..., the alloy chemistry, microstructural cleanliness, cold reduction, residual stress orientation, and stress corrosion cracking susceptibility of the finished tubulars must be considered. Also, flow formers have reported issues related to the formation of defects at cold work levels well below the alloy’s...

...But it is also believed that the rotary straightening process, at end of this pipe manufacturing process, introduces most of the residual stresses in the pipe. Pipe can be straightened either by hot straightening or cold straightening process, while the former process normally generates...

... testing, and finite element analyses were conducted. This work has demonstrated that both stress and strain-based approaches of DNV RP F112: 2008 can be overly conservative. Duplex Stainless Steel HISC Critical Stress/strain Residual Stress INTRODUCTION Ferritic-austenitic (duplex) stainless steels...

... ). The four point bend test method can be un-representative of the material in service, since all faces of the specimens are exposed to the hydrogen-charging environment and the as-manufactured bore and weld root surface is often removed during the preparation operations. In addition the residual stresses...

... a deflection of 300 microns mean. A computer model was also used to estimate the level of compressive residual stress induced in the samples and micro hardness measurements were made to determine the depth of penetration of the peeing below the surface of the sample. Using a test procedure developed...

...EXPERIMENTAL PROCEDURE Residual Stress Assessment Abstract There has been an increase in the use of high strength materials for production casings in deep water applications. It has been observed that some of these deep water wells contain small amounts of H₂S. Consequently, the high...

.... ^{8 , 9} The laboratory research program, consisting of a metallurgical analysis, laboratory SCC testing and residual stress assessments, was launched to determine the most likely cause(s) of the cracking and identify contributing factors. Abstract In early 2012, a metallurgical investigation...

... of this work included the influence of coatings, metallic platings, and galvanic coupling to enhance resistance to ethanol SCC; conversely, the role of residual stresses in pipelines resulting from fabrication and field joining superimposed with stresses from maximum allowable working pressure was also...

... by temperature cycling from 20°C to -20°C. As a result, large-scale pitting corrosion occurs primarily in areas of high tensile residual stress and sensitive metallographic structures near weld beads in the freeze-thaw environment. Accelerated pitting corrosion is confirmed to have occurred as a result...

.... Introduction of stable, high magnitude compressive residual stresses into less expensive carbon steel alloys alleviates the tensile stresses and mitigates SSC while also improving fatigue strength. This could allow the potential of using less expensive alloys in sour environments. Low plasticity burnishing...

... exposure in NACE TM0284 test solution A. ¹ The highest material strength included was grade X70 designed for sour service to investigate whether HIC cracks can be initiated solely by the presence of high residual stresses. In addition to a substantial characterization of mechanical properties...

... influence of tensile stress and a corrosive environment on a susceptible material. Austenitic stainless steels including types 304L and 316L are susceptible alloys commonly used in nuclear weldments. An engineered residual stress field can be introduced into the surface of components that can reliably...

... Collars Prompts Analysis and Corrosion Specification ”, Paper 14763   presented at the IADC/SPE Drilling Conference , February 1986 , Dallas, Texas . 3 Kopecki , D.S. , “ Effects of Residual Stress on Stress-Corrosion Cracking of Nonmagnetic Drill Collars ”, Paper 161   presented at NACE...

... leads to a large increase in the boiling point of the solution. This leads to a reduction in the time to failure of a specimen by stress corrosion cracking. The as received tubes of 304 austenitic stainless steel, having either high or low levels of residual stress, were exposed to boiling magnesium...

...) and mainline pipe coatings, and (ii) 3LPP coating disbondment from fusion bonded epoxy (FBE) -steel interface. The PP cracking is attributed to thermo-oxidative degradation and high residual stresses in PP. The coating disbondment has been found to be due to high residual stress concentration and adhesion loss...

... inch diameter 0.083 inch wall thickness 316 stainless steel heat exchanger tubing was obtained for comparison. It was identified as sample number 316ST. * E-mail: [email protected] Abstract Requirements for residual stress control to prevent anodic stress-corrosion cracking...

...Abstract A method has been developed to produce a low cost specimen with controlled residual stress. Specimens were stress-relieved at a temperature of 1080°C and electropolished to remove pre-existing residual stresses. Then a four-point bending jig was used to bend the specimens to generate...

... periods and boiler start-up. Other important factors would include high residual stresses in the steel at attachment weld locations and bends, and pH of the hydro water used when the boiler is fired. Examples and case histories are presented to illustrate SAC in recovery boilers. stress-assisted corrosion...

... of nitrite, in a certain range the level of residual stresses, potential and atmosphere have already been discussed ^{1 , 2} . Chemical composition of investigated DHP-copper, UNS number C12200, is given in Table 1 . There is a certain residual phosphorus content. Copper purity is 99.97...

..., chemistry of grain boundaries and mechanism of damage. Important aspects of the design considerations, carbide precipitation and sliding of the grains have been discussed. Some remedial measures have been suggested. Stress rupture creep grain boundaries residual stress intergranular cracking carbide...