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Fracture Toughness of an Advanced Ultrahigh-strength TRIP-aided Steel
http://hdl.handle.net/10091/00018769
http://hdl.handle.net/10091/00018769443b31d3-c73a-49d1-bb70-9451456792ff
| 名前 / ファイル | ライセンス | アクション |
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Fracture_Toughness_Advanced_Ultrahigh-strength.pdf (2.8 MB)
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| Item type | 学術雑誌論文 / Journal Article(1) | |||||
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| 公開日 | 2016-04-21 | |||||
| タイトル | ||||||
| タイトル | Fracture Toughness of an Advanced Ultrahigh-strength TRIP-aided Steel | |||||
| 言語 | ||||||
| 言語 | eng | |||||
| DOI | ||||||
| 関連名称 | 10.2355/isijinternational.54.955 | |||||
| キーワード | ||||||
| 主題 | fracture toughness, ultrahigh-strength steel, TRIP-aided steel, microstructure, retained austenite, martensite, bainitic ferrite | |||||
| 資源タイプ | ||||||
| 資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||
| 資源タイプ | journal article | |||||
| 著者 |
Kobayashi, Junya
× Kobayashi, Junya× Ina, Daiki× Futamura, Asahiko× Sugimoto, Koh-ichi |
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| 信州大学研究者総覧へのリンク | ||||||
| 表示名 | Sugimoto, Koh-ichi | |||||
| URL | http://soar-rd.shinshu-u.ac.jp/profile/ja.jCApjekV.html | |||||
| 出版者 | ||||||
| 出版者 | IRON STEEL INST JAPAN KEIDANREN KAIKAN | |||||
| 引用 | ||||||
| 内容記述タイプ | Other | |||||
| 内容記述 | ISIJ INTERNATIONAL. 54(4):955-962 (2014) | |||||
| 書誌情報 |
ISIJ INTERNATIONAL 巻 54, 号 4, p. 955-962, 発行日 2014-06-05 |
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| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | The fracture toughness of an advanced ultrahigh-strength 0.2%C-1.5%Si-1.5%Mn-1.0%Cr-0.05%Nb (in mass%) transformation-induced plasticity (TRIP)-aided steel with a bainitic ferrite and/or martensite structure matrix was investigated for applications in automobiles, construction machines, and pressure vessels. After the steel was austenitized and isothermally transformed via heat treatment at temperatures between 200 degrees C and 350 degrees C below the martensite-finish temperature, it exhibited a good combination of tensile strength (1.4 GPa) and total elongation (15%). In addition, the steel achieved a much higher plane-strain fracture toughness (K-IC = 129-154 MPa m(1/2)) than conventional structural steel such as SCM420 steel (K-IC = 57-63 MPa m(1/2)). Surprisingly, the fracture toughness was nearly the same as that of a maraging steel. Our results indicate that the high fracture toughness was associated with (1) a softened wide lath-martensite matrix with a low carbide content and carbon concentration and (2) effective plastic relaxation of localized stress concentration by the strain-induced transformation of fine metastable retained austenite in the narrow lath-martensite and retained austenite mixture, which suppresses void formation and cleavage crack initiation at the pre-crack tip. | |||||
| 資源タイプ（コンテンツの種類） | ||||||
| 内容記述タイプ | Other | |||||
| 内容記述 | Article | |||||
| ISSN | ||||||
| 収録物識別子タイプ | ISSN | |||||
| 収録物識別子 | 0915-1559 | |||||
| 書誌レコードID | ||||||
| 収録物識別子タイプ | NCID | |||||
| 収録物識別子 | AA10680712 | |||||
| 権利 | ||||||
| 権利情報 | Copyright © 2014 ISIJ | |||||
| 出版タイプ | ||||||
| 出版タイプ | VoR | |||||
| 出版タイプResource | http://purl.org/coar/version/c_970fb48d4fbd8a85 | |||||
| WoS | ||||||
| 表示名 | Web of Science | |||||
| URL | http://gateway.isiknowledge.com/gateway/Gateway.cgi?&GWVersion=2&SrcAuth=ShinshuUniv&SrcApp=ShinshuUniv&DestLinkType=FullRecord&DestApp=WOS&KeyUT=000334824200032 | |||||
