書誌事項
- タイトル別名
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- Very High Cycle Fatigue Properties and Fracture Types of Ti-6Al-4V Alloy
- Ti 6Al 4V ゴウキン ノ チョウコウサイクル ヒロウ トクセイ ト ハカイ ケイタイ
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説明
To investigate the fatigue characteristics and the fracture feature of Ti-6Al-4V in very high cycle region, uniaxial tension fatigue tests were carried out. The S-N diagram showed a complex folding shape, which corresponded to the locations of the fracture origins; i. e., surface-originating fractures in high stress level and interior-originating fractures in low stress level. In this study, observed also were interference type fractures in which the main crack was formed by the coalescence of a surface-originating crack and interior-originating cracks in low stress level. Interference type fractures occurred in shorter life region than interior-originating fractures. Therefore, it is inappropriate and risky to evaluate a fatigue life in low stress level without consideration of interference type fractures. When characteristics of this type of material are investigated, it is important to make a model in consideration of distribution of crack initiation sites. A clear difference was observed on the fracture surfaces of structure sensitive stage 2a regions between the surface-originating fracture and the interior-originating fracture. The initial interior crack propagation is characterized by unclear slip marks and a generally round ductile feature with aggregation of a few micro-meter size granular substances. This tendency was not observed on the surface cracks. This seemed to result from the different surrounding environments of surface and interior cracks. Synergistic effects of a vacuum-like environment inside of material and compressive load may cause forming of granular substances.
収録刊行物
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- 材料
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材料 52 (11), 1298-1304, 2003
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
- 1390282680396518272
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- NII論文ID
- 110002302034
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- NII書誌ID
- AN00096175
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- COI
- 1:CAS:528:DC%2BD3sXpvVKhtbc%3D
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- ISSN
- 18807488
- 05145163
- http://id.crossref.org/issn/05145163
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- NDL書誌ID
- 6769242
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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