A review of recent progress in mechanical and corrosion properties of dual phase steels
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(2020) 20:85
REVIEW ARTICLE
A review of recent progress in mechanical and corrosion properties of dual phase steels Alireza Kalhor1 · Maryam Soleimani1 · Hamed Mirzadeh1 · Vitoon Uthaisangsuk2 Received: 28 February 2020 / Revised: 9 June 2020 / Accepted: 29 June 2020 © Wroclaw University of Science and Technology 2020
Abstract New concepts proposed for processing of dual phase (DP) steels as one of the main classes of advanced high-strength steels (AHSSs) to enhance their mechanical properties (strength–ductility combination) and corrosion resistance were introduced. The current review covers (I) the processing routes to obtain the ferritic–martensitic microstructures, (II) parameters of intercritical annealing (IA) treatment, (III) primary thermomechanical treatments, and (IV) post processing. First, the principal heat treatment methods, i.e., step quenching, intermediate quenching, and intercritical annealing of ferritic–pearlitic steel, as well as the partitioning of manganese were critically discussed. Then, the effects of holding time at the intercritical annealing temperature on the austenitization, grain coarsening kinetics, abnormal grain growth, and volume fraction of martensite were summarized. Next, the importance of cold deformation (notably rolling) and heating rate for the development of fine-grained DP microstructures (with chain-networked martensitic islands) through recrystallization and modification of the preferred nucleation sites for the austenite phase was discussed. Moreover, the applications of severe plastic deformation techniques (such as constrained groove pressing), thermal cycling (multi-step or repetitive intercritical annealing), and spheroidization heat treatment were discussed. Finally, the impacts of tempering, quench aging, and bake hardening on the properties of DP steel were reviewed. This short overview shows the opportunities that the conventional and innovative processing routes can offer for the potential industrial applications of DP steels, especially in the lightweight car body for the automotive industry to address the safety, fuel consumption, and air pollution issues. Keywords DP steels · Thermomechanical processing · Intercritical annealing · Mechanical properties · Corrosion resistance
1 Introduction While enhanced strength and safety can be achieved by increasing the gauge thickness of automobile components, fuel consumption and air pollution issues on the other hand hinder the utilization of thick materials [1]. Therefore, high performance materials are more attractive. The steel industry has responded to this demand by developing advanced high-strength steels (AHSS) with complex microstructures [2]. Figure 1 illustrates a huge increase in the applications * Hamed Mirzadeh [email protected] 1
School of Metallurgy and Materials Engineering, College of Engineering, University of Tehran, PO Box 11155‑4563, Tehran, Iran
Department of Mechanical Engineering, Faculty of Engineering, King Mongkut’s University of Technology Thonburi, Bangkok 10140, Thailand
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