Análise da transformação martensítica induzida por deformação em aços com efeito TRIP
In pursuit of advanced automotive solutions, high strength steels (AHSS, High Strength Steels) have been improved to replace advanced high strength steels as they can enhance and improve the safety of mechanical vehicles. Among the AHSS, TRIP (Transformation Induced Plasticity) steels stand out,...
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| Formato: | bachelorThesis |
| Idioma: | pt_BR |
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Universidade Federal do Rio Grande do Norte
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| Endereço do item: | https://repositorio.ufrn.br/handle/123456789/46297 |
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| Resumo: | In pursuit of advanced automotive solutions, high strength steels (AHSS, High
Strength Steels) have been improved to replace advanced high strength steels as
they can enhance and improve the safety of mechanical vehicles. Among the AHSS,
TRIP (Transformation Induced Plasticity) steels stand out, which propose a
microstructure consisting of ferritic and bainitic grains with austenite islands. One of
the main characteristics of TRIP steels is the occurrence of martensitic
transformation induced by plastic deformation, promoting high coefficient of work
hardening, high plasticity and toughness. In this work, two samples of different
classes of cold rolled TRIP steels were used, with 690 and 780 MPa of resistance
limit with approximately 1.5 mm of thickness. As they were manually bent at 90° with
the aid of a vise and later embedded and metallographically prepared to be made via
EBSD (Electron Backscattering Diffraction). They were carried out along the cross
section of the sample in the deformed and long region of the bend, as a comparative
basis of the microstructural evolution of the material as a function of deformation. It
was possible to study the behavior of the microstructure in different functions,
becoming an applied training model. From the EBSD formation formation variations,
it was possible to evaluate the diversity of plastic formation variations, in addition to
the evaluation of the plastic formation distribution, in addition to the evaluation of the
microstructure formation distribution. Where it was possible to analyze it after the
transformation of the austenite of metastable plasticity in increasing the mechanical
properties of this material, characteristic of this great importance in the control of this
class of steels. |
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