Kim, J. T. Hong, S. H. Park, H. J. Park, G. H. Suh, J. Y. Park, J. M. Kim, K. B. 2024-01-20T06:01:55Z 2024-01-20T06:01:55Z 2022-01-25 2015-10 0925-8388 https://pubs.kist.re.kr/handle/201004/124914 In this study, we explore the microstructural modulation and mechanical properties of Fe-Nb-B ultrafine composites by the addition of boron. According to the evolution of microstructure, mechanical properties including yield strength and plastic strain were significantly changed. With increase of boron content, Fe-B type compounds were newly formed and eutectic structured matrix was concurrently altered. Newly formed phases with high hardness/elastic modulus leads to considerably increase the yield strength up to 3110 MPa but macroscopic plasticity is deteriorated inadequately. To understand the origin of critically changed macroscopic mechanical properties, the values of hardness and elastic modulus obtained from nanoindentation test were plotted and demonstrated as a contour map. The structural characterization and nano-scale mechanical analysis are capable of providing the clear evidence to understand the relationship between microstructure and mechanical properties of the ultrafine multi-phase composites. (C) 2015 Elsevier B.V. All rights reserved. English Elsevier BV Influence of microstructural evolution on mechanical behavior of Fe-Nb-B ultrafine composites with a correlation to elastic modulus and hardness Article 10.1016/j.jallcom.2015.05.246 1 Journal of Alloys and Compounds, v.647, pp.886 - 891 Journal of Alloys and Compounds 647 886 891 N scie scopus 000361156400123 2-s2.0-84936758699 Chemistry, Physical Materials Science, Multidisciplinary Metallurgy & Metallurgical Engineering Chemistry Materials Science Metallurgy & Metallurgical Engineering Article METAL-MATRIX COMPOSITE HIGH-TENSILE DUCTILITY HIGH-STRENGTH SHEAR BANDS NANOCRYSTALLINE PLASTICITY FRACTURE ALLOYS DEFORMATION TOUGHNESS Mechanical properties Nanoindentation Composite materials Metals and alloys Phase transitions