... N06690 (alloy 690) intergranular stress corrosion cracking crack initiation cold work cavities INTRODUCTION Ni-base Alloys 600 and 690 are widely used in pressurized water reactor (PWR) pressure boundary components. Alloy 600 was originally chosen for its excellent corrosion resistance in high...

.... This CW material with high boron and low carbon bulk concentrations was found to be highly susceptible to SCC. Consistent SCC initiation times were obtained at both temperatures and the thermal activation energy for SCC initiation is estimated at ~116 kJ/mol. intergranular stress corrosion cracking crack...

... role in crack nucleation. This paper provides an overview of the evolution of GB cavities and will discuss their effects on crack initiation in CW UNS N06690. intergranular stress corrosion cracking crack initiation UNS N06690 (alloy 690) cold work creep cavities grain boundary microstructure...

...Abstract Reduction of electrochemical corrosion potential (ECP) of Boiling Water Reactor (BWR) vessel and internals is essential for mitigating intergranular stress corrosion cracking (IGSCC). Hydrogen water chemistry in moderate concentrations (HWC-M) or at reduced injection rates with noble...

...’, in order to gain confidence in full resistance to IGSCC after a PWHT. Abstract Weldable Martensitic Stainless Steel (WMSS) line pipe can be susceptible to internal Intergranular Stress Corrosion Cracking (IGSCC) in the Heat Affected Zone (HAZ) of welds when exposed to hydrocarbon transport environments...

...Abstract Electrochemical behavior of supermartensitic stainless steel was discussed in order to evaluate the susceptibility to intergranular stress corrosion cracking (IGSCC) of supermartensitic stainless steel (SMSS) subjected to girth welding. Electrochemical potentiokinetic reactivation (EPR...

... by control of the welding process alone, although brief PWHT offers a practical means of avoiding IGSCC. Supermartensitic stainless steel intergranular stress corrosion cracking post weld heat treatment Weld Characterisation Examination of the thermal cycles revealed that fairly high interpass...

... to intergranular stress corrosion cracking (IGSCC) in the heat affected zone (HAZ) of the girth welds was also reported^{[ 4 ]}. Both SMSS tubes made with superduplex (SDSS) filler metal and with matching filler metal had shown cracking (including secondary cracking in case of SDSS) at the heat affected...

... of grain boundary sensitization on the intergranular Stress Corrosion Cracking resistance of heat affected zones in welded supermartensitic stainless steels have been studied. Slow strain rate tensile tests are performed on specimen sampled across multiple-pass welds. The effects of the carbon content...

... found in laboratory tests, there is some concern about the integrity of weldable martensitic stainless steel (WMSS)¹ pipelines that are currently operated. In this paper, the susceptibility of WMSS to intergranular stress corrosion cracking (IGSCC) cracking in the heat-affected zone (HAZ...

... results concerning grain boundary carbide precipitation and resistance to intergranular stress corrosion cracking. This reiterates the complex nature of materials and damage mechanisms, identifying yet another ‘exception to the rule’. Finally, this paper discusses the necessary compromise between fracture...

... of four- point bend (FPB) testing at 160°C. The test program involved pre-qualification, a robustness study of the post weld heat treatment (PWHT) procedure, welding procedure qualification, and finally a longterm test. The main concern was intergranular stress corrosion cracking (IGSCC). IGSCC...

... (i.e., models whose prediction are constrained explicitly by the natural laws). Intergranular Stress Corrosion Cracking (IGSCC) under normal BWR operating conditions (T = 288°C, pure water) is primarily an electrochemical process that occurs at potentials that are more positive than a critical value...

...Abstract The intergranular stress corrosion cracking (IGSCC) of alloy 600 (UNS N06600) in high temperature water depends upon the microstructure and particularly upon the grain boundary composition and the intergranular carbide distribution. However, has been found that the presence of dissolved...

...), and microstructural characteristics were analyzed by scanning and transmission electron microscopies. The material deformed significantly by twinning and exhibited surprisingly high ductility in air, but was susceptible to severe intergranular stress corrosion cracking (IGSCC) at high ECP. Low levels of dissolved O...

... initiative. The lessons learned from this effort will be applied to pressurized water reactor (PWR) internals cracking issues. boiling water reactor BWR internals Nuclear Regulatory Commission NRC pressurized water reactor PWR intergranular stress corrosion cracking IGSCC INTRODUCTION...

... been attributed to classical intergranular stress corrosion cracking (IGSCC) of thermally sensitized SS, in which significant grain-boundary carbide precipitation occurs in the heat-affected zone (HAZ) during welding or sensitizing heat treatment. However, an increasing number of cracking incidents...

...) with no increase in MSLRM response above the background level. Thus, after NMCA treatment, IGSCC protection has been achieved at low levels of hydrogen addition with no increase in operating dose rates. A similar behavior was also observed for the upper core location. intergranular stress corrosion cracking noble...

... the importance of both stress and temperature and indicate a restricted temperature region within which corrosion is most severe. supercritical water oxidation high temperature corrosion Alloy C-276 dealloying stress corrosion cracking intergranular corrosion intergranular stress corrosion cracking...

... to intergranular cracking or vice versa occur are topics of much debate and research. Some recent work have suggested that the mechanism of trans and intergranular stress corrosion cracking are identical. In this study, by using the load pulsing technique, it has been determined that the velocity in intergranular...