Small fatigue crack growth behavior from artificial notch with focused ion beam in annealed 0.45% carbon steel

Junji Sakamoto, Yoshimasa Takahashi, Hiroshi Noguchi

研究成果: 書籍/レポート タイプへの寄稿会議への寄与

抄録

The aim of this study is firstly to investigate the applicability of a sharp notch with Focused Ion Beam (FIB) as a crack for fatigue limit evaluation. Secondly we investigate a condition in which artificial defects (drilled hole, FIB notch) can be used as a crack for fatigue limit evaluation. To achieve the aim, the growth behaviors and the non-propagating crack sizes of small fatigue cracks initiated from a FIB notch and a drilled hole are carefully compared with those of an annealed fatigue crack which imitates an ideally sharp crack. The results show that a FIB notch can be used as a crack for fatigue limit evaluation under some conditions. The results also show that the condition which controls the applicability of an artificial defect as an ideal crack for fatigue limit evaluation is strongly dependent on the relation between (i) the length of a non-propagating fatigue crack and (ii) the crack length when the small fatigue crack growth behaviors from an artificial defect and an ideal pre-crack become almost the same. It is found that the length of (ii) can be obtained by the analyses using the number of cycles from a certain crack length to failure.

本文言語英語
ホスト出版物のタイトルAdvances in Fracture and Damage Mechanics X
ページ319-322
ページ数4
DOI
出版ステータス出版済み - 1月 1 2012
イベント10th International Conference on Fracture and Damage Mechanics, FDM2011 - Dubrovnik, クロアチア
継続期間: 9月 19 20119月 21 2011

出版物シリーズ

名前Key Engineering Materials
488-489
ISSN(印刷版)1013-9826

その他

その他10th International Conference on Fracture and Damage Mechanics, FDM2011
国/地域クロアチア
CityDubrovnik
Period9/19/119/21/11

!!!All Science Journal Classification (ASJC) codes

  • 材料科学(全般)
  • 材料力学
  • 機械工学

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