Ion-irradiation-induced clustering in Fe-Mn-Ni-(Si) steels: Nucleation, growth and chemistry evolution

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外文摘要：© 2021This research addresses kinetics and thermodynamics of clustering in Fe-Mn-Ni-(Si) steels under high-energy Fe ions irradiation at 623 K, a dose rate of (4.6 ± 0.3) × 10-4 dpa/s and doses up to 1.5 dpa, to gain deep insights into nucleation, growth and chemistry modification of solute clusters using atom probe tomography. The investigation, for the first time, reveals that the clustering in the steels involves two kinetic processes i.e. Mn-Ni-(Si) cluster chemistry modification and size growth. The chemistry modification by which the clusters reach a stable chemistry is accomplished prior to cluster fast growth. The slow chemistry modification makes the Mn-Ni-(Si) clusters exhibit rapid growth subsequently (via coalescing adjacent clusters). Si addition slows down the cluster chemistry modification, with 0.6 dpa required for the Mn-Ni clusters to approach a stable composition, less than 1.5 dpa for the Mn-Ni-Si clusters. The Si addition enhances nucleation of Mn-Ni-Si clusters, prolongs cluster composition modification, and delays the commencement of their fast growth.

外文关键词：

Atom probe tomographyClustering, KineticsFe-Mn-Ni-(Si) steelsIon irradiation

作者：

Sha G.、Xue F.、Xue J.、Jin S.、Hu R.

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作者单位：

Key Laboratory for Light-weight Materials School of Materials Science and Engineering Nanjing Tech University Herbert Gleiter Institute of Nanoscience Nanjing University of Science and Technology

Suzhou Nuclear Power Research Institute

出版年：

2022

DOI：

10.1016/j.jnucmat.2021.153477

Journal of Nuclear Materials

EISCI

ISSN：0022-3115

年,卷(期)：2022.560

参考文献量84