Title

QUALITATIVE ANALYSIS OF CUT EDGES IN DP780 STEEL TESTED AT ROOM AND CRYOGENIC TEMPERATURES

QUALITATIVE ANALYSIS OF CUT EDGES IN DP780 STEEL TESTED AT ROOM AND CRYOGENIC TEMPERATURES

Authorship

Barbosa, Henrique Tomé; Gonçalves, Rennáh Francisco Figueiredo; Rodrigues., Flavio José Saraiva; Ferreira, Jetson Lemos; Oliveira, Adilson José de; Melo, Anderson Clayton Alves de; Sousa, Fábio José Pinheiro; Castro, Nicolau Apoena

Barbosa, Henrique Tomé

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Gonçalves, Rennáh Francisco Figueiredo

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Rodrigues., Flavio José Saraiva

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Ferreira, Jetson Lemos

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Oliveira, Adilson José de

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Melo, Anderson Clayton Alves de

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Sousa, Fábio José Pinheiro

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Castro, Nicolau Apoena

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DOI

10.5151/2594-5297-40304

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Abstract

This article focuses on the use of dual-phase steels (DP), which are advanced high-strength steels (AHSS) widely used in the construction of automotive body parts due to their exceptional strength, formability, and energy absorption capacity when deformed. The use of DP steels in place of conventional steels results in lighter and less polluting vehicles. These steels undergo stamping processes, such as cutting, pressing, and folding, to create automotive parts. The quality of cutting-edges is crucial in folding stages, as the presence of heterogeneities and defects can lead to part failure during manufacturing. This study seeks to investigate the influence of temperature on the quality of cutting-edges by utilizing Scanning Electron Microscopy (SEM) and Electron Backscatter Diffraction to analyze the microstructural characteristics of the samples. The findings of this study demonstrate that inducing brittle fracture through the use of liquid nitrogen vapor is an effective approach for homogenizing cut edges. This is because cut edges subjected to this process exhibit lower levels of plastic deformation during the cutting stages.

This article focuses on the use of dual-phase steels (DP), which are advanced high-strength steels (AHSS) widely used in the construction of automotive body parts due to their exceptional strength, formability, and energy absorption capacity when deformed. The use of DP steels in place of conventional steels results in lighter and less polluting vehicles. These steels undergo stamping processes, such as cutting, pressing, and folding, to create automotive parts. The quality of cutting-edges is crucial in folding stages, as the presence of heterogeneities and defects can lead to part failure during manufacturing. This study seeks to investigate the influence of temperature on the quality of cutting-edges by utilizing Scanning Electron Microscopy (SEM) and Electron Backscatter Diffraction to analyze the microstructural characteristics of the samples. The findings of this study demonstrate that inducing brittle fracture through the use of liquid nitrogen vapor is an effective approach for homogenizing cut edges. This is because cut edges subjected to this process exhibit lower levels of plastic deformation during the cutting stages.

Keywords

Dual-Phase Steel; Crygenic; SEM; EBSD.

Dual-Phase Steel; Crygenic; SEM; EBSD.