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초록
The grain coarsening temperature in Nb microalloyed steels is investigated by multiphase-field model. In this study, the pinning force is treated as time-dependent using mean-field kinetics of precipitates including volume fraction and their size. The grain size is calculated with time under various temperature range. The grain coarsening temperature is determined by the ratio of the largest radius of grain vs. the average grain radius criteria (Rmax / Ravg > 2.94) in two-dimensional growth. Through this model, it is possible to simulate grain growth in microalloyed steels more precisely.
키워드
Abnormal grain growth; Grain coarsening temperature; Multiphase-field simulation; Pinning force; Coarsening; Flux pinning; Grain growth; Microalloying; Niobium alloys; Ostwald ripening; Steel metallography; Abnormal grain growth; Grain coarsening; Mean-field kinetics; Multi-phase field simulations; Multi-phase-field model; Nb microalloyed steels; Pinning forces; Two-dimensional growth; Microalloyed steel
- 제목
- Determination of the grain coarsening temperature in Nb microalloyed steels by multiphase-field model
- 저자
- Kim, Jeong Min; Hong, Sok Yun; Jang, Ji Hun; Lee, Kyung Jong
- 발행일
- 2017-05
- 유형
- Conference Paper
- 권
- 879
- 페이지
- 921 ~ 925