Thermo-mechanical controlled processing (TMCP) is employed to obtain the required level of mechanical properties contemporary high-strength low-alloy (HSLA) steel plates utilized for gas and oil pipeline production. The strength, deformation behavior resistance formation propagation running fractures are mainly determined by its microstructure crystallographic texture. These formed as a result ...

Externally bonded carbon-epoxy fiber-reinforced polymers (CFRPs) have been widely used to restore or increase the capacities of reinforced concrete beams (Meier et al., 1992; Neale and Labossière, 1997; Varastehpour and Hamelin, 1997). A typical reinforced concrete bridge deck may experience up to 7x10 stress cycles during the course of a 120year life span (Barnes and Mays, 1999), while an over...

In many applications that use high strength steels, structural integrity depends greatly on weld quality. Imperfections and the bead geometry are influencing factors mechanical properties of welded joints but, especially in fatigue strength, they cause a great decrease. The proper knowledge these two is important from nominal stress approach to fracture mechanics approaches. Studies concerning ...

To prevent members in steel bridges from fatigue failure, one usually needs to perform frequent periodic bridge inspections and employ detailed inspection methods. This is especially true for fracture-critical members or details. Carrying out these inspections puts a large burden on a transportation agency’s bridge maintenance budget. A systematic reliability-based method for inspection schedul...

Carburized Cr-Ni steel is widely used in the manufacture of components many fields due to excellent performance, which service life has been a concern. In order investigate high-cycle-fatigue and very-high-cycle-fatigue properties carburized gear steel, axial loading fatigue tests were performed by QBG-100 with stress ratios −1, 0 0.3. The Generalized Pareto distribution was evaluate inclusion ...

• S-N Curves and fractography in the very-high-cycle fatigue behavior of a pearlitic steel. Effects inclusion size stress ratio on Nanograins formation crack initiation region VHCF. The effects ( R ) (VHCF) steel were experimentally assessed. S – N curve under rotating bending loading exhibited horizontal asymptote shape clear limit. In contrast, ultrasonic axial continuously descending shape, ...

Studying the effect of notch on the fatigue behavior of structural materials is of significance for the reliability and safety designing of engineering structural components. In this work, we conducted notch fatigue experiments of two high-strength materials, i.e. a Ti32.8Zr30.2Ni5.3Cu9Be22.7 metallic glass (MG) and a 00Ni18Co15Mo8Ti ultra-high strength steel (CM400 UHSS), and compared their no...

A large percentage of the railway bridges in the UK rail network and around Europe are of riveted construction exceeding in many cases 100 years of age. The remaining fatigue life of these bridges is difficult to estimate due to the uncertainties regarding the fatigue behaviour of wrought-iron and older steel material, which was used for their construction, as well as the actual loading and the...