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Dislocation Loop Formation and Growth under In Situ Laser and/or Electron Irradiation

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Title: Dislocation Loop Formation and Growth under In Situ Laser and/or Electron Irradiation
Authors: Yang, Zhanbing Browse this author
Sakaguchi, Norihito Browse this author
Watanabe, Seiichi Browse this author
Kawai, Masayoshi Browse this author
Keywords: Applied physics
Modelling and theory
Materials physics
Nuclear physics
Issue Date: 12-Dec-2011
Publisher: Nature Publishing Group
Journal Title: Scientific Reports
Volume: 1
Start Page: 190
Publisher DOI: 10.1038/srep00190
Abstract: Vacancies and interstitial atoms are primary lattice (point) defects that cause observable microstructural changes, such as the formation of dislocation loops and voids in crystalline solids. These defects’ diffusion properties determine the phase stability and environmental resistibility of macroscopic materials under ambient conditions. Although in situ methods have been proposed for measuring the diffusion energy of point defects, directmeasurement has been limited. In this study, we propose an alternative in situ method to measure the activation energy for vacancymigration under laser irradiation using a pulsed laser beamfroma laser-equipped high-voltage electron microscope (laser-HVEM).We made in situ observations that revealed the formation and growth of vacancy dislocation loops in an austenitic stainless steel during laser irradiation. These loops continued to grow when thermal annealing was performed after laser irradiation at the same temperature. We anticipate that laser-HVEM will provide a new method for investigating lattice defects.
Type: article
Appears in Collections:工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 渡辺 精一

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