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International Affairs Students Current Students Alumni Faculty/Staff Careers--> TOHOKU UNIVERSITYCREATING GLOBAL EXCELLENCE Search 日本語 Contact Tohoku University --> About Facts & Figures Facilities Organization Chart History President's Message Top Global University Project Designated National University Global Network Promotional Videos Academics Undergraduate Graduate Courses in English Exchange Programs Summer Programs Double Degree Programs Academic Calendar Syllabus Admissions Undergraduate Admissions Graduate Admissions Fees and Expenses Financial Aid Research Feature Highlights Research Releases University Research News Research Institutes Visitor Research Center Research Profiles Academic Research Staff Campus Life International Support Office IT Services Facilities Dining & Shops Campus Bus Clubs & Circles News University News Research--> Arts & Culture Health & Sports Campus & Community Press Release--> International Visit Alumni Careers Events Exhibits Music Special Event Lecture Alumni--> Map & Directions Campus Maps & Bus--> Facilities Map--> TOHOKUUNIVERSITY About Academics Admissions Research Campus Life News Events International Affairs Students Current Students Alumni Faculty/Staff Promotional Videos Subscribe to our Newsletter Map & Directions Contact Jobs & Vacancies Emergency Information Site Map 日本語 Close Home Research News Researchers Successfully Establish a Strong Mechanical Bond of Immiscible Iron and Magnesium Research News Researchers Successfully Establish a Strong Mechanical Bond of Immiscible Iron and Magnesium 2023-04-17 Conventional transportation equipment relies heavily on steel. But steel is heavy, and scientists are turning to alternatives in the quest to improve the safety and speed of transportation, whilst simultaneously lessening its environmental footprint. Magnesium alloys, with their low density and excellent strength-to-weight ratio, are considered the next-generation base metal for multi-material design and have been touted as a possible replacement for conventional steels when appropriate. Although progress has been made in overcoming certain weaknesses associated with magnesium alloys, such as flammability, developing bonding technology that bonds magnesium alloys with structural steels has been severely limited because magnesium and iron are immiscible and do not form at the alloy phase. Yet, a research group from Tohoku University has succeeded in establishing a dealloying bonding technology that obtains a strong mechanical bond between iron and magnesium. "Our dealloying reaction derives from the miscibility and immiscibility of the constituent elements in the bond, and also helped create a three-dimensional, interlocked microstructure at the interface of the two materials," said Kota Kurabayashi, a master's student at the Graduate School of Engineering, who co-authored the study along with Professor Hidemi Kato and Associate Professor Takeshi Wada from the Institute for Materials Research. A schematic illustration that represents the dealloying bonding of iron and magnesium. Firstly, the iron-nickel layer is bonded on the top of the iron. Subsequently, Mg is attached and heated. Then, the dealloying reaction of nickel elements selectively diffuses into magnesium. Meanwhile, the developing bicontinuous structure of iron and magnesium occurs. Due to the anchor effect of such a structure, iron and magnesium were strongly bonded even though they are immiscible. ©K. Kurabayashi, T. Wada, & H. Kato Kato also points out that this approach provides an ideal mechanical bonding method that creates a strong anchoring effect between materials that cannot form strong bonds. Looking ahead, the research group plans to harness the advance dealloying technique to bond immiscible dissimilar materials and produce new light-weight materials that reduce the fuel consumption of automobiles, trains, and airplanes. Publication Details: Title: Dissimilar Joining of Immiscible Fe-Mg using Solid Metal DealloyingAuthors: Kota Kurabayashi, Takeshi Wada, Hidemi KatoJournal: Scripta MaterialiaDOI: 10.1016/j.scriptamat.2023.115404 Press release in Japanese Contact: Hidemi Kato, The Institute for Materials ResearchEmail: hidemi.kato.b7tohoku.ac.jpWebsite: http://www.nem2.imr.tohoku.ac.jp/index-e.html Archives 2014&＃24180; 2015&＃24180; 2016&＃24180; 2017&＃24180; 2018&＃24180; 2019&＃24180; 2020&＃24180; 2021&＃24180; 2022&＃24180; 2023&＃24180; Page Top About Tohoku University Academics Admissions Research Campus Life News Events International Affairs Students Alumni Promotional Videos Subscribe to our Newsletter Map & Directions Contact Tohoku University Jobs & Vacancies Emergency Information Site Map Media Enquiries Parent & Family Support Public Facilities Contact Tohoku University