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船引 雄太*; 伊與田 宗慶*; 菖蒲 敬久; 松田 朋己*; 林 雄二郎*; 佐野 智一*; 他8名*
Journal of Manufacturing Processes, 115, p.40 - 55, 2024/04
被引用回数：12 パーセンタイル：82.25(Engineering, Manufacturing)In resistance spot welding (RSW) of Fe and Al alloy, an intermetallic compound (IMC) is formed at the joining interface, and it is known that the joining strength of the joint decreases as the IMC becomes thicker. In this study, the convection behavior in the Al alloy melting zone of an Fe-Al alloy RSW was varied and the effect on the joint characteristics was investigated. For this study, focusing on the electromagnetic force generated in the Al alloy melting zone, the convection behavior in the Al alloy melting zone was changed by adding an external magnetic field using neodymium magnets. In-situ evaluation of the convection behavior using synchrotron radiation and cross-sectional macro-observation of the joint revealed that the addition of an external magnetic field causes a non-axisymmetric change in the convection behavior in the Al alloy melting zone, which results in the deflection of the Al alloy melting zone. The addition of an external magnetic field increases the driving force of convection and homogenizes the temperature field at the joining interface, suggesting that the IMC near the center is formed thin and uniform. Furthermore, from the cross tension test and the observation of the fracture surface of the joint after the test, it was clarified that the CTS of the joint with an external magnetic field was improved by the propagation of cracks into the Al alloy melting zone during the test.
坂村 義治*; 白井 理; 岩井 孝; 鈴木 康文
Journal of Alloys and Compounds, 321(1), p.76 - 83, 2001/05
被引用回数：60 パーセンタイル：88.99(Chemistry, Physical)金属あるいは窒化物などの新型燃料の乾式再処理ではLiCl-KCl/液体Cd系での分配挙動を利用した各元素の分離・回収やLiCl-CKl共晶塩中での電解による各元素の分離・回収が考えられている。特にLiCl/KCl共晶塩/Cd系でのPu等の分配挙動の基礎的な理解は重要である。本研究では、PuとAmのLiCl-KCl共晶塩/液体Cd系での分配挙動を、平衡電位との関係を調べながら明らかにした。特に、Amは塩中で、-1.45V以上では3価,-1.45V以下では2価で存在することが判明した。
中島 甫; 横山 憲夫; 野村 茂雄*; 上野 文義*; 藤田 充苗*; 栗原 豊*; 岩田 修一*
Journal of Nuclear Materials, 191-194, p.1046 - 1050, 1992/00
被引用回数：4 パーセンタイル：41.46(Materials Science, Multidisciplinary)原子力用材料開発のブレークスルーを目指した基盤研究が実施されており、これらの成果を多くの材料研究者が相互に利用することが望まれている。このため、金材技研及び動燃事業団と共同して、データフリーウェイと呼ぶ分散型材料データベースの構築を平成2年度より進めている。本報では、データベースの統合方法、データ構造の特徴等システムの基本設計の現状を述べるとともに、核融合炉材料に焦点を合せて当該システムを利用することにより可能となる課題について言及する。さらに、今後のシステム整備計画についても紹介する。
Harjo, S.; 川崎 卓郎; Gong, W.; Mao, W.
no journal, ,
Applications in aerospace, linear motors, and other fields have created a need for superior structural materials at cryogenic temperatures. In response, it has become necessary not only to develop structural materials with excellent mechanical properties at cryogenic temperatures, but also to investigate the cryogenic deformation mechanism of such materials. Therefore, it is necessary to develop a method to observe microstructures including the phase stresses during cryogenic deformation. To answer this question, we have developed a cryogenic horizontal deformation tester and an in-situ measurement method during cryogenic deformation on the neutron diffractometer TAKUMI installed at the high intensity pulsed neutron facility, J-PARC. We have also already obtained several excellent results from the in situ measurements during cryogenic deformation, which will be presented in this presentation.
