{"created":"2023-07-25T10:21:44.001805+00:00","id":849,"links":{},"metadata":{"_buckets":{"deposit":"680afe46-7065-4b61-9672-04337d41cf8d"},"_deposit":{"created_by":15,"id":"849","owners":[15],"pid":{"revision_id":0,"type":"depid","value":"849"},"status":"published"},"_oai":{"id":"oai:air.repo.nii.ac.jp:00000849","sets":["590:664:671:673"]},"author_link":[],"item_10001_biblio_info_7":{"attribute_name":"書誌情報","attribute_value_mlt":[{"bibliographicIssueDates":{"bibliographicIssueDate":"2006-11-01","bibliographicIssueDateType":"Issued"},"bibliographicIssueNumber":"1/2","bibliographicPageEnd":"11","bibliographicPageStart":"7","bibliographicVolumeNumber":"14","bibliographic_titles":[{"bibliographic_title":"International Journal of the Society of Materials Engineering for Resources","bibliographic_titleLang":"en"}]}]},"item_10001_description_5":{"attribute_name":"内容記述","attribute_value_mlt":[{"subitem_description":"The goal of replacing 'conventional' Al alloys with Al-Li alloys to reduce weight of aerospace structures has had only limited success to date, despite one of the largest alloy-development programs ever undertaken. One of the reasons being, for some product forms and crack-plane orientations, fracture toughness is lower compared with conventional Al alloys due to a greater propensity for low-energy intergranular fracture. Proposed explanations for brittle intergranular fracture include: (i) planar slip resultingin high stresses where slip bands impinge on grain-boundaries, (ii) embrittlement due to alkali-metal-impurity phases, and (iii) grain-boundary structural changes associated with segregation of lithium. The present paper reviews evidence for and against these proposed mechanisms based on (i) studies of 8090 and 2090 alloys, and the more recently developed 2297 alloy, and (ii) comparisons of fracture of these alloys with other materials that exhibit grain-boundary weakness. It appears that lithium segregation to grain boundaries is the prime cause of low-energy intergranular fracturein Al-Li alloys. Embrittlement by alkali-metal impurities is not important providing that impurity levels are less than about 5 ppm (as is the case for most commercially produced alloys). Planar slip and other factors probably play only a minor role.","subitem_description_language":"en","subitem_description_type":"Abstract"}]},"item_10001_publisher_8":{"attribute_name":"出版者","attribute_value_mlt":[{"subitem_publisher":"The Society of Materials Engineering for Resources of Japan","subitem_publisher_language":"en"}]},"item_10001_relation_25":{"attribute_name":"関連情報","attribute_value_mlt":[{"subitem_relation_type":"isIdenticalTo","subitem_relation_type_id":{"subitem_relation_type_id_text":"http://doi.org/10.5188/ijsmer.14.7","subitem_relation_type_select":"DOI"}}]},"item_10001_version_type_20":{"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_1724099666130":{"attribute_name":"収録物識別子","attribute_value_mlt":[{"subitem_source_identifier":"1347-9725","subitem_source_identifier_type":"PISSN"},{"subitem_source_identifier":"AA1095475X","subitem_source_identifier_type":"NCID"}]},"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":"作成者","attribute_type":"creator","attribute_value_mlt":[{"creatorNames":[{"creatorName":"Pasang, Timotius","creatorNameLang":"en"}]},{"creatorNames":[{"creatorName":"Lynch, Stan P.","creatorNameLang":"en"}]},{"creatorNames":[{"creatorName":"Moutsos, Stavroula","creatorNameLang":"en"}]}]},"item_files":{"attribute_name":"ファイル情報","attribute_type":"file","attribute_value_mlt":[{"accessrole":"open_date","date":[{"dateType":"Available","dateValue":"2017-02-16"}],"displaytype":"detail","filename":"ijsmer14b.pdf","filesize":[{"value":"1.2 MB"}],"format":"application/pdf","licensetype":"license_note","mimetype":"application/pdf","url":{"label":"ijsmer14b.pdf","url":"https://air.repo.nii.ac.jp/record/849/files/ijsmer14b.pdf"},"version_id":"2e973d8a-3f6b-40e1-8f77-cf9d17cb7835"}]},"item_keyword":{"attribute_name":"キーワード","attribute_value_mlt":[{"subitem_subject":"A1-Li alloys","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"grain boundaries","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"embrittlement","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"segregation","subitem_subject_language":"en","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":"Challenges in Developing High Performance Al-Li Alloys","item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"Challenges in Developing High Performance Al-Li Alloys","subitem_title_language":"en"}]},"item_type_id":"10001","owner":"15","path":["673"],"pubdate":{"attribute_name":"PubDate","attribute_value":"2008-03-07"},"publish_date":"2008-03-07","publish_status":"0","recid":"849","relation_version_is_last":true,"title":["Challenges in Developing High Performance Al-Li Alloys"],"weko_creator_id":"15","weko_shared_id":-1},"updated":"2024-08-25T18:13:08.964737+00:00"}