Application of controlled Cu nano-precipitation for improvement in fatigue properties of steels

Tatsuo Yokoi, Manabu Takahashi, Naoki Maruyama, Masaaki Sugiyama

研究成果: Contribution to journalReview article査読

1 被引用数 (Scopus)

抄録

In order to improve fatigue properties of steels, it is essential to inhibit crack initiation and crack propagation. Crack propagation mainly depends on the micro-order structure, for example, the grain boundary and the texture. To the contrary, crack initiation depends on the nano-order structure, for example, precipitation, slip and dislocation motion. By the way, it is reported that Cu in steel exhibit high resistance to fatigue crack initiation, but the mechanisms causing Cu to have this effect have not yet been clarified in detail. Thus, in order to clarify the mechanisms that make Cu in steel improve fatigue properties of steel, dislocation structure and precipitates of Cu added steels under different precipitation conditions have been observed and analyzed with electron microscopy. Consequently, it is clarified that reduction of the cross-slip frequency by Cu solid solution or Cu cluster in steel retards fatigue crack initiation.

本文言語英語
ページ(範囲)49-55
ページ数7
ジャーナルNippon Steel Technical Report
91
出版ステータス出版済み - 1 2005
外部発表はい

All Science Journal Classification (ASJC) codes

  • 材料力学
  • 金属および合金
  • 材料化学

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