Effect of pre-strain on hydrogen embrittlement of high strength steels

To mitigate global warming, society must reduce greenhouse gas emissions. The transportation sector is one of the largest energy consumers and greenhouse gas emitters. One way to mitigate the emissions of this sector is to reduce the weight of vehicles using Advanced High Strength Steels (AHSS), particularly dual phase steels (DP). However,...

Brittle Fracture Micormechanisms of Heat Affected Zones of High Strength Steels

Thick-section high strength steels (HSS) are widely used in engineering applications with requirements of high toughness and strength. Structural components are commonly joined by welding, known to significantly degrade the mechanical properties of steel due to changes in microstructure (e.g., grain size coarsening and martensite-austenite (M-A)...

Effect of isoparametric grain refinement on mechanical properties and cleavage fracture toughness in high strength steels

In recent decades, high strength steels in thick sections have been increasingly used in offshore structures where they are subjected to harsh service conditions such as freezing temperatures and high static/dynamic loading. At these conditions they are susceptible to a transition from ductile failure to a dangerous brittle (cleavage)...

Experimental and numerical investigations on the structural performance of mild and high strength steel welded RHS X-joints

Higher strength steels (HSS) hollow sections with steel grades from S460 up to and including S700 are becoming increasingly competitive in long span structures. Reduction of self weight is accomplished with the smaller wall thickness of the hollow section, leading to fabrication, transport and execution benefits. The use of HSS has a positive...

High Strength Steel Structures – FEM Validation Experiments

The economical advantages of the use of S460 steel: Based on a comparison with lower strength steel

This master’s thesis is about the use of higher strength steel in buildings and the economical advantages of the use of this steel. The economical advantages are examined based on a comparison of similar designs with the use of the steel grades S355 and S460. The latter could in some cases result in large weight and cost savings. The costs are...