... metallurgically and all 25 had significant amounts of intermetallic precipitations. Impact toughness testing (Charpy V-notch) of SSDS items with intermetallic precipitations at different temperatures ranging from -50°C to +20°C revealed very poor toughness without any indications of a transition temperature...

...In spite of the austenitization conditions, non-standard cooling strategies can be considered during seam heat treatment to further improve toughness [ 9 ]. However, processing parameters have to be carefully selected in order to achieve the required mechanical properties. In this work, numerical...

... processes such as welding, hot working and heat treatments. Furthermore, in most applications of the two most widely used DSS, UNS N° S32750 and UNS N° S32205, precipitation of intermetallic phases could induce a decrease in toughness and/or corrosion resistance (e.g. marine applications, oil and gas...

... . The brittle nature of the cracking, the retention of a good level of toughness and ductility in the bulk of the forging, the delayed nature of the cracking, the absence of corrosion attack and the presence of hydrogen gas due to cathodic protection caused the investigators to conclude that the failure mode...

... of; Strength, weldability, fracture toughness and structural integrity. Corrosion resistance in natural and chlorinated seawater. Corrosion resistance in CO₂/ H₂S/Cl^- process environments. Corrosion resistance in in marine atmospheres. They have high design strength...

... stability based on linear elastic fracture mechanics. The criteria can be used to infer the material toughness and the toughness gradient at a propagating crack tip. These have implications on the mechanisms and kinetics of crack propagation. Of particular interest is the role that crack geometry may play...

.... The coating can be produced up to 100 microns thick, which is unique for hard CVD coatings. As a nano-structured material, it demonstrates outstanding toughness, crack and impact resistance. The gas-phase CVD process enables the coating of internal surfaces and complex designs such as valves, hydraulic...

...Tensile tests were performed and Charpy V-notch transition curves were determined together with the Fracture Appearance Transition Temperature (50% FATT). NACE TM 0177-96 Method D was used to assess environmental fracture toughness of C125 steels. Fatigue pre-cracked specimens were tested...

... was conducted using single direction rolling and the ratio between the laboratory melt ingots and the 12mm thick plates was around 10. Abstract A new 95 ksi grade CRA, was developed that is cheaper than super13%Cr, and has excellent toughness compared to conventional 13%Cr. Water quenching feasibility, high...

...). The critical exposure temperature (CET) for these tanks was –4°C (25°F). The Charpy V-notch impact testing provides information as to whether the steel will exhibit adequate toughness. The absorbed energy not only decreases as the temperature decreases but also carbon steel experiences a transition from...

...), and good Charpy toughness was obtained in extremely low temperature condition. This material showed remarkably high strength even at high temperature of 200 degree C. The CO₂ corrosion resistance was significantly improved so that the critical temperature for the developed pipe was more than 200...

.... Charpy impact test Full size Charpy impact test was carried out at –56 and –70 degree C. Full size specimens were cut at the center of wall thickness from strain aging specimens. Fracture toughness CTOD (Crack Tip Opening Displacement) test (12mm x 24mm) was conducted at –30 degree C in accordance...

... as solution heat treated condition and have relatively poor phase stability. In this paper, an exploratory study has been done to find a new nickel base alloy, which has improved phase stability and low susceptibility to aging degradation. Hardness, impact toughness, and corrosion resistance in acidic...

... stainless steel welding consumables have been applied for girth welding of these materials. In these cases, their undermatching weld joint has been pointed out. The ordinary matching type gas metal arc welding (GMAW) consumables have the inevitable problem of poor toughness. That is owing to the elevation...

... to maintain the proper concentration of H₂S. Bauschinger effect cold work collapse downhole mechanical properties MR0175 oil and gas production steel strain aging sulfide stress cracking SSC toughness tubular expansion well completion INTRODUCTION Downhole tubular expansion...

... for the development of deep wells. Especially, combination of high strength and low temperature toughness was required at the handling especially in the north area. Low temperature toughness for 13Cr steel pipe decreases with the increase in strength. Duplex stainless steel pipes or modified 13Cr steel pipes ³...

... stainless steels as a partial substitute for 22%Cr duplex stainless steels ^{15 - 18} . Lower C and higher Ni and Mo from Type AISI 420(13%Cr-0.2%C) are the basic modified points. Lower C content led to high toughness. Therefore, it is possible to achieve high strength steels. In addition, excellent...

... environment. Supermartensitic steels flow-line slightly sour Gas Tungsten Arc Welding (GTAW) toughness Sulfide Stress Corrosion (SSC) Uniform corrosion INTRODUCTION In the recent years oil & gas wells have been developed in increasingly severe corrosive environments characterized by high...

... requires the longitudinal axis of charpy impact test samples be taken ½”(Bmm) from the surface for base metals over 1” (25.4mm) thickness which is near mid-wall in this case. Proper Q&T heat treatment is critical to mid-wall impact toughness properties for material of this thickness. Base metal impact...

...6% Mo crevice corrosion embrittlement ferric chloride microstructure sigma phase superaustenitic stainless steels toughness UNS N08367 INTRODUCTION Abstract A 6% Mo superaustenitic stainless alloy (UNS N08367) was exposed at temperatures in the 1000 to 1900°F (538 to 1038°C) range...