Thermo-mechanical analysis of the MIG/MAG multi-pass welding process on AISI 304L stainless steel plates

Farias, Rodrigo Martins; Teixeira, Paulo R.F.; Araújo, Douglas Bezerra de

doi:10.1007/s40430-016-0574-y

Cited by 9 publications

(11 citation statements)

References 24 publications

(25 reference statements)

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“…9 and Farias et al. 5 , which proves that the model can accurately reflect the temperature field changes during the welding process.…”

Section: Resultsmentioning

confidence: 66%

“…Farias et al. 5 established a finite element model for AISI 304L stainless steel multi-pass welding by the element birth and death technique, analyzed the distribution characteristics of the welding temperature field and stress field, and found that the growth process of the weld had an important influence on the welding mechanics analysis; thus, it was necessary to consider the dynamic growth process of the weld during the mechanical analysis. Zhan et al.…”

Section: Introductionmentioning

confidence: 99%

“…In recent years, many numerical simulation studies have been carried out on the MIG welding process, and the accuracy of this method has been proven by many experiments. 1,4–9 However, most of the existing numerical simulation that has been done is on the macroscopic scale, and there are no reports of welding simulations that consider the microstructure and grain heterogeneity. In this paper, a welding numerical simulation method is proposed to calculate the welding thermal stress distribution in grains that considers grain heterogeneity.…”

Section: Introductionmentioning

confidence: 99%

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Numerical simulation of the metal inert gas welding process that considers grain heterogeneity

Chang

Chen

Hang

et al. 2020

Proceedings of the Institution of Mechanical Engineers, Part L:

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It is of great significance to reveal the microevolution mechanism of welded structures during thermo-mechanical coupling to improve the welding quality. In this paper, a random microcrystalline structure model for welds is established by the Voronoi tessellation method. According to the nanoindentation results, heterogeneous grains are produced. A welding workpiece model with statistical significance is established. On this basis, the Python script and the birth and death element method are used to realize the transient growth of a weld, and a thermo-mechanical coupling model for the SUS301L-HT stainless steel metal inert gas welding process is established. The temperature field and thermal stress field are calculated. The calculation shows that the thermal stresses along the growth direction of the weld area are in the form of a “trapezoid,” and the stresses at both ends are small. The stress in the vertical direction of the weld has a single peak, and the peak appears in the center of the weld. The stress distribution of the model that considers heterogeneous grains is obviously inhomogeneous compared with that of the traditional model. The thermal stress distribution in the weldment is obviously inhomogeneous due to the heterogeneous grains, the stresses at the boundaries of the adjacent grains in the weldment change abruptly. It is found that the greater the difference in the mechanical properties between grains is, the more obvious the change.

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“…9 and Farias et al. 5 , which proves that the model can accurately reflect the temperature field changes during the welding process.…”

Section: Resultsmentioning

confidence: 66%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Numerical simulation of the metal inert gas welding process that considers grain heterogeneity

Chang

Chen

Hang

et al. 2020

Proceedings of the Institution of Mechanical Engineers, Part L:

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“…Portanto, as análises térmicas e mecânicas podem ser realizadas acopladas sequencialmente. Na maioria dos casos existentes (Cheng et al, 2016) (Farias et al, 2017) (Luo e Zhao, 2018), o método de análise termomecânica fracamente acoplado é preferido devido ao menor custo computacional.…”

Section: Modelagem Mecânicaunclassified

Simulações Computacionais dos Processos de Manufatura Aditiva de Metais: Um Review Introdutório

Farias

Vilarinho

2022

Soldag. insp.

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Resumo Os processos de Manufatura Aditiva (MA) de Metais permitem criar peças tridimensionais através da adição progressiva de finas camadas de material. Estes processos se enquadram em duas grandes categorias, denominadas Fusão em Leito de Pó e Deposição por Energia Direcionada. A compreensão física dos processos de MA pode fornecer uma visão holística sobre as sensibilidades aos parâmetros de processo. Já a modelagem computacional destes processos não só pode fornecer uma visão importante dos fenômenos físicos que levam às propriedades finais do material e à qualidade do produto, mas também os meios para explorar o espaço de projeto, visando criar produtos funcionais. Esta revisão introdutória foca na MA de materiais metálicos, particularmente nas questões de modelagem física e numérica. São apresentadas considerações sobre os diversos fenômenos físicos atuantes, métodos computacionais mais empregados, técnicas para realizar a modelagem e suas respectivas validações, demonstrando os desafios e limitações atuais, assim como as perspectivas futuras da simulação computacional aplicada aos processos de MA.

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“…The aim of this study is to develop and validate two heat input source models by ANSYS Multiphysics software  , which is FEM based model, to simulate the magnetic arc deflection in weld bead in autogean GTAW process. Both models are based on a Gaussian surface flux distribution, which has the advantage of having only two degrees of freedom (arc efficiency and radial distance from the center) and being suitable for a range of welding powers and plate thicknesses and diferent types of welding processes (Teixeira et al, 2014;Farias et al, 2017;Venkatkumar and Ravindran, 2016;Khurram et al, 2013;Hussain and Sherif El-Gizawy, 2016). Firstly, numerical simulations are compared with experimental ones for non-deflected arc to calibrate numerical models.…”

Section: Two Heat Source Models To Simulate Welding Processes With Mamentioning

confidence: 99%

Two Heat Source Models to Simulate Welding Processes with Magnetic Deflection

2017

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The technique of weaving by magnetic arc deflection was developed a few years ago to enable the oscillation of the weld pool, thus, causing grain refinement and improving the properties on the welded joint. This paper aims to propose two heat source models that include effects of magnetic arc deflection on a bead-on-plate GTAW process in numerical simulations by using the finite element method. Two cases are studied. In the first case, non-deflected arc and straigth magnectic deflected arc along the torch movement are carried out and compared to numerical simulations. Temperatures at three different points on the backside of the plates (two away from the welding center line and one in its center) and weld pools of SAE 1020 3.2 mm and 6 mm thick steel plates are analyzed. Results obtained by numerical simulations are close to the experimental ones. In the second case, welding with weaving (frequency of 1Hz) on 3 mm thick steel plates is analyzed. The bead width and its visual presentation are compared to experimental results, which show good agreement with both proposed models.

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Thermo-mechanical analysis of the MIG/MAG multi-pass welding process on AISI 304L stainless steel plates

Cited by 9 publications

References 24 publications

Numerical simulation of the metal inert gas welding process that considers grain heterogeneity

Numerical simulation of the metal inert gas welding process that considers grain heterogeneity

Simulações Computacionais dos Processos de Manufatura Aditiva de Metais: Um Review Introdutório

Two Heat Source Models to Simulate Welding Processes with Magnetic Deflection

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