Procedia Materials Science 8 (2015) 1047 – 1056 Available online at www.sciencedirect.com 2211-8128 © 2015 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/). Selection and peer-review under responsibility of the scientific committee of SAM - CONAMET 2013 doi:10.1016/j.mspro.2015.04.167 ScienceDirect International Congress of Science and Technology of Metallurgy and Materials, SAM - CONAMET 2013 Effect of carbon content on microstructure and mechanical properties of dual phase steels Valeria L. de la Concepción a , Hernán N. Lorusso a,b , Hernán G. Svoboda b,c* a Centre of Mechanics, National Institute of Industial Technology, Av. General Paz 5445, Buenos Aires (B1650KNA), Argentina b Laboratory of Materials and Structures, School of Engineering, INTECIN, University of Buenos Aires, Av. Las Heras 2214, Buenos Aires (C1127AAR), Argentina c National Council of Scientific and Technical Researches (CONICET), Av. Rivadavia 1917, Buenos Aires (C1033AAJ), Argentina Abstract Dual-Phase steels (DP) are constituted by a ferrite matrix with a martensite fraction, giving a good combination of strength, ductility, capacity of energy absorption and strain hardening. Mechanical properties are controlled by martensite and ferrite fractions, martensite carbon content, grain sizes and strength of both phases. The carbon content affects the martensite hardness and the hardenability. This work studied the effect of carbon content on microstructure and mechanical properties of DP steels. Samples of steels with different carbon content were heat treated at different intercritical temperatures, obtaining DP steels with different fractions of martensite. Microstructural characterization, microhardness and tensile test were made for each condition. Increasing carbon content and martensite fraction hardness and strength were increased. The best properties combination was reach for steels with a carbon content of 0.1 to 0.15% and 50% of martensite. Stress relationships obtained were from 1.55 to 2.25. Keywords: Dual Phase steels; carbon content; martensite; microstructure; mechanical properties * Corresponding author. Tel.: +5411-4514-3009; fax: +5411-4514-3009 E-mail address: [email protected] © 2015 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/). Selection and peer-review under responsibility of the scientific committee of SAM - CONAMET 2013
Effect of carbon content on microstructure and mechanical properties of dual phase steels
Apr 25, 2023
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