Influence of processing parameters on hot workability and microstructural evolution in a carbon–manganese–silicon steel. (25th December 2015)

• Record Type: Journal Article
• Authors: Arvinth Davinci, M.; Samantaray, Dipti; Borah, Utpal; Albert, Shaju K.; Bhaduri, A.K.
• Is Part Of: Materials & design. Volume 88(2015:Dec.)
• Page Start: 567
• Page End: 576
• Publication Date: 2015-12-25
• Subjects: Carbon-manganese-silicon steel -- Flow behavior -- Microstructure -- Mechanical properties; Materials -- Periodicals; Engineering design -- Periodicals; Matériaux -- Périodiques; Conception technique -- Périodiques; Electronic journals; 620.11
• DOI: 10.1016/j.matdes.2015.09.061
• Languages: English
• ISSNs: 0264-1275

Abstract

Abstract: In this work, the influence of processing variables such as strain, strain rate, temperature and cooling medium, on workability, microstructural evolution and mechanical properties of a carbon–manganese–silicon (C–Mn–Si) steel have been studied. Hot deformation of the C–Mn–Si steel has been carried out using compression testing over a domain 1223–1473 K and 0.001–10 s − 1 where the steel is in austenitic phase field. The effect of cooling medium on the microstructural evolution has been studied by carrying out post-deformation cooling of the specimens in air and water media. Influence of the cooling medium on properties of the steel has been evaluated by comparing the hardness and Charpy impact test results. Based on the flow behavior analysis and microstructural examinations the optimum domain for the hot deformation of C–Mn–Si steel is found to be in the ranges of 1273–1350 K and 3–10 s − 1 . Flow instability in C–Mn–Si steel is manifested in the form of deformation bands in the microstructure. The signature of instability is not influenced by the phase transformation. The hardness of the material is dependent on the temperature of deformation and influenced by cooling medium. However, it does not show any correlation with deformation strain rate. Graphical abstract: Highlights: Effect of ε ̇, T and cooling medium on workability of C–Mn–Si steel has been studied. Hot isothermal compression tests have been used to generate experimental data. It is observed that ε, ε ̇ and T affect workability of the steel during hot deformation. Choice of cooling medium affects microstructure and mechanical properties. Features of unstable flow remain in specimens even after changing the cooling medium.