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Analysis of soft impingement in nonisothermal precipitation

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Abstract

The effects of soft impingement on precipitation are considered. A physically realistic analytical treatment of soft impingement has been developed for solid-state precipitation in a nonisothermal heating/cooling process following the basic assumptions (i.e., a two-stage transformation including site saturation of nucleation, isotropic growth and linear approximation for a concentration gradient in front of the precipitate/matrix interface). Furthermore, both one- and three-dimensional precipitations have been described using a compact expression which is analogous to Zener’s model but with a temperature-dependent growth coefficient. A detailed description for the model parameters has been given for the model application. Good agreement with published experimental data, for example, the decomposition of austenite in a 0.038–0.30wt%Mn plain carbon steel, has been achieved.

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Authors and Affiliations

  1. State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi’an, Shaanxi, 710072, People’s Republic of China

    Kai Fan, Feng Liu, Yang Wei, Gencang Yang & Yaohe Zhou

Authors
  1. Kai Fan
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  2. Feng Liu
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  3. Yang Wei
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  4. Gencang Yang
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  5. Yaohe Zhou
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Correspondence to Feng Liu.

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Fan, K., Liu, F., Wei, Y. et al. Analysis of soft impingement in nonisothermal precipitation. Journal of Materials Research 24, 3664–3673 (2009). https://doi.org/10.1557/jmr.2009.0434

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