Título

QUANTITATIVE METALLOGRAPHIC ANALYSIS OF THE EFFECT OF MECHANICAL DEFORMATION IN TRIP STEELS

QUANTITATIVE METALLOGRAPHIC ANALYSIS OF THE EFFECT OF MECHANICAL DEFORMATION IN TRIP STEELS

Autoria

Santos, Ana Luiza Dos; Farias, Willian Alber da Silva; Ferreira, Jetson Lemos; Rodrigues, Flavio José Saraiva; Castro, Nicolau Apoena; Souza, Marden Valente de

DOI

10.5151/2594-5297-40364

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Resumo

The growth of the automotive sector has set new standards for the production and application of modern materials. Current vehicle models require a design that enables weight reduction, greater resistance and safety against collisions. Consequently, advanced high strength steels (AHSS) have been innovatively produced to meet these needs. In this scenario, TRIP (Transformation Induced Plasticity) steels play a crucial role in the automotive sector. Hardening, induced by phase transformation by plastic deformation, increases the strength of the system with TRIP steels in its structure. To obtain information about the conformability of these new materials, an experimental analysis was performed using Digital Image Correlation (DIC) techniques to evaluate the transformation of the metastable austenite present in the microstructure of the material into martensite. Samples under different stress levels were evaluated by the electron backscatter diffraction technique (EBSD), the results suggested that increasing levels of strain lead to a reduction in retained austenite due to an increase in dislocation density, which in turn leads to stabilization of retained austenite. The results of this study can contribute to the development of more effective strategies for the production of AHSS, in addition to helping to understand the behavior of TRIP steels during deformation.

 

The growth of the automotive sector has set new standards for the production and application of modern materials. Current vehicle models require a design that enables weight reduction, greater resistance and safety against collisions. Consequently, advanced high strength steels (AHSS) have been innovatively produced to meet these needs. In this scenario, TRIP (Transformation Induced Plasticity) steels play a crucial role in the automotive sector. Hardening, induced by phase transformation by plastic deformation, increases the strength of the system with TRIP steels in its structure. To obtain information about the conformability of these new materials, an experimental analysis was performed using Digital Image Correlation (DIC) techniques to evaluate the transformation of the metastable austenite present in the microstructure of the material into martensite. Samples under different stress levels were evaluated by the electron backscatter diffraction technique (EBSD), the results suggested that increasing levels of strain lead to a reduction in retained austenite due to an increase in dislocation density, which in turn leads to stabilization of retained austenite. The results of this study can contribute to the development of more effective strategies for the production of AHSS, in addition to helping to understand the behavior of TRIP steels during deformation.

Palavras-chave

AHSS

AHSS, TRIP, DIC, EBSD.