書誌事項
- タイトル別名
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- Estimation of the Effective Grain Size Controlling Brittle Crack Arrest Toughness of High-strength Steel
- コウキョウドコウ ノ ゼイセイ キレツ デンパ テイシ トクセイ オ シハイ スル ユウコウ ケッショウ リュウケイ ノ スイテイ
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<p>It is well known that brittle crack arrest toughness can be improved by grain refinement. The relationship between the fracture surface and the cross-sectional microstructure of the ESSO test pieces by means of EBSD was investigated to clarify the effective grain size of high-strength steel plates. Taking into consideration the fact that a big difference in brittle crack propagation resistance sometimes takes place even if the misorientation between neighboring grains is the same, a new index denoting the propagation resistance referred to crack propagation deviation angle was proposed. The index is defined as an angle between two vectors, which are projected on the ND plane, of the normal vectors of cleavage {100} planes closest to the RD direction of neighboring two grains. It was found that the boundary with the crack propagation deviation angle of 25° or more corresponds to the boundary of the cleavage facet size. The effective grain size evaluated by applying the intercept method on the EBSD data with a high crack propagation deviation angle of the base metal is almost equal to the cleavage facet size. Therefore, the average effective grain size can be estimated without performing any tests to evaluate arrest toughness.</p>
収録刊行物
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- 鉄と鋼
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鉄と鋼 104 (3), 177-185, 2018
一般社団法人 日本鉄鋼協会
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詳細情報 詳細情報について
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- CRID
- 1390001205217090816
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- NII論文ID
- 130006405077
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- NII書誌ID
- AN00151251
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- ISSN
- 18832954
- 00211575
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- NDL書誌ID
- 028876480
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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