Home FOR AUTHORS Kovove Materialy-Metallic Materials 2017 Metallic Materials Vol. 55 (2017), no. 5, pp.333-342

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Metallic Materials Vol. 55 (2017), no. 5, pp.333-342

Title: The effect of microstructure on tensile strength of high martensite dual-phase steels

Abstract: In this work, different dual phase (DP) microstructures were produced in 15CrNiMo7 steel, in order to study the effect of martensite volume fraction (MVF), martensite morphology (MM), and epitaxial ferrite (EF) on tensile strength behavior. Mechanical properties of five different DP steels have been investigated by carrying out tensile and hardness tests. By increasing the martensite content, both tensile and yield strengths increased. The presence of new ferrite caused a decrease in strength and increase in ductility. Fractography analysis after the tensile test was performed by using SEM.

Keywords: high martensite, morphology, epitaxial ferrite, tensile strength, dual-phase steel
Published online: 08-Nov-2017
Year: 2017, Volume: 55, Issue: 5 Page From: 333, Page To: 342

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