Finite-Element Analysis of Heat Generation by Plasma in Welding Temperature Field of Stainless Steel

2011 ◽  
Vol 383-390 ◽  
pp. 6728-6734
Author(s):  
A. Moarrefzadeh ◽  
M.R.Isvand Zibaei
Keyword(s):  
Stainless Steel ◽  
Temperature Field ◽  
Heat Source ◽  
Arc Welding ◽  
Welding Process ◽  
Source Model ◽  
Temperature Fields ◽  
Element Analysis ◽  
Welding Temperature ◽  
Source Models

In this paper, the plasma arc welding is studied and stainless steel temperature field is gained in this process. The available heat source models, either planar one like Gaussian or body ones like double-ellipsoidal and rotary Gaussian modes, are unable to describe the keyhole PAW process accurately. Based on the configuration feature of keyhole PAW welds, a combined heat source model is proposed for the numerical analysis of temperature fields in keyhole PAW process. Numerical simulation of welding process in SIMPELC method and by ANSYS software for gaining the temperature field of stainless steel, the effect of parameter variation on temperature field and process optimization for different cases of plasma and shielding gases(Argon, Helium), are done.

Heat Source Model of Lap Laser Welding of Stainless Steel Vehicle

2011 ◽  
Vol 121-126 ◽  
pp. 3347-3351 ◽  
Author(s):  
Hong Xiao Wang ◽  
Chun Sheng Wang ◽  
Chun Yuan Shi ◽  
Zhi Yi Huang
Keyword(s):  
Stainless Steel ◽  
Heat Source ◽  
Laser Welding ◽  
Process Parameters ◽  
Production Efficiency ◽  
Three Dimensional ◽  
Source Model ◽  
Heat Source Model ◽  
Element Analysis ◽  
Welding Temperature

Resistance spot welding (RSW) is being taken place by partial lap laser welding for the poor surface quality and bad airtight due to the pressure of electrodes. The shape of partial lap laser welding is similar to the vase. When the penetration of the joint is in a certain range, there is no welding trace on the outer surface. Laser welding temperature field numerical analysis based on Abaqus finite element analysis software is committed to obtain a suitable range of process parameters to improve production efficiency and automation by determining the joint penetration. To master the laser lap welding of stainless steel weld penetration state, the combination of three-dimensional positive cone + three-dimensional inverted cone + half-ellipsoid heat source model was established simulating stainless steel lap laser weld pool shape and forecasting the range of process parameters .

Effects of Heat Source Model and Welding Speed on Welding Temperature Field for a Plan Carbon Steel Plant

2014 ◽  
Vol 488-489 ◽  
pp. 83-89 ◽  
Author(s):  
Z.K. Song ◽  
Z.Y. Li ◽  
J. Xu ◽  
Y.C. Sun
Keyword(s):  
Temperature Field ◽  
Carbon Steel ◽  
Heat Source ◽  
Welding Speed ◽  
Heat Input ◽  
Source Parameters ◽  
Source Model ◽  
Heat Source Model ◽  
Element Analysis ◽  
Welding Temperature

This article studies the effects of heat source shape parameter and welding speed on the evolution of welding temperature field for Q345 plan carbon steel. The heat input and heat source parameters as well as the welding speed are defined by applying DFLUX subroutine in ABAQUS to simulate the transient welding temperature. The effects of heat resource shape parameters and heat input as well as the welding speed on welding temperature field are investigated by means of finite element analysis. It has been found that heat source parameters and welding speed show strong influence on temperature distribution in FZ (fusion zone) and HAZ (heat-affected zone). Meanwhile, it shows a roughly linear relationship between the changes of heat input and the highest temperature.

Temperature Simulation of Aluminium Alloy Double-Arc Welding Process on Simplified Conditions

2013 ◽  
Vol 661 ◽  
pp. 158-161
Author(s):  
Guo Hong Ma ◽  
Zhao Yang Zhang ◽  
Jia Ye
Keyword(s):  
Temperature Field ◽  
Heat Source ◽  
Arc Welding ◽  
Welding Process ◽  
Source Model ◽  
Heat Source Model ◽  
Finite Element Software ◽  
Single Arc ◽  
Forming Characteristics ◽  
Arc Welding Process

In this paper we used ANSYS finite element software to simulate the temperature field in 7a52 aluminum alloy double-arc welding process and analyze the welding seam's forming characteristics. We conducted the welding temperature field numerical simulation in the same welding seam forming conditions by loading heat source of single-arc and double-arc separately, which used gauss heat source model and used voltage, welding current and speed as key parameters. The experiments indicated that the designed double-arc heat source model could generally represent the double-arc welding process. Compared with single-arc welding process, the double-arc welding had higher welding efficiency and narrower heat affected zone. Furthermore, the temperature of double-arc welding pool raised faster. All these advantages could improve the welding efficiency.

Gas Tungsten Arc Welding and Hybrid Laser-TIG Welding Temperature Field Analysis of AZ31B Magnesium Alloy

2008 ◽  
Vol 575-578 ◽  
pp. 837-842 ◽  
Author(s):  
Guo Li Liang ◽  
Shao Qiang Yuan ◽  
Guang Tao Zhou ◽  
Xiao Dong Sun ◽  
Yu Mang
Keyword(s):  
Temperature Field ◽  
Magnesium Alloy ◽  
Heat Source ◽  
Arc Welding ◽  
Source Model ◽  
Tig Welding ◽  
Hybrid Welding ◽  
Heat Source Model ◽  
Welding Temperature ◽  
Gas Tungsten Arc

In this particular work, the moving Gauss heat source model based on the gas tungsten arc welding and a new heat source model based on the laser-TIG hybrid welding were developed by the finite element analysis according to the physical characteristic of the TIG welding and the laser-TIG hybrid welding, Taking into account the advice of parameter modification, the modeling was respectively carried out by the single TIG and the laser-TIG hybrid welding for AZ31B magnesium alloy. The welding temperature field and the weld cross-section geometry were simulated separately with regard to dependence on the single TIG and the laser-TIG hybrid welding. Comparing the experimentally measured value with simulated value of the weld section geometry, the simulated and the experimentally determined weld section geometry by the single TIG welding and the hybrid welding showed a good agreement, at the same time, the microstructures of the joint were also discussed respectively.

Numerical simulation of flow field in the Invar alloy laser–MIG hybrid welding pool based on different heat source models

2018 ◽  
Vol 28 (4) ◽  
pp. 909-926 ◽  
Author(s):  
Xiaohong Zhan ◽  
Qi Zhang ◽  
Qibing Wang ◽  
Jie Chen ◽  
Hongbing Liu ◽  
...  
Keyword(s):  
Flow Field ◽  
Heat Source ◽  
Welding Process ◽  
Source Model ◽  
Invar Alloy ◽  
Heat Sources ◽  
Hybrid Welding ◽  
Mig Welding ◽  
Content Type ◽  
Source Models

Purpose The purpose of this paper is to establish a three-dimensional flow field model of the Invar alloy laser–metal inert gas (laser–MIG) hybrid welding process to investigate the influence of different heat sources between different layers and to analyze the flow field based on the two different heat source models for the multilayer welding. Design/methodology/approach The Invar steel plates with 19.5 mm thickness are welded into three layers’ seam using the hybrid laser–MIG welding technology. The flow field based on different heat source models is studied and then used to investigate the influence of different heat sources in different layers during the laser–MIG hybrid welding process. The simulation results of flow field using two different heat source models are compared with experiments. Findings The flow field simulations results show that using the Gaussian rotating body heat source model to simulate the temperature field is more consistent with the experiment of the hybrid laser–MIG welding where its flow field between different layers better reflects the characteristics of the hybrid laser–MIG welding. Originality/value The findings will be useful in the study of a variety of thick-plate laser–MIG hybrid welding process fluid flows.

Numerical Simulation of CO2 Welding 409 Stainless Steel Multi-Crossed Parts

2013 ◽  
Vol 785-786 ◽  
pp. 989-992
Author(s):  
Ge Wang Shuai ◽  
You Li ◽  
Ping Fang
Keyword(s):  
Stainless Steel ◽  
Heat Source ◽  
Arc Welding ◽  
Source Model ◽  
Heat Source Model ◽  
Transient Stress ◽  
Co2 Welding ◽  
Stress And Deformation ◽  
Welding Sequences ◽  
Residual Stress And Deformation

A dynamic 3D thermal and mechanical Simulation of CO2 welding 409 stainless steel multi-Crossed parts was carried out by using the software SYSWELD. A double ellipsoid heat source model of CO2 arc welding was explored and fitted with the Heat Source Fitting tool. The transient stress and strain fields of 409 stainless steel multi-crossed weld joint under two kind of welding sequences were obtained by loading the simulated temperature field, which helps to decrease the residual stress and deformation of 409 stainless steel multi-Crossed parts welding.

Welding Process Development for Spent Nuclear Fuel Canister Repair

2019 ◽  
Author(s):  
Wei Tang ◽  
Stylianos Chatzidakis ◽  
Roger Miller ◽  
Jian Chen ◽  
Doug Kyle ◽  
...  
Keyword(s):  
Residual Stress ◽  
Stainless Steel ◽  
Nuclear Fuel ◽  
Arc Welding ◽  
Spent Nuclear Fuel ◽  
Welding Process ◽  
Tensile Residual Stress ◽  
304L Stainless Steel ◽  
Welding Temperature ◽  
Stress Direction

Abstract The potential for stress corrosion cracking (SCC) of welded stainless-steel interim storage containers for spent nuclear fuel (SNF) has been identified as a high priority data gap. This paper presents a fusion welding process that was developed for SNF canister repair. Submerged arc welding (SAW) was developed to weld 12.7 mm (0.5 in.) thick 304L stainless steel plates to simulate the initial welds on SNF canisters. The SAW procedure was qualified following ASME Boiler and Pressure Vessel Code requirements. During SAW, the welding temperature was recorded at various locations by using thermocouples. After SAW, weld microstructures were characterized, joint mechanical properties were tested, and the maximum tensile residual stress direction was identified. After SAW procedure qualification, artificial cracks were excavated perpendicular to the maximum tensile residual stress direction in the SAW heat affected zone. Machine cold-wire gas tungsten arc welding (CW-GTAW) was developed and used for repair welding at cracked locations.

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