School of Materials Science and Engineering Koh Young-gun team develops new material that has high durability and high ductile strength simultaneously
Published in latest issue of global academic journal, 'Scientific Report'
Various industrial possibilities by applying technologies with other materials
[August 2, 2016]
[Source: KBS News]
School of Material Science and Engineering Professor Koh Young-gun (39, photo) and his research team is receiving attention from academic circles by developing a new alloy material that upgraded both strength and ductility.
Recently, Professor Koh announced his research results by developing a new magnesium alloy, which is receiving attention as a next-generation structural material. The specific gravity of magnesium alloy is only 1.74, which is 75% lighter than steel and 35% lighter than aluminum alloy. However, it has a hexagonal close-packet structure (each particle making up a solid comes into contact with 12 different particles, and thus comes into contact with six particles on a plane, which minimizes empty spaces) and has the critical weakness of having low ductility.
Through this research, Professor Koh's research team succeeded in resolving such structural problem and succeeded in procuring both high durability and ductility.
Professor Koh said, "In order to resolve the structural problem of magnesium materials, we creatively crossed shear (when opposite forces are applied on any plane of an object, phenomenon where that object is transformed by slipping across that place) transformation and achieved high durability by controlling the nano crystal grain, and at the same time, we succeeded in obtaining high ductility by effectively spreading the preferred orientation of the basal plane." He added, "Normally, when intensity increases, ductility decreases, but through the magnesium alloy that we developed in this study, we were able to obtain the dream material with the paradox of having both durability and ductility, while breaking down past preconceptions."
Their research results were published in the latest issue of the world-acclaimed academic journal <Scientific Reports> (impact factor (IF) 5.228) under the title 'High durability and high ductility of light-weight magnesium allow by cross shearing'. Scientific Reports is a comprehensive academic journal spanning across all scientific fields including metals, physics, chemistry and biology published by Nature Publishing Group, which is issued by the world famous science newsletter, Nature.
Professor Koh said, "The cross shearing plastic working technology proposed in this research can be applied in existing material processing sectors, and it is easy to commercialize, so it is expected to have great industrial ripple effects." He added, "As an innovative technology for developing high intensity and high ductility materials, it can be applied in different materials such as steel, aluminum and titanium, and so it by expanding the field of application, it will be possible to create new industries."
Meanwhile, this study was carried out with the support of the Ministry of Education's Basic Research Support Project.
