Numerical study of Heat Modes of laser welding of dissimilar metals with an intermediate insert

Abstract. A 3D model of laser welding proposed before by the authors was extended to the case of welding of metallic plates made of dissimilar materials with a composite multilayer intermediate insert. The model simulates heat transfer in the welded plates and takes into account phase transitions. It was proposed to select the composition of several metals and dimensions of the insert to avoid the formation of brittle intermetallic phases in the weld joint negatively affecting its strength properties. The model accounts for key physical phenomena occurring during the complex process of laser welding. It is capable to calculate temperature regimes at each point of the plates. The model can be used to select the welding parameters reducing the risk of formation of intermetallic plates. It can forecast the dimensions and crystalline structure of the solidified melt. Based on the proposed model a numerical algorithm was constructed. Simulations were carried out for the welding of titanium and steel plates with a composite insert comprising four different metals: copper and niobium (intermediate plates) with steel and titanium (outer plates). The insert is produced by explosion welding. Temperature fields and the processes of melting, evaporation, and solidification were studied.

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“…Various versions of the mathematical model of laser welding process presented here are described in detail in [2][3][4][5][6]12].…”

Section: Mathematical Model Overviewmentioning

confidence: 99%

“…Here, the model is created as an extension of the simulator described in [12][13][14] for the case of a composite insert. For each metal, melt in the weld pool, and solidified welding joint we use different thermal parameters in all the equations and boundary conditions.…”

Section: Introductionmentioning

confidence: 99%

Modeling of laser welding of steel and titanium plates with a composite insert

Isaev

Черепанов

Shapeev

2017

AIP Conference Proceedings

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“…В [39,40] различные варианты метода КНН применены для расчета напряженного состояния пластин из изотропных и анизо-тропных композиционных материалов. В [41] метод КНН приложен к решению за-дачи о продольных колебаниях бимодулярных балок, в [42] к решению уравнения Бюргерса и уравнения Кортевега-де Вриза-Бюргерса, в [27,43] к трехмерному моделированию лазерной сварки металлических пластин на адаптивных сетках в областях с криволинейной поверхностью.…”

Section: получена 15 августа 2016unclassified

On Combining Different Acceleration Techniques at the Iterative Solution of PDEs by the Method of Collocations and Least Residuals

Shapeev¹,

Vorozhtsov²

2017

Model. anal. inf. sist.

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“…These measurement methods can meet the requirements for small and medium-sized welded structural parts in the laboratory, but these methods are inaccurate and difficult to measure for the measurement of the residual stress of thick welded joints in nuclear power equipment in nuclear power plants. At present, for the study of welding residual stress, numerical simulation methods have IOP Publishing doi:10.1088/1742-6596/2383/1/012100 2 been widely recognized and applied due to their advantages of low cost and high speed [8][9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Welding Numerical Simulation Analysis of AP 1000 Insert Plate and Penetration Sleeves Based on ABAQUS

Yang¹,

Guo

Tang³

et al. 2022

J. Phys.: Conf. Ser.

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Frequently, cracks are found in welded joints of the insert plate assembly of a nuclear reactor containment vessel. To study the residual stress state of the dissimilar steel welded joint of the insert plate assembly and ensure that there are no defects after welding, the ABAQUS finite element analysis software was used to simulate the temperature field and the post-weld residual stress field of the dissimilar steel inserted into the plate assembly in the containment of the nuclear reactor. The insert plate and sleeve material are SA738GR.B and A350, respectively; the heat treatment process after welding is simulated to predict the residual stress state of the welded joint after heat treatment. The simulation results show that the weld zone is the most sensitive to the circumferential cracks, and the maximum residual stress appears near the weld toe near the tube side.

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Numerical study of Heat Modes of laser welding of dissimilar metals with an intermediate insert

Cited by 31 publications

References 10 publications

Modeling of laser welding of steel and titanium plates with a composite insert

Modeling of laser welding of steel and titanium plates with a composite insert

On Combining Different Acceleration Techniques at the Iterative Solution of PDEs by the Method of Collocations and Least Residuals

Welding Numerical Simulation Analysis of AP 1000 Insert Plate and Penetration Sleeves Based on ABAQUS

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