OS1532 S45C焼入れ焼戻し材を用いた欠陥形状が疲労き裂の停留挙動に及ぼす影響の検討

Translated title of the contribution: OS1532 Effect of the Defect Shape on the Fatigue Crack Non-Propagation behavior Using Quenched and Tempered 0.45% Carbon Steel

濱野 泰明, 財前 賢吾, 松枝 剛広, 坂本 惇司, 濱田 繁, 野口 博司

Research output: Contribution to journalArticle

Abstract

A small artificial hole is regarded as a pre-crack and square root area parameter is considered as one of the most important parameter for the fatigue limit of materials which contain small defects. In this study, introducing a sharp notch by using focused ion beam (FIB) or a small artificial hole which have the same area on the quenched and tempered 0.45% carbon steel specimen, we carried out these specimens fatigue tests and we investigated the difference of the two defect shape in the hard material. From the fatigue tests, we obtained two important results. First, the fatigue limit of the specimen with the small artificial hole was higher than the specimen with the FIBed notch. Second, fatigue crack initiation and propagation behavior was different between the two types of the specimens. Usually, there are no differences for annealed steel in the two defect shapes. Therefore, the hardness may affect the fatigue crack behavior of the two defect shapes.
Translated title of the contributionOS1532 Effect of the Defect Shape on the Fatigue Crack Non-Propagation behavior Using Quenched and Tempered 0.45% Carbon Steel
Original languageJapanese
Pages (from-to)_OS1532-1_-_OS1532-3_
JournalM&M材料力学カンファレンス
Volume2013
Issue number0
DOIs
Publication statusPublished - 2013

Fingerprint Dive into the research topics of 'OS1532 Effect of the Defect Shape on the Fatigue Crack Non-Propagation behavior Using Quenched and Tempered 0.45% Carbon Steel'. Together they form a unique fingerprint.

  • Cite this