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Onset of plasticity of helium-implanted ferritic/martensitic steels during nanoindentation
| Title: | Onset of plasticity of helium-implanted ferritic/martensitic steels during nanoindentation |
| Authors: | Chen, Siwei Browse this author | | Wang, Yongming Browse this author | | Hashimoto, Naoyuki Browse this author | | Ohnuki, Somei Browse this author →KAKEN DB |
| Keywords: | incipient plasticity | | helium implantation | | oxide particle | | nanoindentation |
| Issue Date: | Jul-2014 |
| Publisher: | Taylor & Francis |
| Journal Title: | Philosophical Magazine Letters |
| Volume: | 94 |
| Issue: | 7 |
| Start Page: | 433 |
| End Page: | 438 |
| Publisher DOI: | 10.1080/09500839.2014.921347 |
| Abstract: | The onset of plasticity during nanoindentation is a new method to investigate the irradiation damage of structural materials in fission and fusion reactors. In this paper, nanoindentation experiment was carried out to helium implanted F82H-IEA and nano-sized oxide dispersion strengthened F82H-ODS steels for studying the elastic-plastic transition at a constant loading rate. The onset of plasticity shifted after helium implantation. By a statistical thermal activation model, activation volume was extracted to discuss the strength of barrier for dislocation motion. The results reveal an increase in the pinning force and number density of effective obstacles for dislocation motion in He-implanted F82H-IEA, and a decrease in the local pinning force without changing the density of effective obstacles in He-implanted F82H-ODS. |
| Rights: | This is an Accepted Manuscript of an article published by Taylor & Francis in Philosophical Magazine Letters on July 2014, available online: http://www.tandfonline.com/10.1080/09500839.2014.921347 |
| Type: | article (author version) |
| URI: | http://hdl.handle.net/2115/59456 |
| 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)
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Submitter: 大貫 惣明
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