Showing papers on "Stress corrosion cracking published in 2009"
TL;DR: In this paper, the role of grain boundary character and crystallographic texture on the intergranular stress corrosion cracking (IGSCC) of API X-65 pipeline steel has been studied using scanning electron microscope (SEM) based electron backscattered diffraction (EBSD) and X-ray texture measurements.
206 citations
TL;DR: In this paper, the combined effect of an externally-applied mechanical stress to bend the device and the corrosive environment provided by the acid is investigated in a flexible optoelectronic devices.
139 citations
TL;DR: In this article, the effect of inclusions on the initiation of stress corrosion cracking (SCC) X70 pipeline steel was investigated in an acidic soil solution using slow strain rate test, scanning electron microscopy and energy-dispersive X-ray techniques.
139 citations
TL;DR: In this paper, a multi-scale study of stress corrosion cracking in cold-worked 304 type stainless steels, which are widely used in pressurized water reactors and boiling water reactors, has been examined.
133 citations
TL;DR: In this paper, the local corrosion behavior of welded X70 pipeline steel in near-neutral pH solution was studied by micro-electrochemical measurements, including scanning vibrating electrode and local electrochemical impedance spectroscopy.
129 citations
TL;DR: In this article, a local additional potential model (LAPM) was developed to illustrate the critical role of strain rate in SCC of X70 pipeline steel in an acidic soil solution was investigated by slow strain rate test, surface characterization, potentiodynamic polarization curve measurement and electrochemical hydrogen permeation technique.
119 citations
TL;DR: In this article, the mechano-electrochemical effects of deformation and hydrogen on active dissolution of pipeline steel in near-neutral pH groundwater are described, and it is shown that the free energy increment due to elastic deformation is insufficient to alter active dissolution rate remarkably.
101 citations
TL;DR: In this paper, the effects of surface treatment techniques like laser and shot peening on SCC susceptibility of friction stir welded (FSW) 7075 aluminum alloy joints were investigated.
101 citations
TL;DR: The stress corrosion cracking susceptibility of X80 steel under applied cathodic potentials in a simulated soil solution was investigated using slow strain rate tensile tests in this article, where the fracture surfaces were observed by scanning electron microscopy.
91 citations
TL;DR: In this article, the effect of Cr, Yb and Zr additions on localized corrosion of Al-Zn-Mg-Cu alloy has been investigated, and the results showed that the unrecrystallized Al−Zn−Mg−Cu alloy exhibited higher resistance to stress corrosion cracking and exfoliation corrosion.
91 citations
TL;DR: In this paper, the local anodic dissolution behavior of smooth and pre-cracked X70 pipeline steel specimens under applied tensile stress was investigated by micro-electrochemical measurements and numerical simulation.
TL;DR: In this article, an advanced transmission electron microscopy technique was used to investigate stress corrosion cracking in Alloy 600 U-bend samples exposed in simulated PWR primary water at 330 °C.
TL;DR: The effect of pre-strain on the microstructure and stress corrosion cracking of over-aged 7050 aluminum alloy was investigated in this article, where the eta-(MgZn(2)) phase was the main precipitates.
TL;DR: In this article, the influence of a high fraction of special grain boundaries on the intergranular stress corrosion cracking susceptibility of 316L stainless steel and nickel base alloy 690 in supercritical water was evaluated.
TL;DR: Several cases of ceiling collapses and other failed elements have been reported in indoor swimming pool halls in the last two decades as discussed by the authors, which were caused by stress corrosion crack in the ceiling.
Abstract: Several cases of ceiling collapses and other failed elements have been reported in indoor swimming pool halls in the last two decades. The collapses were caused by stress corrosion crackin...
TL;DR: In this article, a preliminary mathematical model based on deterministic equations with statistically variable input parameters was developed for simulating the evolution of the pit depth distribution at different exposure times, and the transformation to stress corrosion cracks was based on the Kondo criteria.
TL;DR: In this paper, a coupled approach able to account for the interaction between environment and plasticity in a polycrystalline material was developed for the modeling of iodine-assisted stress corrosion cracking in Zircaloy tubes used in nuclear power plants.
TL;DR: In this paper, an experimental study of the stress corrosion cracking (SCC) process on 8mm-diameter wires which are used industrially in precast concrete prestressed by pre-tension is presented.
TL;DR: In this paper, the influence of metallurgy using a range of existing rock bolt steels and (2) commercial steels varied considerably. But the results showed that steel microstructures (pearlitic-ferritic and tempered martensite) had similar resistance to SCC and HE in the most aggressive conditions (pH 2.1 and −1500mVSCE).
TL;DR: In this article, a fundamentally based mathematical model was developed with the goal to predict, as a first step, the crack growth rate (CGR) of high pH stress corrosion cracking (SCC) of buried steel pipelines.
TL;DR: In this article, a film rupture model for aqueous stress corrosion cracking is developed and used to predict kinetics of crack growth under constant and variable stress intensity factor, and the model predicts that creep is necessary for sustained crack growth and creep rate limits crack velocity for constant K and dK/da loading.
TL;DR: In this paper, the initiation of stress corrosion cracking in fcc Fe-Cr-Ni ternary alloys was studied by means of quantum chemical molecular dynamics at 288°C.
TL;DR: A systematic study was carried out to understand the effect of ethanol chemistry (chloride, water, pHe, and oxygen level) as well as other controlling parameters on the stress corrosion cr...
Abstract: A systematic study was carried out to understand the effect of ethanol chemistry (chloride, water, pHe, and oxygen level) as well as other controlling parameters on the stress corrosion cr...
TL;DR: In this paper, the authors reviewed corrosion related issues of Ni-Cr-Fe based and Ni-Cu based steam generator tube materials for nuclear power plants along with some updated information on corrosion research.
TL;DR: In this article, the impact of water saturation on the static fatigue of polycrystalline porous rock (iron ore) was studied by performing multistep uniaxial creep tests under partially saturated conditions.
Abstract: [1] Static fatigue of a polycrystalline porous rock (iron ore) was studied by performing multistep uniaxial creep tests under partially saturated conditions, and the impact of water saturation on creep was analyzed. Recorded strains and acoustic emissions (AE) show that water saturation induces a strong increase in AE activity and dilatant inelastic volumetric strain and a decrease in Young’s modulus and in the b value of the GutenbergRichter law (i.e., the relative number of large-amplitude events increases) as the rock approaches failure, indicating that microfracturing plays an important role in the creep process. Water saturation accelerates static fatigue through hydromechanical coupling and subcritical stress corrosion cracking. The chemical reactions involved in the corrosion of iron ore and leading to a decrease in its intrinsic mechanical properties are described. These reactions play a major role in the static fatigue of iron ore, which on a large scale is probably the main mechanism explaining certain collapses in underground iron mines. It is also shown that creep straining of iron ore is reversible after stress removal, indicating that it results also from a time-dependent viscoplastic mechanism (i.e., dislocation creep).
TL;DR: In this paper, a thorough mechanical, corrosion-mechanical, hydrogen permeation studies of X52 steel in as-received condition and after 30 years of service in gas pipeline have shown the degradation of the bulk metal properties due to the exploitation.
Abstract: The thorough mechanical, corrosion-mechanical, hydrogen permeation studies of X52 steel in as-received condition and after 30 years of service in gas pipeline have shown the degradation of the bulk metal properties due to the exploitation. The structure degradation of exploited steels decreased the resistance to crack propagation, to stress corrosion cracking (SCC), HE and HIBC. The exploited steel exhibited specific anomalies of mechanical behaviour: (1) decrease in resistance to brittle fracture with simultaneous decrease in hardness; and (2) the opposite change of the plasticity parameters: decrease in the RA accompanied by the increase in elongation. Deformation ageing and formation of micro defects, assisted by entering and accumulated hydrogen evolved in corrosion processes which takes place in brine deposited inside the pipes, have been proposed to be responsible for the metal degradation and specific modification of the properties during the long-term service of pipes. The extent of the steel degradation not being able to be detected by the standardized mechanical properties and routine microstructure observation can be efficiently determined by the specially modified methods and conditions. The information may be used in assessment of the conditions and of the life-time of operated and newly constructed gas pipelines.
TL;DR: In this paper, the authors investigated the sensitivity of 304H stainless steel to stress corrosion cracking and found that the sensitivity increased with increasing sensitization time and temperature, which was confirmed by microstructure examination after EPR test.
TL;DR: In this paper, a crack layer theory model is adopted to describe the individual stress corrosion (SC) crack propagation kinetics and the time interval from crack initiation to instability and break through, and the effect of localized chemical degradation at the crack tip on SC crack growth kinetics is addressed.
TL;DR: In this paper, the effect of a slight modification of the composition of a standard grade has been studied in order to improve the behavior of high-strength steels for drill collars in sour environment.
TL;DR: In this article, the authors identify domains where the interactions between mechanical, environmental and microstructural parameters may occur during corrosion fatigue crack growth in the aluminum alloy 2024, and evaluate the possible contribution of this type of damage during fracture growth.