Effect of Material Hardness on Crack Size Rendered Harmless by Shot Peening
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- HOUJOU Keiji
- Dept. of Mech. Eng., Oyama Nat. College of Tech.
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- TAKAHASHI Koji
- Faculty of Engineering, Yokohama N. U.
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- ANDO Kotoji
- Faculty of Engineering, Yokohama N. U.
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- FUEKI Ryutaro
- Faculty of Engineering, Yokohama N. U.
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- OKADA Hideki
- NHK Spring Co., Ltd.
Bibliographic Information
- Other Title
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- ショットピーニングによる表面き裂の無害化寸法に与える材料硬さの影響
- ショットピーニング ニ ヨル ヒョウメン キレツ ノ ムガイカ スンポウ ニ アタエル ザイリョウ カタサ ノ エイキョウ
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Abstract
The effects of material hardness on the maximum size of a slit, which was rendered harmless by shot peening, were investigated. Specimens of two types of hardness were made of spring steel (SUP9), and a semi-circular slit was introduced by using an end mill. After the shot-peening process, bending fatigue tests with a stress ratio of R = 0.05 were carried out in air. The maximum depth of slit rendered harmless by shot peening for 270 HV and 350 HV were α0p = 0.2 and 0.3 mm, respectively. Considering the experimental results of the present and previous works, the hardness did not have a large influence on the size of α0p. In order to predict the size of α0p, the range of the stress intensity factors at the semi-circular crack caused by the residual stress and applied stress during the fatigue test were analyzed. The calculated result corresponded well with the experimental result.
Journal
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- Journal of the Society of Materials Science, Japan
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Journal of the Society of Materials Science, Japan 64 (11), 859-864, 2015
The Society of Materials Science, Japan
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Keywords
Details 詳細情報について
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- CRID
- 1390282680421787904
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- NII Article ID
- 130005109747
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- NII Book ID
- AN00096175
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- ISSN
- 18807488
- 05145163
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- NDL BIB ID
- 026945888
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- Text Lang
- ja
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- Data Source
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- JaLC
- NDL
- Crossref
- CiNii Articles
- KAKEN
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- Abstract License Flag
- Disallowed