Effect of Loading Frequency on Fatigue Strength of Ni-Based Super Alloy
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- KAWAGOISHI Norio
- Department of Mechanical Engineering, Faculty of Engineering, Kagoshima University
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- OGAWA Jun
- 鹿児島大学大学院理工学研究科
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- CHEN Qiang
- 高知工業高等専門学校機械工科
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- GOTO Masahiro
- 大分大学工学部
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- MORINO Kazuhiro
- 徳山工業高等専門学校機械制御工学科
Bibliographic Information
- Other Title
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- Ni基超合金の疲労強度に及ぼす繰返し速度の影響
- 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
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Abstract
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.
Journal
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- TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series A
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TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series A 72 (722), 1542-1549, 2006
The Japan Society of Mechanical Engineers
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Keywords
Details 詳細情報について
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- CRID
- 1390282679454300416
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- NII Article ID
- 110004837525
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- NII Book ID
- AN0018742X
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- COI
- 1:CAS:528:DC%2BD2sXitVSntg%3D%3D
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- ISSN
- 18848338
- 03875008
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- HANDLE
- 10559/7087
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- NDL BIB ID
- 8556311
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- Text Lang
- ja
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- Data Source
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- JaLC
- IRDB
- NDL
- Crossref
- CiNii Articles
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- Abstract License Flag
- Disallowed