Related Experiment Video
Updated: Jul 16, 2025
09:17
Surrogate Model Development for Digital Experiments in Welding
Published on: March 28, 2025
1.0K
Numerical simulation and testing of laser-MIG hybrid-welding angle-structure sheets
Applied Optics
|September 14, 2023
Summary
This study numerically simulated and experimentally investigated laser-MIG hybrid welding of thin steel sheets. Results reveal thermal-fluid dynamics and microstructural features, enhancing weld quality and microhardness.
Area of Science:
- Materials Science
- Manufacturing Engineering
- Welding Technology
Background:
- Laser-MIG hybrid welding offers advantages for thin sheet metal fabrication.
- Understanding thermal-fluid dynamics is crucial for optimizing weld quality.
- SPCC steel is a common material in automotive and appliance manufacturing.
Purpose of the Study:
- To numerically simulate and experimentally investigate laser-MIG hybrid angle-welding of 1.5-mm-thin SPCC steel.
- To analyze the thermal-fluid phenomena and melt dynamic behaviors.
- To characterize the microstructure and microhardness of the welded joints.
Main Methods:
- Transient numerical simulation using a 3D heat source model.
- Experimental validation of simulation results.
- Microstructural analysis via scanning electron microscopy (SEM) and transmission electron microscopy (TEM).
Main Results:
- Simulation accurately predicted temperature distribution and molten pool dynamics.
- Observed semi-elliptical molten pool shape matched simulation.
- Finer microstructures in the weld bead due to rapid cooling, leading to improved microhardness.
- Columnar and equiaxed dendrites formed in peripheral and central regions, respectively.
Conclusions:
- Laser-MIG hybrid welding is effective for thin SPCC steel sheets.
- The study provides insights into thermal-fluid phenomena and microstructural evolution.
- Optimized welding parameters can enhance mechanical properties like microhardness.
