書誌事項
- タイトル別名
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- Effects of Artificial Small Defect and Corrosive Environment on Torsional Fatigue Strength of High Strength Spring Steel
- コウキョウド バネコウ ノ ネジリ ヒロウ キョウド ニ オヨボス ビショウ ケッカン オヨビ フショク カンキョウ ノ エイキョウ
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Torsional fatigue tests were conducted for spring steels whose Vickers hardness were 430, 480, 550, and 620. The effects of corrosive environment and surface artificial pits on the fatigue strength were studied. The fatigue strength of smooth specimens was maximum at 550HV for fatigue in air and 480HV for corrosion fatigue. Intergranular fracture surfaces were observed on the fatigue fracture surface corresponded to the decrease in the fatigue strength of the high-hardness materials. The fatigue fracture of smooth specimens was generated from shear crack for fatigue in air and from corrosion pit in corrosion fatigue. The stress intensity factor for crack initiation from corrosion pit was nearly the same for all materials. The fatigue strength reduction factor was constant under fatigue loading in air, while decreased with increasing fatigue life and hardness in corrosion fatigue. For the case of long of the material with 620HV in corrosive environment, a significant influence of the artificial pit on the fatigue strength was not seen. Many small cracks were observed at the sites except for artificial pit on the surface of the 620HV specimens fatigued at low stress levels.
収録刊行物
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- 材料
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材料 56 (12), 1096-1102, 2007
公益社団法人 日本材料学会
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詳細情報 詳細情報について
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- CRID
- 1390282680396367232
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- NII論文ID
- 130002085914
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- NII書誌ID
- AN00096175
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- ISSN
- 18807488
- 05145163
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- NDL書誌ID
- 9309781
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- 本文言語コード
- ja
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- データソース種別
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- 抄録ライセンスフラグ
- 使用不可