{"created":"2023-06-19T10:26:32.826398+00:00","id":5139,"links":{},"metadata":{"_buckets":{"deposit":"e96f45f9-9739-4316-94df-98b48a9bb27b"},"_deposit":{"created_by":18,"id":"5139","owners":[18],"pid":{"revision_id":0,"type":"depid","value":"5139"},"status":"published"},"_oai":{"id":"oai:muroran-it.repo.nii.ac.jp:00005139","sets":["41:227"]},"author_link":["53675"],"item_81_date_granted_17":{"attribute_name":"学位授与年月日","attribute_value_mlt":[{"subitem_dategranted":"2015-03-23"}]},"item_81_degree_grantor_10":{"attribute_name":"学位授与機関","attribute_value_mlt":[{"subitem_degreegrantor":[{"subitem_degreegrantor_language":"ja","subitem_degreegrantor_name":"室蘭工業大学"},{"subitem_degreegrantor_language":"en","subitem_degreegrantor_name":"Muroran Institute of Technology"}],"subitem_degreegrantor_identifier":[{"subitem_degreegrantor_identifier_name":"10103","subitem_degreegrantor_identifier_scheme":"kakenhi"}]}]},"item_81_degree_name_11":{"attribute_name":"学位名","attribute_value_mlt":[{"subitem_degreename":"博士（工学）","subitem_degreename_language":"ja"}]},"item_81_description_25":{"attribute_name":"フォーマット","attribute_value_mlt":[{"subitem_description":"application/pdf","subitem_description_type":"Other"}]},"item_81_description_7":{"attribute_name":"抄録","attribute_value_mlt":[{"subitem_description":"In this study, the spheroidal graphite cast iron is widely used for automobile parts and the object to be focused on sphering agent containing rare earth (RE) used for its quality. And produced spheroidal graphite cast iron content RE was adjusted, it is possible to clarify the effect on the fatigue strength, it is considered to reduce possible RE content. In 1st chapter, I describe the relationship between the mechanical properties and the RE of spheroidal graphite cast iron. In 2nd chapter, RE2% and RE0% of the nodularizer is produced spheroidal graphite cast iron of the smooth specimens, and subjected to plane bending fatigue test. As a result, compared to the fatigue strength and RE2% of the specimens in RE0% of the specimen smooth material is reduced 13%. The results of evaluation of the casting defects, the fatigue strength is decreased by casting defects inside of the ⊿K>⊿Kth a smooth material. In 3rd chapter is to use the RE0% and RE2% of nodularizer, FDI the base structure of ferrite land, pearlite area ratio of 30% of the PDI (30), and the fatigue strength in spheroidal graphite cast iron, which was perlite land of PDI was investigated. As a result, the RE0% of the test piece, 10% FDI, 13% in the PDI (30), 23% fatigue strength at PDI decreased. The results of the observation of the fracture surface in each organization, but casting defect that becomes the ⊿K>⊿Kth has been confirmed． In 4th chapter, the RE content in the nodularizer 0%, 0.3%, and produced a spheroidal graphite cast iron was adjusted 0.5%, 2.0% and by making the plane bending fatigue test, can reduce RE content I was examined. RE0.3%, about 8% fatigue strength is lowered by RE0% of the specimen by comparing 0.5%, and 2.0%. As a result of quantitatively evaluating the casting defects were observed in the fracture surface, the value of ⊿K/⊿Kth 0.3% is assumed to be possible to reduce the RE content of 0.5%, since it was reduced to 2.0% to 0.3% that. Since the graphite grains number in RE0% of the specimens is equal less than 300 number/mm2 is chill critical particle count, the inflation pressure by crystallization of graphite is reduced, is suggested that the increased casting defects. In 5th chapter is summary, I have summarized the results of this study.","subitem_description_language":"ja","subitem_description_type":"Abstract"}]},"item_81_dissertation_number_13":{"attribute_name":"学位授与番号","attribute_value_mlt":[{"subitem_dissertationnumber":"甲第374号"}]},"item_81_identifier_registration":{"attribute_name":"ID登録","attribute_value_mlt":[{"subitem_identifier_reg_text":"10.15118/00005130","subitem_identifier_reg_type":"JaLC"}]},"item_81_subject_9":{"attribute_name":"日本十進分類法","attribute_value_mlt":[{"subitem_subject":"566","subitem_subject_scheme":"NDC"}]},"item_81_text_12":{"attribute_name":"学位の種別","attribute_value_mlt":[{"subitem_text_language":"ja","subitem_text_value":"課程博士"}]},"item_81_text_14":{"attribute_name":"報告番号","attribute_value_mlt":[{"subitem_text_language":"ja","subitem_text_value":"甲第374号"}]},"item_81_text_15":{"attribute_name":"学位記番号","attribute_value_mlt":[{"subitem_text_language":"ja","subitem_text_value":"博甲第374号"}]},"item_81_version_type_24":{"attribute_name":"著者版フラグ","attribute_value_mlt":[{"subitem_version_resource":"http://purl.org/coar/version/c_970fb48d4fbd8a85","subitem_version_type":"VoR"}]},"item_access_right":{"attribute_name":"アクセス権","attribute_value_mlt":[{"subitem_access_right":"open access","subitem_access_right_uri":"http://purl.org/coar/access_right/c_abf2"}]},"item_creator":{"attribute_name":"著者","attribute_type":"creator","attribute_value_mlt":[{"creatorAffiliations":[{"affiliationNameIdentifiers":[],"affiliationNames":[{"affiliationName":""}]}],"creatorNames":[{"creatorName":"船曳, 崇史","creatorNameLang":"ja"},{"creatorName":"FUNABIKI, Takafumi","creatorNameLang":"en"},{"creatorName":"フナビキ, タカフミ","creatorNameLang":"ja-Kana"}],"familyNames":[{},{},{}],"givenNames":[{},{},{}],"nameIdentifiers":[{}]}]},"item_files":{"attribute_name":"ファイル情報","attribute_type":"file","attribute_value_mlt":[{"accessrole":"open_date","date":[{"dateType":"Available","dateValue":"2016-02-15"}],"displaytype":"detail","filename":"A374.pdf","filesize":[{"value":"2.7 MB"}],"format":"application/pdf","licensetype":"license_note","mimetype":"application/pdf","url":{"label":"A374","objectType":"fulltext","url":"https://muroran-it.repo.nii.ac.jp/record/5139/files/A374.pdf"},"version_id":"2d70faea-cf64-4fcf-9c95-318161e9b624"},{"accessrole":"open_date","date":[{"dateType":"Available","dateValue":"2016-02-15"}],"displaytype":"detail","filename":"A374_summary.pdf","filesize":[{"value":"480.8 kB"}],"format":"application/pdf","licensetype":"license_note","mimetype":"application/pdf","url":{"label":"A374_summary","objectType":"abstract","url":"https://muroran-it.repo.nii.ac.jp/record/5139/files/A374_summary.pdf"},"version_id":"cae3940a-190c-416f-82ac-0941b6ae7c65"}]},"item_language":{"attribute_name":"言語","attribute_value_mlt":[{"subitem_language":"jpn"}]},"item_resource_type":{"attribute_name":"資源タイプ","attribute_value_mlt":[{"resourcetype":"doctoral thesis","resourceuri":"http://purl.org/coar/resource_type/c_db06"}]},"item_title":"レアアースレス球状黒鉛鋳鉄の疲労強度に関する研究","item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"レアアースレス球状黒鉛鋳鉄の疲労強度に関する研究","subitem_title_language":"ja"}]},"item_type_id":"81","owner":"18","path":["227"],"pubdate":{"attribute_name":"PubDate","attribute_value":"2015-06-11"},"publish_date":"2015-06-11","publish_status":"0","recid":"5139","relation_version_is_last":true,"title":["レアアースレス球状黒鉛鋳鉄の疲労強度に関する研究"],"weko_creator_id":"18","weko_shared_id":-1},"updated":"2023-11-13T01:36:22.417845+00:00"}