Evaluation of fatigue crack propagation in surface modification layer by a load-controlled plate bending fatigue tester
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- TAKAKUWA Osamu
- Department of Nanomechanics, Tohoku University
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- SANADA Kazumasa
- 東北大学大学院
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- SOYAMA Hitoshi
- Department of Nanomechanics, Tohoku University
Bibliographic Information
- Other Title
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- 荷重制御型平面曲げ式疲労試験機による表面改質層における疲労亀裂進展挙動の定量的評価
Abstract
The objective of this study is to evaluate fatigue crack propagating behavior in surface modification layer treated by peening. A load-controlled plate bending fatigue tester has been developed in this study. This makes possible to evaluate relation between stress intensity factor range and fatigue crack growth rate, i.e., da/dN-ΔK diagram, in the surface modification layer, since the tester keeps the load constant differently from a displacement-controlled tester. Although the displacement-controlled fatigue tester which keeps displacement constant has been widely used to evaluate the fatigue crack propagating behavior, an applied load, i.e., stress ratio, changes along with crack propagating. In this study, the fatigue crack propagation test was conducted on specimens treated by cavitation peening, which is one of the surface modification techniques, and mechanical properties were also evaluated, including residual stress, yield stress and Vickers hardness, so as to reveal the effect of such mechanical properties varied by the peeing on the fatigue crack propagating behavior. It was concluded that the da/dN-ΔK diagram determined by the tester follows the Paris law and ΔK at da/dN = 10-9 ~ 10-8 was increased more than twice by cavitation peening. The increment has a relation with the mechanical properties varied by the peening.
Journal
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- Transactions of the JSME (in Japanese)
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Transactions of the JSME (in Japanese) 80 (810), SMM0022-SMM0022, 2014
The Japan Society of Mechanical Engineers
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Details 詳細情報について
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- CRID
- 1390282680491618816
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- NII Article ID
- 130003399130
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- ISSN
- 21879761
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- Text Lang
- ja
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- Data Source
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- JaLC
- Crossref
- CiNii Articles
- KAKEN
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- Abstract License Flag
- Disallowed