Invention Reference Number
91°µÍø and General Motors have developed a computational modeling tool that predicts residual stress and microstructural evolution in laser-welded joints made from dissimilar metals. This innovation addresses the challenge of crack formation and stress concentration during high-temperature joining processes. The tool supports process optimization to improve weld integrity, reduce manufacturing defects, and lower energy costs in industrial welding applications.
Description
The tool integrates a thermo-mechanical modeling framework with a comprehensive material behavior database to simulate stress and phase evolution in welded components. Using a custom modeling approach executed in commercial finite element software, the tool accounts for key factors influencing weld performance – such as phase transformation and temperature-dependent material properties. Applicable to joints involving a variety of industrial alloys, this modeling method significantly enhances prediction accuracy for residual stress fields and supports virtual design iterations. The technology has been validated against empirical data, offering an advanced alternative to time-consuming experimental testing.
Benefits
- Reduces trial-and-error in welding process design
- Enables more robust dissimilar metal welds
- Minimizes residual stress and distortion risks
Applications and Industries
- Automotive manufacturing and lightweighting
- Industrial welding and joining processes
Contact
To learn more about this technology, email partnerships@ornl.gov or call 865-574-1051.
