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

Journal Article · Mon Sep 22 00:00:00 EDT 2014 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4896677· OSTI ID:22350747

Liu, W. B.; Chen, L. Q. ^[1]; Yang, Z. G. ^[1]; Ji, Y. Z. ^[2]; Zang, H. ^[3]; Shen, T. L. ^[4]

---

1. Key Laboratory of Advanced Materials of Ministry of Education, School of Materials Science and Engineering, Tsinghua University, Beijing 100084 (China)
2. Department of Materials Science and Engineering, The Pennsylvania State University, University Park, Pennsylvania 16802 (United States)
3. Department of Nuclear Science and Technology, Xi'an Jiaotong University, Xi'an 710049 (China)
4. Institute of Modern Physics, Chinese Academy of Science, Lanzhou 730000 (China)

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.

• OSTI ID: 22350747
• Journal Information: Applied Physics Letters, Vol. 105, Issue 12; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ATOMIC DISPLACEMENTS
CRYSTALS
DAMAGE
DIFFUSION
FERRITES
GRAIN BOUNDARIES
GRAIN GROWTH
HELIUM IONS
IRRADIATION
LAYERS
MARTENSITE
MINIMIZATION
NANOSTRUCTURES
PHYSICAL RADIATION EFFECTS
RADIATION DOSES
STEELS
SURFACES
THERMAL SPIKES