(100)-loop characterization in alpha-Fe: comparison between experiments and modeling

Ferritic/martensitic steels considered as first-wall candidate materials for fusion reactors experience significant radiation hardening at temperatures below similar to400 degreesC. Experimental evidence suggests that the observed defects are large interstitial dislocation loops with Burgers vector b = <100> and b = (1)/(2)<111>. In this work, the atomic character of <100> and (1)/(2)<111> loops is investigated with molecular dynamics simulations and the atomic configurations are used to calculate the defect image contrast through direct simulation of TEM images. The simulated images are subsequently compared with actual TEM micrographs of irradiated ferritic materials and are in very good qualitative agreement, providing strong indication that the observed b = <100> loops are interstitial in nature. (C) 2002 Elsevier Science B.V. All rights reserved.


Published in:
Journal of Nuclear Materials, 307, 871-875
Year:
2002
ISSN:
0022-3115
ISBN:
0022-3115
Note:
Part B
Other identifiers:
DAR: 3328
Laboratories:
SPC
CRPP




 Record created 2008-04-16, last modified 2018-09-13


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