Journal of Materials Engineering and Performance

, Volume 26, Issue 4, pp 1967–1977 | Cite as

Hot Deformation Behavior and Intrinsic Workability of Carbon Nanotube-Aluminum Reinforced ZA27 Composites

  • Yang Liu
  • Cong Geng
  • Yunke Zhu
  • Jinfeng Peng
  • Junrui Xu
Article
  • 141 Downloads

Abstract

Using a controlled thermal simulator system, hybrid carbon nanotube-aluminum reinforced ZA27 composites were subjected to hot compression testing in the temperature range of 473-523 K with strain rates of 0.01-10 s−1. Based on experimental results, a developed-flow stress model was established using a constitutive equation coupled with strain to describe strain softening arising from dynamic recrystallization. The intrinsic workability was further investigated by constructing three-dimensional (3D) processing maps aided by optical observations of microstructures. The 3D processing maps were constructed based on a dynamic model of materials to delineate variations in the efficiency of power dissipation and flow instability domains. The instability domains exhibited adiabatic shear band and flow localization, which need to be prevented during hot processing. The recommended domain is predicated to be within the temperature range 550-590 K and strain rate range 0.01-0.35 s−1. In this state, the main softening mechanism is dynamic recrystallization. The results from processing maps agree well with the microstructure observations.

Keywords

3D processing maps carbon nanotubes dynamic recrystallization hot deformation zinc-aluminum matrix composites 

Notes

Acknowledgments

The work was supported by the Natural Science Foundation of Hunan Province, China (Grant No. 2016JJ3124) and General project of the education department of Hunan Province (Grant No.16C1526). We thank Dr. Lianghong Xiao, Dr. Wenjuan Zhao, and Dr. Weinan Cao for test assistance.

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Copyright information

© ASM International 2017

Authors and Affiliations

  • Yang Liu
    • 1
  • Cong Geng
    • 1
  • Yunke Zhu
    • 1
  • Jinfeng Peng
    • 1
  • Junrui Xu
    • 1
  1. 1.School of Mechanical EngineeringXiangtan UniversityXiangtanChina

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