBeijingPeople’s Republic of China

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