지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2010.1
- 수록면
- 843 - 849 (7page)
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초록· 키워드
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Hot deformation behavior of AISI 410 martensitic stainless steel was investigated by conducting hot compression tests at a temperature range of 900 °C to 1150 °C and a strain rate of 0.001-1s−1. The relation between flow stress and Zener-Hollomon (Z) parameter was successfully modeled via the hyperbolic sine function under a wide range of deformation conditions, and the values were determined for the apparent activation energy, Q, and the empirical material constants A and n. Power-law equations show that the values of the peak and steady-state stress are related to the dimensionless parameter Z/A. The results also show that the flow stress deviates from linear dependence on the Z/A parameter at ασ < 0.8 and ασ > 1.2. The deviations reflect the power and exponential equations, respectively, for low and high stress levels. The way the peak and steady-state strains vary with the Z parameter was studied and best models were developed. A model based on the Avrami equation was developed to estimate the kinetics of the dynamic recrystallization (DRX)for different deformation conditions. The results of the model show that the Avrami exponent decreases as Z rises. In addition, the Avrami constant of k bears no distinct relation with Z. The optical microscopy observations of prior austenite grains confirm that the DRX grain size has an adverse relation with the Z parameter.
The best relation between the DRX grain size and the Z/A ratio is proposed on the basis of the grain size measurements.
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