... through-wall volumetric HTHA damage progression by integrating Model 1 as a function of through-wall position and methane partial pressure. Model 3. Provides through-wall HTHA crack growth by correlating the effect of methane pressure at a crack tip to crack growth. inspection metals & mining...

... of rising displacement fracture toughness (FT) measurement and crack growth rate (CGR) measurement under constant stress intensity factor (K) to evaluate the SCC susceptibility of S13Cr and 17Cr oil country tubular goods (OCTG) materials. The results suggest that both methods provided a quantitative...

... and an adequate amount of absorbed hydrogen in both the SSR test and the accelerated fracture mechanics ISL and RD tests. These criteria are related to the measured threshold stress intensity factor for crack growth with cathodic polarization (K th ). The hydrogen embrittlement mechanism at the notch for a double...

... ABSTRACT Assessment of fatigue crack growth for pipelines is critical to evaluate the effects of operational pressures acting on flaws and predict the remaining service life. Under pressure cycling, cracks propagate continuously until they reach a critical size, resulting in a pipeline leak...

... Effect of Strain Rate on the Fatigue and Static Crack Growth Rate of UNS N07718 Under Cathodic Polarization Ramgopal Thodla DNV GL 5777 Frantz Road Dublin, OH - 43017 USA Brandon C. Rollins DNV GL 5777 Frantz Road Dublin, OH - 43017 USA Harrod M. Scott DNV GL 5777 Frantz Road Dublin, OH - 43017...

... was annealed and either peak-aged or over-aged to produce different strengths and precipitation conditions. The change in ductility, strength, and threshold stress intensity factor for crack growth due to hydrogen charging are compared. Over-aging resulted in superior SSR ductility ratios and higher threshold...

... Abstract Structure surfaces damaged by corrosion may develop stress concentrations which lead to initiation of cracks and possible crack growth. Simulation of the galvanic effects leading to corrosion takes account of the properties of the electrolyte as well as the structural materials...

... with the data of laboratory indicates that the new model can provide reasonable predictions for the dependence of the crack growth rates on the stress intensity factor, stress ratio, loading frequency, solution pH and electrochemical potential. INTRODUCTION Laboratory investigations and field observations...

... ABSTRACT: This paper describes the facilities for conducting crack growth rate (CGR) tests on neutron-irradiated alloys in LWR environments. A set of procedures were developed for using the facilities to test CGRs of neutron-irradiated stainless steel in the Irradiated Materials Testing...

... ABSTRACT: To better understand the irradiation assisted stress corrosion cracking (IASCC) mechanism and to establish strategies for IASCC mitigation, it is essential to acquire accurate crack growth data on neutron-irradiated alloys in the relevant environment. In this study, a crack growth...

... 77084 oilfield chemistry Corrosion Management weld metal crack length specimen Houston permission Andresen metals & mining hydraulic fracturing Publication Division crack growth conductivity manuscript fracture alloy 182 hydrogen sudden fracture rapid fracture South Creek Drive...

... growth rate, and total crack growth, were found strongly dependent on solution concentration: incubation time decreased with increasing NaCl concentration, while both initial crack growth rate and total crack growth increased with solution concentration. A linear relationship between initial crack growth...

... hydrogen concentration deaerated water Loading Rate alloy hydrogen fracture toughness crack growth shield gas hydrogen content hydrogen level specimen weld pad buildup environmental degradation resistance LTCP resistance displacement rate temperature deaerated water 2011 THE EFFECTS...

..., was investigated using a modified wedge opening loading (WOL) fracture mechanics specimens. The specimens were loaded with 95% of the yield strength. The resistance of crack growth and the corrosion were evaluated under different protection potentials (-850 and -650 mV). The used electrolytes were simulated soils...

... INTRODUCTION ABSTRACT The environmental effects on the susceptibility and crack growth of near-neutral pH stress corrosion cracking (SCC) were characterized using mechanical testing, hydrogen permeation and potential drop measurements. The investigated environmental parameters were dissolved...

... to determine the fracture resistance in sour environment. In this work, a simplified transient approach was developed to estimate the crack growth rate in double cantilever beam samples used in the NACE TM0177 standard method D. The evolution of the electrochemical solution-surface system was taken...

... flowline corrosion Production Chemistry Upstream Oil & Gas Pipeline Corrosion Subsurface Corrosion H2S management materials and corrosion riser corrosion Corrosion Management high level waste tank nitrite mechanism crack growth steel corrosion Corrosion Inhibition oilfield...

... of inspection intervals, and predicting the need for and timing for mitigation. The guidelines are being developed along mechanistic lines, and are broken down into four stages or modules representing: susceptibility to SCC, crack initiation, early-stage growth and dormancy, and crack growth to failure...

... observed after several tens of thousands of hours at 300°C. The effect of thermal aging on mechanical properties, including tensile, toughness, fatigue and static crack growth has been investigated at room temperature and in 288°C high purity water simulating BWR operating conditions. The measurement...

... ABSTRACT From various research work it is well known that a high resistance of polyethylene (PE) to slow crack growth (SCG) is decisive for the long-term behavior of heated tool butt welds. However, far less information is available about the extent to which this knowledge is transferable...