期刊
JOURNAL OF NUCLEAR MATERIALS
卷 465, 期 -, 页码 843-848出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jnucmat.2015.05.046
关键词
Dislocation; In-situ transmission electron microscope observation; Cavity; Irradiation hardening; Obstacle barrier strength; Cross-slip; Line tension force
资金
- Ministry of Education, Culture, Sports, Science and Technology, Japan (MEXT Grant) [26420865]
- Kansai Atomic Conference
- Technical Division of Faculty of Engineering in University of Fukui, Japan
- Grants-in-Aid for Scientific Research [26420865] Funding Source: KAKEN
To investigate the effect of irradiation hardening of structural materials due to cavity formation in BCC metals for nuclear applications, an in-situ transmission electron microscopy (TEM) observation in tensile test was performed for the helium ion-irradiated specimens of pure molybdenum and pure iron. The obstacle barrier strength, a was calculated from the bow-out dislocation based on line tension model, and the obstacle barrier strengths of cavity in pure molybdenum and pure iron were about 0.5-0.7. The fractions of cross-slip generation of dislocation of screw type due to interaction with the cavities were about 16-18 % for pure molybdenum. (C) 2015 Elsevier B.V. All rights reserved.
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