Kim, J. T. Hong, S. H. Park, H. J. Kim, Y. S. Park, G. H. Lee, N. Park, J. -Y. Seo, Y. Suh, J. -Y. Lee, J. K. Park, J. M. Kim, K. B. 2024-01-20T06:04:20Z 2024-01-20T06:04:20Z 2022-01-25 2015-09 0925-8388 https://pubs.kist.re.kr/handle/201004/125041 Microstructural investigations of a Fe81Nb9B10 ultrafine-eutectic composite reveal that spherical eutectic colonies are composed of the radial lamellar structure together with NbFeB pro-eutectic phases which are central area on radial structure. The spherical eutectic colonies are proposed to be effectual in high yield strength as well as large plasticity by a rotational motion of those along the colony boundary during deformation. Formation of the wavy and dense shear bands is related with strong interaction between specific microstructure and localized shear deformation. Accordingly, the control of microstructural and mechanical factors in hierarchical ultrafine composite is crucial for enhancement of macroscopic mechanical properties. (C) 2015 Elsevier B.V. All rights reserved. English Elsevier BV Enhancement of mechanical properties in a Fe81Nb9B10 ultrafine-eutectic composite with in-situ polygonal pro-eutectic and encapsulating eutectic structure Article 10.1016/j.jallcom.2014.12.195 1 Journal of Alloys and Compounds, v.643, pp.S204 - S208 Journal of Alloys and Compounds 643 S204 S208 N scie scopus 000357903400037 2-s2.0-84930924565 Chemistry, Physical Materials Science, Multidisciplinary Metallurgy & Metallurgical Engineering Chemistry Materials Science Metallurgy & Metallurgical Engineering Article MEDIATED HIGH-STRENGTH LARGE PLASTICITY ALLOYS BEHAVIOR MICROSTRUCTURE DUCTILITY SCALE Metals and alloys Nanostructured materials Mechanical properties Microstructure