Hybrid Welding vs Conventional Welding: A Solution to Residual Stress and Distortion Mitigation?

2017 ◽  
Author(s):  
Sébastien Gallee ◽  
Rémi Lacroix ◽  
Vincent Robin ◽  
Florence Gommez ◽  
Erwan Jourden
Keyword(s):  
Residual Stress ◽  
Heat Source ◽  
Welding Process ◽  
Quality Standard ◽  
Experimental Measurements ◽  
Hybrid Welding ◽  
Mig Welding ◽  
Steel Sheets ◽  
Laser Heat Source ◽  
Process Productivity

The present paper deals with the hybrid laser/MIG welding process, which allows to assembly high thickness steel sheets. The laser heat source added to the MIG torch improves the process productivity while respecting quality standard. The multi-pass welding simulation of a plate is presented in this paper and numerical results are compared to experimental measurements (temperature and stresses).

Hybrid Welding: Investigation of the Induced Residual Stresses

2018 ◽  
Author(s):  
Sébastien Gallee ◽  
Vincent Robin ◽  
Florence Gommez ◽  
Erwan Jourden ◽  
Rémi Lacroix
Keyword(s):  
Heat Source ◽  
Residual Stresses ◽  
Welding Process ◽  
Quality Standard ◽  
Experimental Measurements ◽  
Hybrid Welding ◽  
Mig Welding ◽  
Steel Sheets ◽  
Laser Heat Source ◽  
Process Productivity

The present paper deals with the hybrid laser/MIG welding process, which allows to join high thickness steel sheets. The laser heat source added to the MIG torch improves the process productivity while respecting quality standard. The multi-pass welding simulation of a plate is presented in this paper and numerical results are compared to experimental measurements (temperature and stresses).

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.

Effect of shielding gas flow on welding process of laser-arc hybrid welding and MIG welding

2019 ◽  
Vol 38 ◽  
pp. 530-542 ◽  
Author(s):  
Xiaoyi Yang ◽  
Hui Chen ◽  
Zongtao Zhu ◽  
Chuang Cai ◽  
Chengzhu Zhang
Keyword(s):  
Gas Flow ◽  
Welding Process ◽  
Hybrid Welding ◽  
Mig Welding ◽  
Shielding Gas

Simulation on Temperature and Residual Stress Field of Laser-MIG Hybrid Welding of A6N01-T5 Alloy

2011 ◽  
Vol 399-401 ◽  
pp. 2040-2043 ◽  
Author(s):  
Da Li ◽  
Hua Ji ◽  
Yan Liu ◽  
Guo Qing Gou ◽  
Hui Chen ◽  
...  
Keyword(s):  
Residual Stress ◽  
Aluminum Alloy ◽  
Stress Field ◽  
Welded Joints ◽  
Hybrid Welding ◽  
Mig Welding ◽  
Residual Stress Field ◽  
Heat Cycling

MIG welding and laser-MIG hybrid welding have been widely used to joint aluminum alloy in recent years. Residual stress and heat cycling of MIG welding and laser-MIG hybrid welding are analyzed by SYSWELD software. The results show that the peak values of the stress in hybrid welding is 30~50% less than the results in the MIG welded joints.

Comparison of Residual Stress Between MIG Welding and Friction Stir Welding

2012 ◽  
Vol 155-156 ◽  
pp. 1218-1222
Author(s):  
Lei Wang ◽  
Mitsuyosi Tsunori
Keyword(s):  
Residual Stress ◽  
Friction Stir Welding ◽  
Stress Distribution ◽  
Yield Strength ◽  
Room Temperature ◽  
Welding Process ◽  
Residual Stress Distribution ◽  
Mig Welding ◽  
Friction Stir ◽  
Friction Stir Welding Process

Residual stress distribution plays a very important role in welded structures, the aim of present work is to find out the effect of different welding methods on the residual stress distribution by means of neutron diffraction measurements and FE models simulation. 4 mm thick DH-36 steel plates were butt welded by MIG welding process and 5 mm thick AA 2024 aluminium alloy plates were butt welded by friction stir welding process. Results show that residual stresses of MIG welding process are higher than those of friction stir welding process. The peak residual stress of MIG weld is close to the room temperature uniaxial yield strength of DH-36 while the peak residual stress of friction stir weld is just about 50% of the room temperature uniaxial yield strength of AA2024. The size effect of MIG welded and effect of welding speeds of friction stir welded on the residual stress distribution have also been studied in the paper.

scholarly journals The Effects of Different Gaps on the Weld Morphology, Microstructure and Residual Stress of AH36 Steel were Studied by Laser Arc Hybrid Welding

2022 ◽  
Vol 2160 (1) ◽  
pp. 012039
Author(s):  
Xiaoqi Hou ◽  
Xin Ye ◽  
Xiaoyan Qian ◽  
Haohao Jing ◽  
Peilei Zhang ◽  
...  
Keyword(s):  
Residual Stress ◽  
Process Parameters ◽  
Heat Affected Zone ◽  
Laser Power ◽  
Welding Process ◽  
Lower Surface ◽  
Thick Sheet ◽  
Hybrid Welding ◽  
Upper Bainite ◽  
Better Than

Abstract In this study, laser (TruDisk16002)-arc (MAG) hybrid welding was used to weld a 5mm thick sheet of AH36 steel with a gap of 0mm and 1mm. The results show that when the current of MAG is 205A, the voltage is 31.9V, and the laser power is 7.5KW, the welds of 0mm gap and 1mm gap are well formed, showing a typical nail shape, and the 0mm gap weld is better than 1mm. Under the same welding process parameters, the heat-affected zone of a 0mm gap weld is less than 1mm. Upper bainite is found in the 1mm weld gap structure. In the two gap cases, the residual stress on the lower surface is larger than that on the upper surface, and the residual stress in the 1mm weld gap is larger. The weldability of 0mm weld gap is better than 1mm.

Numerical Investigation on Interruption in the Welding Process Used in Shipbuilding

2015 ◽  
Vol 31 (04) ◽  
pp. 220-229
Author(s):  
Debabrata Podder ◽  
Sara Kenno ◽  
Sreekanta Das ◽  
Nisith Ranjan Mandal
Keyword(s):  
Residual Stress ◽  
Heat Source ◽  
Complex Geometry ◽  
Time Lag ◽  
Welding Process ◽  
Diffraction Method ◽  
Nonlinear Material ◽  
Fe Model ◽  
Temperature Dependent ◽  
Longitudinal Residual Stress

Interruptions in the welding process in shipbuilding are unavoidable because of complex geometry and human fatigue. This article presents an uncoupled three dimensional finite element (FE) modeling technique for bead-on-plate welding and an interruption in the welding process for low carbon and high notch toughness steel plate typically used in shipbuilding. The goal of the FE model was to successfully predict the effect of various time delays in the welding interruption on the residual stress distributions. The FE results are compared with the experimental results for the validation of the model. The experimental work was completed using the neutron diffraction method. The element birth-and-death algorithm was used in ANSYSW to simulate the filler metal deposition. A double ellipsoid heat source was used to simulate the heat source of the weld pool. The FE model considers the temperature dependent nonlinear material properties and uses the temperature-dependent combined coefficient of heat loss. The study found that weld interruptions in the welding process change the residual stress patterns and cause an increase in the maximum longitudinal tensile residual stresses. However, the maximum longitudinal compressive stress reduces as a result of interruptions in the weld process. This study found that a weld interruption duration of approximately 2 minutes is optimum for both fatigue and buckling strength. This study also analyzed the effect of preheat on longitudinal residual stress distribution and concluded that a suitable short time lag without any preheat is equivalent to preheat after a long welding interval.

MIG-Welding of Dissimilar Advanced High Strength Steel Sheets

2017 ◽  
Vol 885 ◽  
pp. 80-85 ◽  
Author(s):  
Eszter Kalácska ◽  
Kornél Májlinger ◽  
Enikő Réka Fábián ◽  
Pasquale Russo Spena
Keyword(s):  
Automobile Industry ◽  
Welding Process ◽  
High Strength Steels ◽  
High Strength ◽  
Tensile Specimen ◽  
Dissimilar Welding ◽  
Welding Parameters ◽  
Mig Welding ◽  
Advanced High Strength Steels ◽  
Steel Sheets

The need for steel materials with increasing strength is constantly growing. The main application of such advanced high strength steels (AHSS) is the automobile industry, therefore the welding process of different types of AHSSs in dissimilar welding joint was investigated. To simulate the mass production of thin steel sheet constructions (such as car bodies) automated metal inert gas (MIG) welding process was used to weld the TWIP (twinning induced plasticity) and TRIP (transformation induced plasticity) steel sheets together. The welding parameters were successfully optimized for butt welded joints. The joints were investigated by visual examination, tensile testing, quantitative metallography and hardness measurements. The TRIP steel side of the joints showed increased microhardness up to (450-500 HV0.1) through increased fraction of bainite and martensite. Macroscopically the tensile specimen showed ductile behaviour, they broke in the austenitic weld material.

CO2 Laser - MIG Hybrid Welding of Titanium Alloy

2011 ◽  
Vol 264-265 ◽  
pp. 1270-1280
Author(s):  
Marco Brandizzi ◽  
Annunziata Anna Satriano ◽  
Luigi Tricarico
Keyword(s):  
Titanium Alloy ◽  
Cross Section ◽  
Working Conditions ◽  
Welding Process ◽  
Inert Gas ◽  
Welding Parameters ◽  
Hybrid Welding ◽  
Mig Welding ◽  
Butt Welding ◽  
Gap Bridging

CO2 laser - Metal Inert Gas (MIG) hybrid welding process was investigated in the butt welding of Ti-6Al-4V titanium alloy sheets of 3.0mm in thickness. Using a Design of Experiment (DoE) approach, bead on plate tests were planned with the aim to analyze the effect of laser and laser-MIG welding parameters on the bead shape, hardness profiles in the weld cross section and welding efficiency. Butt welds performed in correspondence of the bead on plate working conditions which assure the complete penetration of the samples, the absence of undercuts and the maximum welding efficiency, confirm the results of the bead on plate tests and highlights the gap bridging ability of the hybrid welding process.

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