Cascade fragmentation: deviation from power law in primary radiation damage. Issue 5 (3rd September 2017)

• Record Type: Journal Article
• Authors: Sand, A. E.; Mason, D. R.; De Backer, A.; Yi, X.; Dudarev, S. L.; Nordlund, K.
• Is Part Of: Materials research letters. Volume 5:Issue 5(2017)
• Page Start: 357
• Page End: 363
• Publication Date: 2017-09-03
• Subjects: Atomistic simulations -- lattice defects -- tungsten -- radiation damage; Materials science -- Research -- Periodicals; Biomedical materials -- Research -- Periodicals; Composite materials -- Research -- Periodicals; Biomedical materials -- Research; Composite materials -- Research; Materials science -- Research; Periodicals; 620.1105
• DOI: 10.1080/21663831.2017.1294117
• Languages: English
• ISSNs: 2166-3831

Abstract

ABSTRACT: The sizes of defect clusters, produced in materials by energetic ion or neutron impacts, are critically important input for models describing microstructural evolution of irradiated materials. We propose a model for the distribution of sizes of vacancy and self-interstitial defect clusters formed by high-energy impacts in tungsten, and provide new data from in situ ion irradiation experiments to validate the model. The model predicts the statistics of sub-cascade splitting and the resulting distribution of primary defects extending over the entire range of cluster sizes, and is able to provide initial conditions for quantitative multi-scale simulations of microstructural evolution. GRAPHICAL ABSTRACT: IMPACT STATEMENT We present a model, parameterized for tungsten, for the distribution of defect sizes in primary radiation damage, as an essential step in multi-scale modelling of microstructural evolution in irradiated materials.