Journal
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
Volume 615, Issue -, Pages 255-261Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.msea.2014.07.077
Keywords
High strength low alloy (HSLA) steel; Thermomechanical controlled processing (TMCP); Precipitation hardening; Interphase precipitation; Nanometer-sized carbide
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Funding
- POSCO
- Korea Research Council of Fundamental Science and Technology (KRCF) through Development of Advanced Materials Metrology
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Rolling temperature was found to play a decisive role in the precipitation hardening of Ti-Mo microalloyed hot-rolled high strength steel, despite identical chemical composition and phase transformation condition. The different microstructural features of prior austenite grain structure and dislocation structures inside austenite and/or ferrite grain, and the change of austenite/ferrite phase transformation characteristic, depending on rolling temperature, significantly influenced the precipitation characteristics of interphase-precipitated nanometer-sized carbides and consequently led to a totally different precipitation hardening effect. (C) 2014 Elsevier B.V. All rights reserved.
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