... steel strands, and the relationship between stress state and hydrogen content distribution on strength reduction. Bridge Cold-drawn steel Diffusion Fracture Galvanizing Hydrogen embrittlement Mechanism Prestressing failure Pearlite Tendon INTRODUCTION Cold-drawn pearlitic steel wire is used...

..., hydrotest and in-service failure data. Statistical analyses are performed to demonstrate the mathematical form of the new model are valid. Failure pressure predictions are shown to be comparable or better than current industry models. fracture corrosion management stress corrosion cracking risk...

... a methodology that can be extended to other materials and service conditions for which the necessary data are available. stress corrosion cracking fitness for service assessment chloride stress corrosion cracking caustic stress corrosion cracking remaining life fracture standardization INTRODUCTION...

...Abstract Pipe fracture performance often becomes one of the governing factors in the tubular design and material selection for OCTG (Oil Country Tubular Goods) steel pipes used in the sour (H₂S) service environments. API TR 5C3 Annex D [ 1 ] provides equations for calculating pipe...

...Abstract Recent project experiences in the Arabian Gulf Region have shown that weld fracture is the governing limit state for subsea pipelines subject to lateral buckling loads. This is due to the small axial strain limits which can be allowed to minimize impact on weld repair rate for offshore...

... an analytical modeling approach that projects initial occurrence and subsequent progression rate of wire and strand fractures and tendon failures, given statistics that characterize wire corrosion rate. The present study builds upon this model by considering and incorporating, first, fractures/failures arising...

... or free sulfates (or both) and the latter voids with free water, and soft, chalky, segregated, separated grout. In response to this, a methodology has been developed whereby timing of an initial wire and strand fractures and tendon failure can be projected and then rate of subsequent fractures/failures...

... service test solution contained either 40ppm or 1000ppm of a water soluble corrosion inhibitor. The fracture mechanics samples were the working electrode and were isolated from the clevises and test cell using ceramic coated pins. The tested environmental conditions are listed below: NaCl (wt...

... sulfates (or both) and the latter voids with free water, and soft, chalky, segregated, separated grout. The present paper reviews a predictive model that was developed to project the onset and subsequent rate of wire and strand fractures and tendon failures as a function of time, given information...

... of the original wire cross section area that remained at the most corroded location, which is where fracture occurred, and reveals a linear decrease in wire strength with increasing cross section loss. The corrosion morphology for these wires consisted of crater-like depressions similar to what has been reported...

... below. Inerts like Ar, N₂ and CH₄ influence the likelihood of running ductile fracture (discussed below). A more detailed analysis of various impurities is given in the section on the effect of CO₂ composition below. Internal Corrosion Due to O₂ Degradation...

... inspection, eddy current and dye penetrant inspection, are reviewed in relation to their detection limits for inspecting titanium welds. The performance of welded titanium alloys, in seawater and oil and gas production environments, is discussed. This includes the corrosion, fatigue, fracture toughness...

...Abstract A discharge screw element (DSE) A in a polyethylene resin extruder was found fractured after excessive temperature excursion and main motor power spike were experienced. An investigation was subsequently conducted to understand the root causes of the failure; determine the construction...

... at or near midplane. Because they impede and delay crack growth to a time of weaker acidity, large and/or numerous edge cracks give false high values of sulfide fracture toughness, K_Issc. A correlation is presented between the incidence of serious edge cracking and both hardness and the amount...

...TiAl Numerous studies have been reported of the fracture and fatigue crack growth resistance of TiAl alloys^{( 1 - 5 )}. These have shown that while toughness and ductility are highest with a duplex, two phase structure, better resistance to fatigue crack growth is shown by lamellar...

... layer would be very thin and during hot rolling it would become part of the adjacent carbon steel. Hence, it would not be discernible in the microstructure of these steels. Figure 7 shows the microstructure of the steel at one of the field fractures. In addition to the primary fracture, there were...

...The NDT temperature is adjusted to 200°F (93°C) if the vessel steel is temper embrittled. Based on an API investigation ⁵ , Cr-Mo steels that have been heated over 750°F (399°C) over 15 years are likely to have lost the original fracture toughness. The NDT is also adjusted...