Ｎｉ基超合金の疲労強度に及ぼす繰返し速度の影響

DOI 機関リポジトリ HANDLE Web Site Web Site 被引用文献3件 参考文献27件 オープンアクセス

書誌事項

タイトル別名
  • Effect of Loading Frequency on Fatigue Strength of Ni-Based Super Alloy
  • Niキ チョウゴウキン ノ ヒロウ キョウド ニ オヨボス クリカエシ ソクド ノ エイキョウ

この論文をさがす

抄録

In order to investigate the growth mechanism of a fatigue crack of Ni-based super alloy at ultrasonic frequency, ultrasonic fatigue and rotting bending fatigue tests were carried out for Inconel 718 in ambient air and in N2 gas using plain and notched specimens and the results in both tests were compared by focusing on the effects of strain rate and environment. In ambient air, fatigue strength was higher in ultrasonic fatigue than in rotating bending fatigue in plain specimen, while the results in notched specimen were the reverse. Many transgranular cracks and cleavage like cracks were observed on the fracture surface in ultrasonic fatigue in addition to striation and transgranular facets observed in rotating bending fatigue and there was no difference in the fracture mechanism between plain specimen and notched one. Moreover, these effects of frequency on the growth mechanism of a crack in ambient air were nearly the same in N2 gas, though fatigue strength in N2 gas was higher than that in air. The increase in fatigue strength in N2 gas was mainly caused by the retardation of a crack initiation.

収録刊行物

被引用文献 (3)*注記

もっと見る

参考文献 (27)*注記

もっと見る

キーワード

詳細情報 詳細情報について

問題の指摘

ページトップへ