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The Effect of Prestrain Temperature on Kinetics of Static Recrystallization, Microstructure Evolution, and Mechanical Properties of Low Carbon Steel

  • Edris Akbari
  • Kourosh Karimi Taheri
  • Ali Karimi Taheri
Article

Abstract

In this research, the samples of a low carbon steel sheet were rolled up to a thickness prestrain of 67% at three different temperatures consisted of room, blue brittleness, and subzero temperature. Microhardness, SEM, and tensile tests were carried out to evaluate the static recrystallization kinetics defined by the Avrami equation, microstructural evolution, and mechanical properties. It was found that the Avrami exponent is altered with change in prestrain temperature and it achieves the value of 1 to 1. 5. Moreover, it was indicated that prestraining at subzero temperature followed by annealing at 600 °C leads to considerable enhancement in tensile properties and kinetics of static recrystallization compared to room and blue brittleness temperatures. The prestraining at blue brittleness temperature followed by annealing treatment caused, however, a higher strength and faster kinetics compared with that at room temperature. It was concluded that although from the steel ductility point of view, the blue brittleness temperature is called an unsuitable temperature, but it can be used as prestraining temperature to develop noticeable combination of strength and ductility in low carbon steel.

Keywords

annealing treatment Avrami exponent blue brittleness temperature prestrain temperature rolling process static recrystallization tensile properties 

Notes

Acknowledgments

The authors would like to thank the research board of Sharif University of Technology, Tehran, Iran, for the provision of the research facilities used in this work.

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Copyright information

© ASM International 2018

Authors and Affiliations

  • Edris Akbari
    • 1
  • Kourosh Karimi Taheri
    • 2
  • Ali Karimi Taheri
    • 1
  1. 1.Department of Materials Science and EngineeringSharif University of TechnologyTehranIran
  2. 2.Mechanical and Industrial Engineering DepartmentNortheastern UniversityBostonUSA

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