Evaluation of Residual Stresses and Mechanical Properties of IF Steel Welded Joints by Laser and Plasma Processes

Dias, Joanes Silva; Chuvas, Tatiane de Campos; Fonseca, Maria Cindra

doi:10.1590/1980-5373-mr-2015-0558

Cited by 11 publications

(3 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Com isso, a vida útil do material quanto à resistência à fadiga pode ser influenciada pela natureza dessas tensões, uma vez que tensões residuais trativas são prejudiciais por facilitar a nucleação e propagação de trincas. Por outro lado, as tensões de natureza compressivas são benéficas por dificultar a nucleação e a propagação de trincas, reduzindo a tensão total na superfície da peça [8][9].…”

Section: Introductionunclassified

Influência da composição do gás de proteção nas tensões residuais de juntas de aço DP600 soldadas pelo processo GMAW

et al. 2019

View full text Add to dashboard Cite

RESUMO A indústria automobilística vem investindo em novos processos de fabricação que melhoram a produtividade sem perda da qualidade. Entretanto, a presença de tensões residuais, geradas em todos os processos de fabricação, constitui um dos grandes problemas encontrados na indústria metal mecânica, pois estas podem se somar às tensões de carregamento externo e causar falhas catastróficas em equipamentos e componentes. Sendo a soldagem um dos processos de fabricação mais utilizados atualmente, é necessário entender como os parâmetros de soldagem impactam na natureza e magnitude das tensões residuais geradas. Em alguns processos de soldagem são utilizados gases de proteção, que podem influenciar a condutividade do arco elétrico e, consequentemente, afetar o comportamento das tensões residuais nas juntas soldadas. Neste trabalho foi realizado um estudo experimental sobre a influência do percentual de CO2 dos gases de proteção com base em argônio, nas tensões residuais geradas em juntas de aço avançado de alta resistência DP600, soldadas pelo processo GMAW (amplamente utilizado na indústria automobilística). As tensões residuais foram medidas por difração de raios-X, pelo método do sen2ψ. A avaliação microestrutural foi realizada através de microscopia óptica. Os resultados mostraram que as tensões residuais têm natureza trativa, da ordem de 120 MPa, em todas amostras que utilizaram gás de proteção com menor percentual de CO2.

show abstract

Section: Introductionunclassified

Influência da composição do gás de proteção nas tensões residuais de juntas de aço DP600 soldadas pelo processo GMAW

et al. 2019

View full text Add to dashboard Cite

show abstract

“…Therefore, it is very important to understand the nature and size of the residual stress at the end of the welding because it can directly affect the service life of parts. Dias [20] et al analyze the residual stresses resulting from laser beam welding and plasma arc welding processes by X-ray diffraction technique, with sin2ψ method in Interstitial free (IF) steel butt joints. The result indicated that the residual stresses at the top and root of the welded joint are very similar in magnitude for both of the welding processes.…”

Section: Introductionmentioning

confidence: 99%

Assessment of Mechanical Properties, Residual Stresses and Diffusible Hydrogen of Longitudinal Weld in Electric Water Heater Tanks

Puoza

Hua

Moro

et al. 2017

JMMP

View full text Add to dashboard Cite

Abstract:The core technique of electric storage water heaters is the manufacture of the tanks, and the welding technique is the key technology of the tank manufacture. A company producing water heaters received feedback from its after-sales that a large quantity of water leakage from the tanks was found in the market. A follow-up on the manufacturing site by the researchers showed that the position of the water leakage defects mostly happens in the welds of the tanks. Series of experiments were conducted to investigate the mechanical properties, residual stress, and diffusible hydrogen content of the longitudinal weld of the tank. Results of the mechanical properties showed that both the micro-hardness and the tensile strength of the welds are higher than the base metal. There are higher residual compressive stresses in the weld center and the adjacent-weld zone. Vertical residual compressive stress decreases first and then increases (149 MPa-28 MPa-134 MPa) from the weld ends to the middle, whilst the transversal stress decreases continuously (332 MPa~240 MPa) from the weld center to the heat affected zone. After enameling, the longitudinal welds' peak micro-hardness of coarse grained region reduces by 30.9 HV1, and the average micro-hardness of the HAZ reduces by 5 HV1. The average vertical residual compressive stress difference of the same test points reduces from 270.6 MPa to 20.4 MPa. It proves that enameling can improve the mechanical property of the longitudinal welds.

show abstract

“…For a proper mathematical modelling of its behavior at the macro-level, an accurate understanding of different effects related to the material; such as its initial anisotropy as well as its hardening is necessary. Many studies have focused in the welding of IF steels [9,[29][30][31]. However, there is a need to develop models that can describe the behaviour of this laser welded material under a number of loading conditions.…”

mentioning

confidence: 99%

Identification of the anisotropic behavior of the laser welded Interstitial Free steel HC260Y subjected to uniaxial tensile tests

Arfaoui¹,

Samet²,

Znaidi³

2022

Frattura Ed Integrità Strutturale

View full text Add to dashboard Cite

The main purpose of this paper is to study the anisotropic behavior of laser welded interstitial free steel HC 260Y when it is subjected to monotonic tensile tests. The specimens were cut in different orientations according to the rolling direction, annealed and finally assembled by laser welding. The plastic behavior was modelled using an identification strategy based on a behavior law taking into account the anisotropy of this material, a hardening law describing the evolution of the hardening curves and an evolution law. The proposed identification strategy allowed for a good validation of the model. The model was afterwards used to predict the behavior of the welded material when it is subjected to various solicitations. Finally, the fracture surfaces of the specimens were examined using the scanning electron microscope (SEM) to determine the failure characteristics under the tensile loading.

show abstract

Evaluation of Residual Stresses and Mechanical Properties of IF Steel Welded Joints by Laser and Plasma Processes

Cited by 11 publications

References 11 publications

Influência da composição do gás de proteção nas tensões residuais de juntas de aço DP600 soldadas pelo processo GMAW

Influência da composição do gás de proteção nas tensões residuais de juntas de aço DP600 soldadas pelo processo GMAW

Assessment of Mechanical Properties, Residual Stresses and Diffusible Hydrogen of Longitudinal Weld in Electric Water Heater Tanks

Identification of the anisotropic behavior of the laser welded Interstitial Free steel HC260Y subjected to uniaxial tensile tests

Contact Info

Product

Resources

About