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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2018.1
- 수록면
- 955 - 969 (15page)
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초록· 키워드
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The hot deformation behavior of a high strength low carbon steel was investigated using hot compression test at the temperaturerange of 850–1100 °C and under strain rates varying from 0.001 to 1 s −1 . It was found that the fl ow curves of the steelwere typical of dynamic recrystallization at the temperature of 950 °C and above; at tested strain rates lower than 1 s −1 . Avery good correlation between the fl ow stress and Zener–Hollomon parameter was obtained using a hyperbolic sine function. The activation energy of deformation was found to be around 390 kJ mol −1 . The kinetics of dynamic recrystallization of thesteel was studied by comparing it with a hypothetical dynamic recovery curve, and the dynamically fraction recrystallizedwas modeled by the Kolmogorov–Johnson–Mehl–Avrami relation. The Avrami exponent was approximately constant around1.8, which suggested that the type of nucleation was one of site saturation on grain boundaries and edges.
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