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The effect of prestrain temperature on kinetics of static recrystallization, microstructure evolution, and mechanical properties of low carbon steel

Akbari, E ; Sharif University of Technology | 2018

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  1. Type of Document: Article
  2. DOI: 10.1007/s11665-018-3328-4
  3. Publisher: Springer New York LLC , 2018
  4. Abstract:
  5. 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. © 2018, ASM International
  6. Keywords:
  7. Annealing treatment ; Blue brittleness temperature ; Prestrain temperature ; Annealing ; Brittleness ; Crystal microstructure ; Ductility ; Fracture mechanics ; Kinetics ; Mechanical properties ; Plasticity ; Recrystallization (metallurgy) ; Tensile properties ; Tensile testing ; Annealing treatments ; Avrami exponent ; Blue brittleness ; Rolling process ; Static recrystallization ; Low carbon steel ; Prestrain
  8. Source: Journal of Materials Engineering and Performance ; Volume 27, Issue 5 , 2018 , Pages 2049-2059 ; 10599495 (ISSN)
  9. URL: https://link.springer.com/article/10.1007/s11665-018-3328-4