{"created":"2021-03-01T06:21:03.392663+00:00","id":18001,"links":{},"metadata":{"_buckets":{"deposit":"5c0af754-7123-4e2e-8907-9b0091f63b40"},"_deposit":{"id":"18001","owners":[],"pid":{"revision_id":0,"type":"depid","value":"18001"},"status":"published"},"_oai":{"id":"oai:soar-ir.repo.nii.ac.jp:00018001","sets":["1221:1222"]},"author_link":["50308","50309","50310","50311"],"item_1628147817048":{"attribute_name":"出版タイプ","attribute_value_mlt":[{"subitem_version_resource":"http://purl.org/coar/version/c_970fb48d4fbd8a85","subitem_version_type":"VoR"}]},"item_6_biblio_info_6":{"attribute_name":"書誌情報","attribute_value_mlt":[{"bibliographicIssueDates":{"bibliographicIssueDate":"2014-06-05","bibliographicIssueDateType":"Issued"},"bibliographicIssueNumber":"4","bibliographicPageEnd":"962","bibliographicPageStart":"955","bibliographicVolumeNumber":"54","bibliographic_titles":[{"bibliographic_title":"ISIJ INTERNATIONAL"}]}]},"item_6_description_20":{"attribute_name":"抄録","attribute_value_mlt":[{"subitem_description":"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.","subitem_description_type":"Abstract"}]},"item_6_description_30":{"attribute_name":"資源タイプ（コンテンツの種類）","attribute_value_mlt":[{"subitem_description":"Article","subitem_description_type":"Other"}]},"item_6_description_5":{"attribute_name":"引用","attribute_value_mlt":[{"subitem_description":"ISIJ INTERNATIONAL. 54(4):955-962 (2014)","subitem_description_type":"Other"}]},"item_6_link_3":{"attribute_name":"信州大学研究者総覧へのリンク","attribute_value_mlt":[{"subitem_link_text":"Sugimoto, Koh-ichi","subitem_link_url":"http://soar-rd.shinshu-u.ac.jp/profile/ja.jCApjekV.html"}]},"item_6_link_67":{"attribute_name":"WoS","attribute_value_mlt":[{"subitem_link_text":"Web of Science","subitem_link_url":"http://gateway.isiknowledge.com/gateway/Gateway.cgi?&GWVersion=2&SrcAuth=ShinshuUniv&SrcApp=ShinshuUniv&DestLinkType=FullRecord&DestApp=WOS&KeyUT=000334824200032"}]},"item_6_publisher_4":{"attribute_name":"出版者","attribute_value_mlt":[{"subitem_publisher":"IRON STEEL INST JAPAN KEIDANREN KAIKAN"}]},"item_6_relation_48":{"attribute_name":"DOI","attribute_value_mlt":[{"subitem_relation_name":[{"subitem_relation_name_text":"10.2355/isijinternational.54.955"}],"subitem_relation_type_id":{"subitem_relation_type_id_text":"https://doi.org/10.2355/isijinternational.54.955","subitem_relation_type_select":"DOI"}}]},"item_6_rights_62":{"attribute_name":"権利","attribute_value_mlt":[{"subitem_rights":"Copyright © 2014 ISIJ"}]},"item_6_source_id_35":{"attribute_name":"ISSN","attribute_value_mlt":[{"subitem_source_identifier":"0915-1559","subitem_source_identifier_type":"ISSN"}]},"item_6_source_id_40":{"attribute_name":"書誌レコードID","attribute_value_mlt":[{"subitem_source_identifier":"AA10680712","subitem_source_identifier_type":"NCID"}]},"item_creator":{"attribute_name":"著者","attribute_type":"creator","attribute_value_mlt":[{"creatorNames":[{"creatorName":"Kobayashi,  Junya"}],"nameIdentifiers":[{"nameIdentifier":"50308","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Ina,  Daiki"}],"nameIdentifiers":[{"nameIdentifier":"50309","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Futamura,  Asahiko"}],"nameIdentifiers":[{"nameIdentifier":"50310","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Sugimoto,  Koh-ichi"}],"nameIdentifiers":[{"nameIdentifier":"50311","nameIdentifierScheme":"WEKO"}]}]},"item_files":{"attribute_name":"ファイル情報","attribute_type":"file","attribute_value_mlt":[{"accessrole":"open_date","date":[{"dateType":"Available","dateValue":"2016-04-21"}],"displaytype":"detail","filename":"Fracture_Toughness_Advanced_Ultrahigh-strength.pdf","filesize":[{"value":"2.8 MB"}],"format":"application/pdf","licensetype":"license_note","mimetype":"application/pdf","url":{"label":"Fracture_Toughness_Advanced_Ultrahigh-strength.pdf","url":"https://soar-ir.repo.nii.ac.jp/record/18001/files/Fracture_Toughness_Advanced_Ultrahigh-strength.pdf"},"version_id":"1b009064-9057-45d7-b2da-78435ca030d3"}]},"item_keyword":{"attribute_name":"キーワード","attribute_value_mlt":[{"subitem_subject":"fracture toughness","subitem_subject_scheme":"Other"},{"subitem_subject":"ultrahigh-strength steel","subitem_subject_scheme":"Other"},{"subitem_subject":"TRIP-aided steel","subitem_subject_scheme":"Other"},{"subitem_subject":"microstructure","subitem_subject_scheme":"Other"},{"subitem_subject":"retained austenite","subitem_subject_scheme":"Other"},{"subitem_subject":"martensite","subitem_subject_scheme":"Other"},{"subitem_subject":"bainitic ferrite","subitem_subject_scheme":"Other"}]},"item_language":{"attribute_name":"言語","attribute_value_mlt":[{"subitem_language":"eng"}]},"item_resource_type":{"attribute_name":"資源タイプ","attribute_value_mlt":[{"resourcetype":"journal article","resourceuri":"http://purl.org/coar/resource_type/c_6501"}]},"item_title":"Fracture Toughness of an Advanced Ultrahigh-strength TRIP-aided Steel","item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"Fracture Toughness of an Advanced Ultrahigh-strength TRIP-aided Steel","subitem_title_language":"en"}]},"item_type_id":"6","owner":"1","path":["1222"],"pubdate":{"attribute_name":"PubDate","attribute_value":"2016-04-21"},"publish_date":"2016-04-21","publish_status":"0","recid":"18001","relation_version_is_last":true,"title":["Fracture Toughness of an Advanced Ultrahigh-strength TRIP-aided Steel"],"weko_creator_id":"1","weko_shared_id":-1},"updated":"2022-12-14T04:12:32.901958+00:00"}