... casing head was developed. Its sealing structure adopts the form of X Metal sealing at the upper end and rubber seal at the lower end, which has the characteristics of high pressure bearing and reliable sealing performance. The structural design verification of the 140 MPa mandrel casing head...

... at confining pressures less than 1 MPa. The experimental study systematically investigates the fracture creep under different confining pressures and flowrates by conducting fracture flow tests in a triaxial system. In addition, the mechanisms underlying the permeability evolution were also examined to some...

... glass tubes in the presence of hydrogen-isotopically contrasting waters. Parallel heating experiments applied hydrostatic pressures from 0.1 to 300 MPa. Control experiments constrained the influence of pre-existing and residual methane in closed pores of rock chips that was unrelated to newly generated...

... deterioration normally occurs as result of the rapid heating and cooling cycles in welding. The present investigation addresses tensile behavior and toughness properties of 32 and 50 mm thick 420 MPa plates, including tensile testing at both room temperature and −60°C, and Charpy V impact toughness and CTOD...

... ABSTRACT This paper focuses on the investigation, assessment and comparison of a 420 MPa structural steel Charpy (CVN and pre-cracked) and fatigue crack growth rate test at different temperature spanning from room temperature to −120°C. Since weldments constitute the most probable location...

... with the squeezing ground and takes hours of curing to reach full strength. Noticing a void in this ground support technique, Jennmar Corporation, Inc. and its subsidiary Keystone Mining Services, LLC (KMS) developed and fine-tuned the Multiple Point Anchor (MPA) hollow core yielding bolt with the injectable J-LokP...

... ABSTRACT This paper reports the performance of HVOF-sprayed corrosion resistant alloy (CRA) coatings in an aqueous solution pressurized with 50 MPa supercritical CO 2 . UNS N10276, UNS N06625 and UNS S31603 were procured in power form and sprayed onto carbon steel with a HVOF system...

...Verification of an Electrochemical Model for Aqueous Corrosion of Mild Steel for H2S Partial Pressures up to 0.1 MPa Saba Navabzadeh Esmaeely, Bruce Brown, Srdjan Nesic Institute for Corrosion and Multiphase Technology, Department of Chemical and Biomolecular Engineering, Ohio University, 342 W...

... on this phenomenon, fatigue crack growth tests have been performed on a 420 MPa structural steel weld simulated coarse grained heat affected zone (CGHAZ) at different temperatures: room temperature, -30, -60, -90 and -120 °C, with -60 °C considered as a possible design temperature relevant for the most extreme...

... This paper is focused on the definition of two new grades of high strength steel for offshore mooring chains providing increased strength and reduced weight for a given size. The new grades are identified as: R5S, with an ultimate tensile strength of 1100 MPa. R6, with an ultimate...

... MPa structural steel, one of the probable candidate materials to be used for structural purpose here. Since weldments are the most susceptible to fatigue failures, the fatigue crack growth measurements have been performed not only on parent metal, but they have been extended also to weld thermal...

... on the tensile testing of base materials and weld thermal simulated microstructures (CGHAZ and ICCGHAZ) from a 420 MPa steel at 0, −30, −60 and -90°C. The dependency of yield stress, tensile strength, Lüders strain as well as strain hardening on temperature will be discussed. For situations where tensile test...

... toughness is appropriate in the weld area. Naturally these results are valid only for the tested steel grades and cannot be used with other UHSS products. uhss steel hydraulic fracturing fracture toughness strength MPa )UDFWXUH 7RXJKQHVV RI :HOGHG -RLQWV PDGH RI 8+66 6WHHO ZLWK D...

... toughness, it is very important to control the fraction and shape of the M-A constituent. In this study, a test plate (specified minimum yield strength, SMYS: 500 MPa) was fabricated by direct quenching and tempering process. Differently simulated weld thermal cycles for CGHAZ and IRCGHAZ were carried out...

... and coastal protected areas (MPA) because the waters of the seas are under the jurisdiction of the Federation and any protected areas can be established only at the federal level there. Only nature reserves and national parks are composed of scientific departments, which are responsible to conduct scientific...

... conditions. Particular attention must be payed on the development of proper weld procedures for fabricating structural components from these alloys. This paper will address the material design, examine the weldability of fine-grained, high-strength hollow sections which possess yield strengths of 690 MPa...

... joint of 20 mm thick 420 MPa steel plates. Both Charpy V notch impact and CTOD fracture mechanical testing were included with test temperature of ?30°C. The results indicate that the heat affected zone (HAZ) of the examined steel appeared with satisfactory toughness (> 200 J, > 0.2 mm) while...

... result calculation principal stress material parameter fem analysis tension test isope failure criteria weld toe Ultimate Capacity of Non Load Carrying Weld of a Structural Steel with Yield Strength 960 MPa Ilkka Valkonen Rautaruukki Oyj Hämeenlinna, Finland ABSTRACT In this paper, the failure...