Phaniraj, M. P. Shin, Young-Min Lee, Joonho Goo, Nam Hoon Kim, Dong-Ik Suh, Jin-Yoo Jung, Woo-Sang Shim, Jae-Hyeok Choi, In-Suk 2024-01-20T07:03:08Z 2024-01-20T07:03:08Z 2021-09-05 2015-05-01 0921-5093 https://pubs.kist.re.kr/handle/201004/125459 A low carbon ferritic steel was alloyed with Ti, Mo and Cu with the intention of achieving greater increment in strength by multiple precipitate strengthening. The steel is hot rolled and subjected to interrupted cooling to enable precipitation of Ti-Mo carbides and copper. Thermodynamic calculations were carried out to determine equilibrium phase fractions at different temperatures. Microstructure characterization using transmission electron microscopy and composition analysis revealed that the steel contains similar to 5 nm size precipitates of (Ti,Mo)C. Precipitation kinetics calculations using MatCalc software showed that mainly body centered cubic copper precipitates of size < 5nm form under the cooling conditions in the present study. The steel has the high tensile strength of 853 MPa and good ductility. The yield strength increases by 420 MPa, which is more than that achieved in hot rolled low carbon ferritic steels with only copper precipitates or only carbide precipitates. The precipitation and strengthening contribution of copper and (Ti,Mo)C precipitates and their effect on the work hardening behavior is discussed. (C) 2015 Elsevier B.V. All rights reserved. English ELSEVIER SCIENCE SA LOW-ALLOY STEELS PRECIPITATION KINETICS MECHANICAL-PROPERTIES FE-CU EVOLUTION BEHAVIOR NB SIMULATION NUCLEATION PARTICLES Development of high strength hot rolled low carbon copper-bearing steel containing nanometer sized carbides Article 10.1016/j.msea.2015.02.067 1 MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, v.633, pp.1 - 8 MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 633 1 8 scie scopus 000353845200001 2-s2.0-84924985596 Nanoscience & Nanotechnology Materials Science, Multidisciplinary Metallurgy & Metallurgical Engineering Science & Technology - Other Topics Materials Science Metallurgy & Metallurgical Engineering Article LOW-ALLOY STEELS PRECIPITATION KINETICS MECHANICAL-PROPERTIES FE-CU EVOLUTION BEHAVIOR NB SIMULATION NUCLEATION PARTICLES HSLA steel Copper Nano-sized carbides Interrupted cooling Numerical simulation