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Article Dans Une Revue Tecnologia em Metalurgia e Materiais Année : 2010

CARACTERÍSTICAS DO ENCRUAMENTO DO AÇO TWIP ALTO Mn E BAIXO CARBONO LAMINADO A FRIO E RECOZIDO

Résumé

There is a current need for the automotive industry for materials that combine high formability, high strength and low specific weight in order to reduce fuel consumption and increase passenger safety. In this context, appears the TWIP steel (TWinning Induced Plasticity), defined as a steel with high content of manganese and, yet, silicon and aluminum (2% to 4%) in its composition. Its main feature is the formation of twining under stress. In this study, it was investigated how the characteristics of hardening work of the steel C-0,06, Mn-25, Al-3, Si-2, Ni-1, with TWIP effect, hot and cold rolling and annealing at temperatures varying between 600°C and 850°C, influences their mechanical properties. This research used optical micrography and scanning electron microscopy (SEM) for assessment of grain size and volume fraction of recrystallized grains. To complement this study, tensile tests were performed. The hardening work study uses the approach of Hollomon associated with the Considère criterion. The sample annealing to 850°C shows a work hardening exponent of 0.55, 66% of total elongation and maximum strength of 700 MPa.

Dates et versions

hal-04304482 , version 1 (24-11-2023)

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Dayanna Moreira Duarte, Érica Aparecida Silva Ribeiro, Lorena Freitas, Berenice Mendonça Gonzalez, Dagoberto Brandão Santos. CARACTERÍSTICAS DO ENCRUAMENTO DO AÇO TWIP ALTO Mn E BAIXO CARBONO LAMINADO A FRIO E RECOZIDO: BEHAVIOR IN THE STRAIN HARDENING OF HIGH Mn AND LOW CARBON TWIP STEEL COLD ROLLING AND ANNEALING. Tecnologia em Metalurgia e Materiais, 2010, 6 (4), pp.225-229. ⟨10.4322/tmm.00604008⟩. ⟨hal-04304482⟩
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