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Precipitation kinetics of M23C6 in T/P92 heat-resistant steel by applying soft-impingement correction

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Abstract

A kinetics model for the precipitation of M23C6 in high Cr ferritic heat resistant steel during tempering has been developed assuming the site-saturated nucleation, carbon diffusion-controlled growth and soft-impingement. The growth coefficient in this model is temperature-dependent, and the Arrhenius equation is applied to describe the growth coefficient, in which the growth activation energy is nearly equal to the diffusion activation energy of carbon in martensite. The effect of main parameters in this model has been discussed in detail. By this model, the precipitation of M23C6 during tempering can be predicted accurately in the case of 2D, and a good agreement with experimental data in previous work has been achieved.

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Acknowledgments

The authors are grateful to the National Natural Science Foundation of China, Shanghai Baosteel Group Company (Grant No. 50834011) and the National Natural Science Foundation of China (Grant Nos. 51104107 and No. 51204121) for grant and financial support.

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Authors and Affiliations

  1. State Key Lab of Hydraulic Engineering Simulation and Safety, School of Materials Science and Engineering, Tianjin University, Tianjin, 300072, People’s Republic of China

    Linqing Xu, Dantian Zhang, Yongchang Liu, Baoqun Ning, Zhixia Qiao, Zesheng Yan & Huijun Li

  2. School of Materials Science and Engineering, Tianjin University of Technology, Tianjin, 300384, People’s Republic of China

    Baoqun Ning

  3. School of Mechanical Engineering, Tianjin University of Commerce, Tianjin, 300134, People’s Republic of China

    Zhixia Qiao

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  1. Linqing Xu
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Correspondence to Yongchang Liu.

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Xu, L., Zhang, D., Liu, Y. et al. Precipitation kinetics of M23C6 in T/P92 heat-resistant steel by applying soft-impingement correction. Journal of Materials Research 28, 1529–1537 (2013). https://doi.org/10.1557/jmr.2013.116

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