Fatigue and Mechanical Properties of Laser-Welded Steels
A special issue of Metals (ISSN 2075-4701). This special issue belongs to the section "Metal Failure Analysis".
Deadline for manuscript submissions: closed (31 January 2024) | Viewed by 183
Special Issue Editor
Interests: fatigue life; fatigue cracks; fracture mechanics; mechanical properties; microstructure; defects; residual stresses; crack closure
Special Issues, Collections and Topics in MDPI journals
Special Issue Information
Dear Colleagues,
This Special Issue will collect interesting articles exploring the fatigue and mechanical properties of laser-welded steels. In numerous works, a good correlation was found between the microstructural features of the weld joints and their mechanical properties. Potential topics include (but are not limited to) the characteristics of laser welding, features of the main lasers used for welding, factors affecting weld penetration, laser welding phenomena and melt flows in a molten pool during laser welding. Thanks to recent advances in laser beam quality, higher laser power and better availability of laser technologies, lasers can now be used for a range of applications. For example, effective welding of materials with fairly high thickness enables to the application laser welding in power generation or gas storage.
Laser welded structures are often subjected to cyclic loading conditions. Fatigue cracks are usually initiated from the natural crack or notch tips of lap joints. The mechanical properties mismatch between the weld and base material can significantly reduce the fatigue life. Residual stresses in the welds and fusion zones can affect fatigue life. Additionally, the role of residual stresses is sometimes overestimated. Residual stresses represent local static prestress and do not affect the stress amplitude. However, they affect fatigue crack closure, playing an important role in crack-like weld defects or stress corrosion mechanisms and hydrogen-induced cracking. Therefore, contributions on residual stresses connected with laser welds are also welcome.
Dr. Ivo Černý
Guest Editor
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Keywords
- laser welding
- fatigue life
- mechanical properties
- microstructure
- weld defects
- residual stresses
- crack closure
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