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Effects of vacuum environment on small fatigue crack propagation in Ti-6Al-4V

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Title: Effects of vacuum environment on small fatigue crack propagation in Ti-6Al-4V
Authors: Yoshinaka, Fumiyoshi Browse this author
Nakamura, Takashi Browse this author →KAKEN DB
Takaku, Kazuaki Browse this author
Keywords: Small fatigue crack propagation
Vacuum
Inert gas
Gigacycle fatigue
Internal fracture
Issue Date: Oct-2016
Publisher: Elsevier
Journal Title: International journal of fatigue
Volume: 91
Start Page: 29
End Page: 38
Publisher DOI: 10.1016/j.ijfatigue.2016.05.024
Abstract: Small fatigue crack propagation tests were conducted on Ti-6Al-4V in ultrahigh vacuum, air, and argon to clarify the effects of vacuum on crack propagation processes. The crack propagation rate in vacuum was significantly lower than that in air. The crack propagation rate in argon agreed with that in air in the small crack regime; however, it became similar to that in vacuum in the long crack regime. This indicates that the existence of gases has significant effects in the small crack regime, even if they are chemically inert. These results led us to conclude that, in addition to chemical inactivity, the absence of physical adsorption plays an important role in the retarding effect of vacuum on small crack propagation.
Rights: © 2016. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/
http://creativecommons.org/licenses/by-nc-nd/4.0/
Type: article (author version)
URI: http://hdl.handle.net/2115/71584
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: 吉中 奎貴

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