{"created":"2023-06-19T12:07:13.857747+00:00","id":13147,"links":{},"metadata":{"_buckets":{"deposit":"5de2572f-b2dc-4423-8087-8fd4c571e432"},"_deposit":{"created_by":17,"id":"13147","owners":[17],"pid":{"revision_id":0,"type":"depid","value":"13147"},"status":"published"},"_oai":{"id":"oai:kokushikan.repo.nii.ac.jp:00013147","sets":["1:865","876:1059"]},"author_link":["20601"],"control_number":"13147","item_10006_alternative_title_22":{"attribute_name":"その他(別言語等)のタイトル","attribute_value_mlt":[{"subitem_alternative_title":"摩擦攪拌プロセスによるZn-22Al超塑性合金の革新的機能の創成","subitem_alternative_title_language":"ja"}]},"item_10006_date_granted_40":{"attribute_name":"学位授与年月日","attribute_value_mlt":[{"subitem_dategranted":"2018-03-20"}]},"item_10006_degree_grantor_38":{"attribute_name":"学位授与機関","attribute_value_mlt":[{"subitem_degreegrantor":[{"subitem_degreegrantor_name":"国士舘大学"}],"subitem_degreegrantor_identifier":[{"subitem_degreegrantor_identifier_name":"32616","subitem_degreegrantor_identifier_scheme":"kakenhi"}]}]},"item_10006_degree_name_37":{"attribute_name":"学位名","attribute_value_mlt":[{"subitem_degreename":"博士 (工学)"}]},"item_10006_description_26":{"attribute_name":"著者ID","attribute_value_mlt":[{"subitem_description":"J-GLOBAL ID : 201801016373837352","subitem_description_type":"Other"}]},"item_10006_description_34":{"attribute_name":"抄録","attribute_value_mlt":[{"subitem_description":"This dissertation is a systematic study on the developments of innovative functions for Zn-22Al superplastic alloy through friction stir processing (FSP), which is a type of friction stir welding (FSW).\nSuperplastic materials are fine-grained polycrystalline solids that have recently gathered interest because of their excellent tensile elongation and behavior in superplastic forming (SPF) technology. SPF is a forming method that produces complex shaped parts in a single forming process. The grain size, which is one of the most important superplastic parameters, affects the strain rate and ductility in grain boundary sliding (GBS). In GBS, a smaller grain size leads to a larger grain boundary area that results in higher elongation and therefore more favorable superplastic behavior.\nIn the present study, we concentrated on Zn-22Al, a commercial superplastic alloy having a wide range of applications in different fields of studies. Zn-22Al has a seismic property, which makes it applicable in buildings for energy absorption during earthquakes. Zn-22Al is also used for electronic enclosures, cabinets and panels, business machine parts, and medical and other laboratory tools. Zn-22Al has the characteristic of reaching its highest superplasticity at a relevantly lower temperature comparing other conventional superplastic alloys and can be used for superplastic forming and diffusion bonding purposes. However, applications of Zn-22Al receive some limitation especially in structural industries such as easily deformation under constant pressure due to its high strain rate sensitivity. Therefore, methods of improving mechanical properties of Zn-22Al, also developing new techniques for manufacturing new composites of this alloy would become essential.\nThe FSP technique, which is a relatively new processing method requiring fewer processing parameters, was used in the present study to refine the grain structure and improve the mechanical and superplastic properties of Zn-22Al. The results revealed FSP can achieve fine grains and improve the superplastic properties of Zn-22Al.\nIn addition, FSP was used for a novel forming method, known as friction stir forming (FSF), to produce multi-functional superplastic composites. By using the FSF technique, perforated steel sheet was mechanically interlocked between Zn-22Al sheets to produce a superplastic damping sheet with outstanding damping capacity. Moreover, insulated copper wire was mechanically interlocked within Zn-22Al alloy to produce a multi-functional superplastic alloy with the ability to transfer information or energy.\nFinally, FSF can improve the mechanical properties of Zn-22Al superplastic alloy by interlocking the stainless steel strands within the alloy. Using the friction stir based technique can have a significant scientific impact on the production of functional composites with respect to both mechanical engineering and electrical engineering.","subitem_description_type":"Abstract"}]},"item_10006_description_39":{"attribute_name":"学位授与年度","attribute_value_mlt":[{"subitem_description":"平成29年度","subitem_description_type":"Other"}]},"item_10006_description_53":{"attribute_name":"フォーマット","attribute_value_mlt":[{"subitem_description":"application/pdf","subitem_description_type":"Other"}]},"item_10006_dissertation_number_42":{"attribute_name":"学位授与番号","attribute_value_mlt":[{"subitem_dissertationnumber":"甲第46号"}]},"item_10006_subject_50":{"attribute_name":"NDC","attribute_value_mlt":[{"subitem_subject":"563.8","subitem_subject_scheme":"NDC"},{"subitem_subject":"566.6","subitem_subject_scheme":"NDC"}]},"item_10006_text_33":{"attribute_name":"発表年月日","attribute_value_mlt":[{"subitem_text_value":"2018-03-20"}]},"item_10006_text_41":{"attribute_name":"報告番号","attribute_value_mlt":[{"subitem_text_value":"甲第46号"}]},"item_10006_textarea_57":{"attribute_name":"キーワード","attribute_value_mlt":[{"subitem_textarea_value":"FSP | Friction Stir Processing | Zn-22Al | multi-functional superplastic composites | 超塑性合金 | 亜鉛合金 | アルミニウム含有合金"}]},"item_10006_version_type_54":{"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":[{"creatorNames":[{"creatorName":"Mofidi Tabatabaei, Hamed","creatorNameLang":"en"}],"nameIdentifiers":[{}]}]},"item_files":{"attribute_name":"ファイル情報","attribute_type":"file","attribute_value_mlt":[{"accessrole":"open_date","date":[{"dateType":"Available","dateValue":"2018-06-26"}],"displaytype":"detail","filename":"kdoc_k_00046_01.pdf","filesize":[{"value":"7.5 MB"}],"format":"application/pdf","licensetype":"license_note","mimetype":"application/pdf","url":{"label":"本文","objectType":"fulltext","url":"https://kokushikan.repo.nii.ac.jp/record/13147/files/kdoc_k_00046_01.pdf"},"version_id":"5204afc3-a86e-442e-b85c-854a61861b95"},{"accessrole":"open_date","date":[{"dateType":"Available","dateValue":"2018-06-26"}],"displaytype":"detail","filename":"kdoc_k_00046_02.pdf","filesize":[{"value":"316.3 kB"}],"format":"application/pdf","licensetype":"license_note","mimetype":"application/pdf","url":{"label":"内容の要旨及び論文審査の結果の要旨","objectType":"abstract","url":"https://kokushikan.repo.nii.ac.jp/record/13147/files/kdoc_k_00046_02.pdf"},"version_id":"91ddb4e2-2e34-4fdc-b832-594f65d9321d"}]},"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":"doctoral thesis","resourceuri":"http://purl.org/coar/resource_type/c_db06"}]},"item_title":"Creation of Innovative Functions for Zn-22Al Superplastic Alloy through Friction Stir Processing","item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"Creation of Innovative Functions for Zn-22Al Superplastic Alloy through Friction Stir Processing","subitem_title_language":"en"}]},"item_type_id":"10006","owner":"17","path":["1059","865"],"pubdate":{"attribute_name":"PubDate","attribute_value":"2018-06-26"},"publish_date":"2018-06-26","publish_status":"0","recid":"13147","relation_version_is_last":true,"title":["Creation of Innovative Functions for Zn-22Al Superplastic Alloy through Friction Stir Processing"],"weko_creator_id":"17","weko_shared_id":-1},"updated":"2024-04-02T01:25:26.669732+00:00"}