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Dependence of manufacturing parameters on the performance quality of welded joints made of direct quenched ultra-high-strength steel
(Lappeenranta University of Technology, 2018-09-29)
The use of ultra-high-strength steels (UHSS) has increased in the engineering industry during past decades especially in the fields of welded structural applications where products are required to possess a specific ...
Stress components and local effects in the fatigue strength assessment of fillet weld joints made of ultra-high-strength steels
(Lappeenranta-Lahti University of Technology LUT, 2020-12-04)
Ultra-high-strength steels (UHSSs) enable a significant reduction in material usage compared to mild steels and, thus, provide energy-efficient solutions for structural applications. In welded steel components, an increase ...
Numerical ductile fracture assessment of weldments in direct-quenched, ultra-highstrength steel
(Lappeenranta-Lahti University of Technology LUT, 2023-12-01)
Many studies conducted in recent years have raised concerns about the ultimate loadcarrying and elongation capacities of weldments made of direct-quenched, ultra-highstrength steels (UHSS). The reason for this is the ...
Assessment of weld root fatigue strength of load-carrying fillet welded joints using notch stress approaches and finite element analysis
(Lappeenranta-Lahti University of Technology LUT, 2023-11-21)
This thesis uses nominal and notch stress concepts to evaluate the fatigue strength of loadcarrying fillet welded joints (LCFWJs) made of high-strength steel. The study investigates the effect of different reference radii ...