Enhancement of mechanical properties of low carbon steel based on heat treatment and thermo-mechanical processing routes

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Balavar Mohsen; MIRZADEH HAMED

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Journal Paper

Paper Information

Journal: JOURNAL OF ULTRAFINE GRAINED AND NANOSTRUCTURED MATERIALS Year:2018 | Volume:51 | Issue:2 Page(s): 169-173

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Title

Enhancement of mechanical properties of low carbon steel based on heat treatment and thermo-mechanical processing routes

Author(s)

Balavar Mohsen | MIRZADEH HAMED | Issue Writer Certificate

Keywords

Low carbon steel

Grain refinement

Mechanical properties

Strain hardening rate

Abstract

Thermal treatments and thermo-mechanical processing routes were applied on a conventional structural steel (st37 steel: 0. 12C-1. 11Mn-0. 16Si) for improvement of tensile properties and enhancement of work-hardening behavior. Full annealing resulted in a sheet with coarse ferrite grains and pearlite colonies arranged alternatively in distinct bands, which showed high ductility, low strength, and the presence of the yield point elongation at the beginning of the plastic flow. The cold-rolled sheet, however, showed poor ductility but much higher strength level. The dual phase (DP) sheet, resulted from intercritical annealing in the austenite plus ferrite region, showed a remarkable strength-ductility balance, which was related to the excellent work-hardening behavior. A bimodal-sized ferritic structure with the appearance of a poor strain hardening regime after experiencing a high yield stress was obtained from the subcritically annealed cold-rolled DP microstructure. The ultrafine-grained sheet was processed by applying the abovementioned route on a martensitic microstructure, which resulted in low ductility but high strength at ambient temperature. These results demonstrated the ability to control the properties of conventional steels by simple thermal and thermo-mechanical treatments.

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APA: Copy

Balavar, Mohsen, & MIRZADEH, HAMED. (2018). Enhancement of mechanical properties of low carbon steel based on heat treatment and thermo-mechanical processing routes. JOURNAL OF ULTRAFINE GRAINED AND NANOSTRUCTURED MATERIALS, 51(2), 169-173. SID. https://sid.ir/paper/347401/en

Vancouver: Copy

Balavar Mohsen, MIRZADEH HAMED. Enhancement of mechanical properties of low carbon steel based on heat treatment and thermo-mechanical processing routes. JOURNAL OF ULTRAFINE GRAINED AND NANOSTRUCTURED MATERIALS[Internet]. 2018;51(2):169-173. Available from: https://sid.ir/paper/347401/en

IEEE: Copy

Mohsen Balavar, and HAMED MIRZADEH, “Enhancement of mechanical properties of low carbon steel based on heat treatment and thermo-mechanical processing routes,” JOURNAL OF ULTRAFINE GRAINED AND NANOSTRUCTURED MATERIALS, vol. 51, no. 2, pp. 169–173, 2018, [Online]. Available: https://sid.ir/paper/347401/en

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