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Determination of the grain coarsening temperature in Nb microalloyed steels by multiphase-field model
- Issue Date
- May-2017
- Publisher
- Trans Tech Publications Ltd.
- Keywords
- Abnormal grain growth; Grain coarsening temperature; Multiphase-field simulation; Pinning force
- Citation
- Materials Science Forum, v.879, pp 921 - 925
- Pages
- 5
- Indexed
- SCOPUS
- Journal Title
- Materials Science Forum
- Volume
- 879
- Start Page
- 921
- End Page
- 925
- ISSN
- 0255-5476
1662-9752
- Abstract
- 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.
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