Selaus avainsanan mukaan kokoelmassa "ultra-high-strength steel"Väitöskirjat
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Applications of the 4R method for the fatigue assessment of welded joints considering different steels, joint types, post-weld treatments, and load conditions
Acta Universitatis Lappeenrantaensis : 1172 (Lappeenranta-Lahti University of Technology LUT, 10.12.2024)The use of high-strength steels (HSS) and ultra-high-strength steels (UHSS) is a way to reduce the mass of a structure while increasing mechanical performance. However, a high strength-to-weight ratio does not guarantee ... -
Assessment of weld root fatigue strength of load-carrying fillet welded joints using notch stress approaches and finite element analysis
Acta Universitatis Lappeenrantaensis (Lappeenranta-Lahti University of Technology LUT, 21.11.2023)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 ... -
Dependence of manufacturing parameters on the performance quality of welded joints made of direct quenched ultra-high-strength steel
Acta Universitatis Lappeenrantaensis (Lappeenranta University of Technology, 29.09.2018)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 ... -
Numerical ductile fracture assessment of weldments in direct-quenched, ultra-highstrength steel
Acta Universitatis Lappeenrantaensis (Lappeenranta-Lahti University of Technology LUT, 01.12.2023)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 ... -
Stress components and local effects in the fatigue strength assessment of fillet weld joints made of ultra-high-strength steels
Acta Universitatis Lappeenrantaensis (Lappeenranta-Lahti University of Technology LUT, 04.12.2020)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 ...
