書誌事項
- タイトル別名
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- Development of Microstructurally Small Fatigue Crack Initiation and Growth Evaluation Method Using Automatic <i>In-situ</i> Observation System with Digital Image Correlation Technique
- ジドウ ソノ バ カンサツ システム ト ガゾウ ソウカンホウ オ モチイタ ビシ ソシキテキ ビショウ ヒロウ キレツ ハッセイ オヨビ シンテン ヒョウカホウ ノ カイハツ
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抄録
<p>We constructed an automatic in situ fatigue observation system to monitor small fatigue crack behavior at the microstructural level. Applying a digital image correlation (DIC) technique in combination enabled us to continuously and automatically track and record microscopic deformation behavior. To verify the effectiveness of this system, we applied it to small fatigue crack evaluation in heat-treated low-carbon steel. The results demonstrated the feasibility, using our developed system, of automatically tracking and recording microstructurally small fatigue crack initiation and early growth behavior. By utilizing DIC analysis, we also succeeded in visualizing microscopic deformations such as inhomogeneous strain concentration by microstructures causing fatigue cracks and small fatigue crack opening-closing behavior. Although early stage fatigue crack growth rate accelerated compared to long crack data, it was consistent with long crack data by using ΔKeff calculated from crack open stress measured by DIC.</p>
収録刊行物
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- 鉄と鋼
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鉄と鋼 105 (1), 105-111, 2019
一般社団法人 日本鉄鋼協会
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詳細情報
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- CRID
- 1390001288104891648
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- NII論文ID
- 130007599132
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- NII書誌ID
- AN00151251
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- ISSN
- 18832954
- 00211575
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- NDL書誌ID
- 029432825
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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