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Microstructure evolution and strength degradation mechanisms of high-strength Al–Fe wire

  • J. P. Hou
  • R. Li
  • X. M. Wu
  • H. Y. Yu
  • Z. J. Zhang
  • Q. Y. Chen
  • Q. Wang
  • X. W. Li
  • Z. F. Zhang
Metals
  • 28 Downloads

Abstract

The strengthening mechanisms and the strength degradation behaviors of the high-strength Al–Fe wire were investigated in this study. The dispersed nano-scale precipitates, the <111> texture and the fine grains in the radial section of the Al–Fe wire are the three main strengthening factors, i.e., precipitation strengthening, texture strengthening and grain-boundary strengthening. Besides, during the annealing process, the strength degradation behaviors of the Al–Fe wires due to the coarsening of precipitates and grains as well as the texture evolution were quantitatively calculated. Finally, the strength degradation mechanisms were divided into three stages by the annealing temperatures. In stage I (0–90 °C), the slight decrease of strength is attributed to the recovery of defects including vacancies and dislocations. In stage II (90–200 °C), the loss of strength is mainly caused by the coarsening of precipitates leading to a decrease of precipitation strengthening. In stage III (200–300 °C), the grain growth is responsible for the strength degradation of the Al–Fe wire. Besides, the thermo-stability of grain increases to 150 °C in the Al–Fe wire due to the precipitates formed at the grain boundaries.

Notes

Acknowledgements

This work was financially supported by State Grid Corporation of China (52110416001z) and the National Natural Science Foundation of China (NSFC) under Grant No. 51331007.

Compliance with ethical standards

Conflict of interest

The authors declare that they have no conflict of interest.

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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2018

Authors and Affiliations

  1. 1.Department of Materials Physics and Chemistry, School of Materials Science and Engineering, Key Laboratory for Anisotropy and Texture of Materials, Ministry of EducationNortheastern UniversityShenyangPeople’s Republic of China
  2. 2.Materials Fatigue and Fracture Division, Institute of Metal ResearchChinese Academy of SciencesShenyangPeople’s Republic of China
  3. 3.National Quality Supervision and Inspection Center of Electrical Equipment Safety PerformanceZhejiang Huadian Equipment Testing InstituteHangzhouPeople’s Republic of China
  4. 4.Electric Power Research Institute of Liaoning Electric Power Co., Ltd,Liaoning Electric Power Co., Ltd.ShenyangPeople’s Republic of China

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