Effect of prestrain on fatigue crack growth of age-hardened Al 6061-T6

Koji Ikematsu, Takuhiro Mishima, Minwoo Kang, Yuuta Aono, Hiroshi Noguchi

研究成果: Chapter in Book/Report/Conference proceedingConference contribution

2 被引用数 (Scopus)

抄録

The effect of prestrain on fatigue crack growth characteristic (FCGC) of age-hardened Al 6061-T6 was investigated. Al 6061-T6 specimens were subjected to tension to produce plastic strain. Extruded bars were prepared to investigate FCGC. Specimens with an artificial hole from the bar were used to observe Mode I fatigue crack. On the other hand, coarse-grained plain specimens were used and observed for Mode II fatigue crack. Fatigue tests were performed under a rotating bending load (R = -1). The experimental results showed the Mode I fatigue crack growth rates decelerated a little due to prestrain. However, in the case of Mode II, fatigue crack growth rates of prestrain specimens accelerated about ten times due to prestrain. The Mode II fatigue crack easily propagates on the slip bands, because precipitation particles on the slip bands are sheared by prestrain. The result means the influence of prestrain on Mode II fatigue should be taken into account for damage-tolerant design.

本文言語英語
ホスト出版物のタイトルFatigue and Fracture Mechanics
ホスト出版物のサブタイトル36th Volume
出版社American Society for Testing and Materials
ページ561-573
ページ数13
ISBN(印刷版)9780803134164
DOI
出版ステータス出版済み - 2009
イベント36th ASTM National Symposium on Fatigue and Fracture Mechanics - Tampa, FL, 米国
継続期間: 11 14 200711 16 2007

出版物シリーズ

名前ASTM Special Technical Publication
1508 STP
ISSN(印刷版)0066-0558

その他

その他36th ASTM National Symposium on Fatigue and Fracture Mechanics
国/地域米国
CityTampa, FL
Period11/14/0711/16/07

All Science Journal Classification (ASJC) codes

  • 材料科学(全般)

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