용접 열영향부 미세조직 및 재질 예측 모델링Ⅳ. Ti-첨가 저합금강에서의 임계 석출물 크기의 영향을 고려한 용접 열영향부 석출물 조대화 예측 모델 |
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Prediction Model for the Microstructure and Properties in Weld Heat Affected Zone : Ⅳ. Critical Particle Size for the Particle Coarsening Kinetics in Weld HAZ of Ti Added Low Alloyed Steel |
Joonoh Moon, Sanghoon Kim, Hongchul Jeong, Jongbong Lee, Changhee Lee |
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Abstract |
A kinetic model for the particle coarsening behavior was developed. The proposed model considered the critical particle size which can be derived from Gibbs-Thomson equation unlike the conventional approach. In this study, the proposed particle coarsening model was applied to study the coarsening behavior of titanium nitride (TiN particle) in microalloyed steel weld HAZ. Particle size distributions and mean particle size by the proposed model were in agreement with the experimental results. Meanwhile, using additivity rule, the isothermal model was extended to predict particle coarsening behavior during continuous thermal cycle. |
Key Words:
Critical particle size, TiN particle, Gibbs-Thomson equation, Coarsening |
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