書誌事項
- タイトル別名
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- OS0109 Strengthening and Toughening of Fail-safe Materials : 1^<st> Report, Impact toughness of a 800 MPa class low-carbon steel
抄録
Bulk ultrafine-grained (UFG) low carbon steel bars were produced by warm caliber rolling, and the impact and tensile properties were investigated. The microstructures in the rolled bars consisted of an elongated UFG structure with a strong α-fiber texture. The rolled bar consisting of spheroidal cementite particles that distributed uniformly in the elongated ferrite matrix of transverse grain size of 0.8-1.0μm exhibited superior strength-ductility balance and impact properties. In the rolled bars, cracks during an impact test branched parallel to the longitudinal direction of the test samples as temperatures decreased. Delamination caused by such crack branching remarkably appeared near the ductile-to-brittle transition temperature. In conclusion, the strength-toughness balance is improved by refining crystal grains and controlling their shape and orientation; in addition, delamination effectively enhances the low-temperature toughness.
収録刊行物
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- M&M材料力学カンファレンス
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M&M材料力学カンファレンス 2012 (0), _OS0109-1_-_OS0109-3_, 2012
一般社団法人 日本機械学会
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詳細情報 詳細情報について
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- CRID
- 1390282680849600128
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- NII論文ID
- 110009937235
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- ISSN
- 24242845
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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
- Crossref
- CiNii Articles
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- 抄録ライセンスフラグ
- 使用不可