抄録
Rotating bending fatigue tests were carried out for Inconel 718 at room temperature to investigate the growth characteristics of a small crack. It was found that : (1) The crack initiated at the grain boundary and then propagated as a transgranular crack. (2) When the stress level was higher than the fatigue limit, the fatigue life was mainly controlled by the growth life of a crack smaller than 1mm. (3) The fatigue limit was a limiting stress for the crack propagation. (4) At low stress levels (σ<SUB>a</SUB>/σ<SUB>0.2</SUB><0.5, σ<SUB>a</SUB> : stress amplitude, σ<SUB>0.2</SUB> : 0.2% proof stress), the crack growth rate was determined by the stress intensity factor range ΔK ; and at high stress levels (σ<SUB>a</SUB>/σ<SUB>0.2</SUB>>0.6), it was determined by the small crack growth law.
| 寄稿の翻訳タイトル | Characteristics of Small Crack Growth in a Nickel-Base Superalloy |
|---|---|
| 本文言語 | 日本語 |
| ページ（範囲） | 1398-1402 |
| ページ数 | 5 |
| ジャーナル | Nihon Kikai Gakkai Ronbunshu, A Hen/Transactions of the Japan Society of Mechanical Engineers, Part A |
| 巻 | 63 |
| 号 | 611 |
| DOI | |
| 出版ステータス | 出版済み - 7月 25 1997 |