Effect of FOD on fatigue strength of Ti-6Al-4V alloy

Hisao Matsunaga, Yukitaka Murakami

研究成果: ジャーナルへの寄稿学術誌査読

4 被引用数 (Scopus)

抄録

In order to investigate the effects of Foreign-object damage (FOD) on fatigue strength of Ti-6Al-4V alloy, the FOD was simulated by shooting a steel ball with a diameter φ = 4.7 mm onto specimen surface at a velocity of 90 m/s using a compressed-air gun facility. Tension-compression fatigue tests clarified that the fatigue limit of the specimen having shot marks (FOD) was 56% lower than that of smooth specimen. The shot mark also decreased the fatigue life of specimens remarkably. Fracture origins of the specimen having shot marks were at the bottom of the shot mark in all specimens. The fatigue limit of the specimen having shot marks was evaluated quantitatively from the viewpoint of the following factors, (1) residual stress distribution inside and vicinity of the shot mark, (2) work hardening related with plastic deformation at the bottom of the shot mark and cyclic softening at the stress amplitude of fatigue limit, and (3) the size of shot mark which acts as a detrimental defect. A narrow beam with size □ 100μm × 100μm using a synchrotron radiation facility at SPring-8 was used for the measurement of the residual stress distribution. The fatigue limit of the specimen having shot marks can be predicted within 10% error by the √area parameter model even in the case the residual stress was ignored.

本文言語英語
ページ(範囲)1259-1266
ページ数8
ジャーナルZairyo/Journal of the Society of Materials Science, Japan
51
11
DOI
出版ステータス出版済み - 11月 2002

!!!All Science Journal Classification (ASJC) codes

  • 材料科学一般
  • 凝縮系物理学
  • 材料力学
  • 機械工学

フィンガープリント

「Effect of FOD on fatigue strength of Ti-6Al-4V alloy」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

引用スタイル