MODE II CRACK OBSERVED AT THE ORIGIN OF FISH EYE FOR SCr 420 CARBURIZED STEEL.

Chitoshi Masuda, Satoshi Nishijima, Hideshi Sumiyoshi, Yoshihisa Tanaka, Akira Ishii

研究成果: Article査読

3 被引用数 (Scopus)

抄録

The mechanism of the initiation of fish eye failure was examined by stereography of the fracture surface of SCr 420 carburized steel tested under rotating bending. Three modes of fish eye nucleation were observed: mode I crack initiation from nonmetallic inclusion (ni), mode II crack initiation from ni followed by the transition to mode I crack, and mode II crack initiation at the martensitic lath interface. The mode II crack plane was close to or less inclined than the plane of maximum shear stress. The maximum length of mode II crack was longer when the local stress at the origin was lower. The transition from mode II to mode I occurred at the threshold mode I stress intensity factor.

本文言語English
ページ(範囲)664-669
ページ数6
ジャーナルZairyo/Journal of the Society of Materials Science, Japan
34
381
出版ステータスPublished - 1985 6
外部発表はい

ASJC Scopus subject areas

  • 化学工学(その他)
  • 金属および合金
  • ポリマーおよびプラスチック

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