Irradiation-induced grain growth in nanocrystalline reduced activation ferrite/martensite steel

W. B. Liu, C. Zhang, Y. Z. Ji, Z. G. Yang, H. Zang, T. L. Shen, L. Q. Chen

Research output: Contribution to journalArticle

15 Scopus citations

Abstract

In this work, we investigate the microstructure evolution of surface-nanocrystallized reduced activation ferrite/martensite steels upon high-dose helium ion irradiation (24.3 dpa). We report a significant irradiation-induced grain growth in the irradiated buried layer at a depth of 300-500 nm, rather than at the peak damage region (at a depth of ∼840 nm). This phenomenon can be explained by the thermal spike model: minimization of the grain boundary (GB) curvature resulting from atomic diffusion in the cascade center near GBs.

Original languageEnglish (US)
Article number121905
JournalApplied Physics Letters
Volume105
Issue number12
DOIs
StatePublished - Sep 22 2014

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

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