... steels is lower than in OCTG steels under both electrochemical and sour H charging. Thermal Desorption Spectroscopy (TDS) studies showed that the major trap sites for hydrogen in all steels were weak or reversible traps. Dislocations and carbides were identified as the majority traps in line pipe steels...

... of high strength low alloy welds of conventional rutile-type flux-cored wires. This is because the heat of PWHT promotes the precipitation of fine carbides in the weld metal by combining carbon with small amounts of niobium and vanadium, which is known as precipitation hardening. It has been already...

... is heat treated by quenching, lamellarizing, and tempering. The resulting microstructure consists of predominantly martensite with significant volume fraction of reverted austenite plus carbides. The Charpy impact energy absorption of plates of the new steel are comparable with historic production values...

... they can both enhance the resistance against H induced failure and strengthen the material. Well-designed H trapping sites may be a relevant strategy to enhance the H embrittlement (HE) resistance. This work studies five types of carbides in three Fe-C-X alloys with increasing carbon content: Ti, Cr, Mo, V...

... annihilation and internal stress relaxation, development of carbide forming processes, and formation of high levels of strength and ductility (Gorynin et al., 1999b). For economic reasons, alloying levels in modern high-strength steels are reduced to as low as is reasonable. When reducing the alloying levels...

... of a structure with morphologically uniform structural constituents of primarily globular shape; formation of a structure that is fragmented in the rolling process during steel fabrication; and formation of a finely dispersed carbide phase of globular morphology. For an optimal combination of hardening...

... Abstract The present study aims at characterizing the carbide precipitation behavior of model high Mn steels by developing a time-temperature-precipitation (TTP) and continuous-cooling-precipitation (CCP) diagram. Samples were isothermally heat treated at 1150°C for 1 hr to dissolve pre...

.... A volume of 400 hexagonal and randomly oriented grains is imposed to cover a representative amount ahead of the crack tip, whereas the remaining continuum volume is described by a simple phenomenological elasto-plastic model. By assuming randomly distributed carbides in the grains, the probability...

... and dislocations is considered to play a main role in aging behavior. Because any other contents do not have enough mobility, any precipitation except iron carbides hardly occur. The recovery of dislocations is also difficult at the temperature. The possible mechanisms of thermal aging are carbide precipitation...

... integrity friction stir weld inconel alloy 600 base material corrosion management corrosion resistance steel stir zone h2s management carbide corrosion inhibition fsw metals & mining microstructure production chemistry riser corrosion oilfield chemistry Properties and Microstructure...