... SSR specimens were characterized with SEM for ductile and brittle features. Fracture Toughness Test The slow rising displacement fracture toughness test was performed on a compact tension (CT) specimen. The specimen was machined from a round bar in the C-R orientation and has a fatigue pre-crack...

...Table 3 Summary of Fracture Toughness testing results Material Specimen ID Temperature, °F (°C) Nitrogen, psig (MPa) Hydrogen, psig (MPa) K-rate J_0.2mm, N/mm (lb/in) J_maxload, N/mm (lb/in) A_J, N/mm (lb/in) β K_jc, Nmm^-3/2 (ksi...

...Abstract Slow strain rate test and rising displacement fracture toughness test were performed to evaluate hydrogen embrittlement of three heats of precipitation hardened UNS N07718 nickel alloys in 3.5wt% NaCl, under cathodic polarization at low temperature 4.4°C (40°F). The susceptibility...

... of the material properties used for design verification analysis is Fracture Toughness (FT); in some applications, it is required that the service environment degradation effect be considered in obtaining material properties. In this work, FT of a specifically prepared Cu-Be alloy was measured in air...

... not help in understanding the crack propagation behavior under these conditions. There is also some limited fracture toughness evaluations performed on N07718 and N07716 materials ¹² that show the materials’ susceptibility to hydrogen embrittlement. Fracture toughness values were lower...

... utilized slow strain rate (SSR) tensile testing to aggressively identify any SCC behavior as a function of increasing methanol vapor content; whereas Phase 2 focused on fracture toughness testing with slow-strain rate rising K loading to determine the effect of methanol vapor on component fracture...

... cracking (HISC). Indeed, documented cases of failure due to HISC have somehow deteriorated the image of the SDSS and raised some concerns. The aim of this investigation is to evaluate through fracture toughness tests the susceptibility of SDSS to HISC and more specifically to determine the effect...

... with the aggressive environment Sulfide Stress cracking Fracture Mechanics DCB Fracture Toughness H₂S INTRODUCTION The sulfide stress corrosion cracking (SSC) of high strength low alloy carbon steels (HSLA), used in well completion, has been a problem of major concern for the reliable exploitation...

... and lengthy. Therefore, screening tests may be considered to evaluate the materials susceptibility to the environment in a shorter time and then design the matrix of experiments. Screening tests such as slow strain rate testing can be used, or some custom testing can be developed. FRACTURE TOUGHNESS TEST...

... of this work is to evaluate fracture toughness of two nickel containing steels as an alternative material to manufacture low temperature toughness improved CO₂ transporting pipelines. Microstructure, effective grain size (EGS), density of high angle grain boundaries (HAGB) and fracture toughness...

...H₂S CO₂ API 5LX-52 1% Ni steel welds wet gas fracture toughness plasticity tensile tests notched slow strain rate tests compact tension specimens INTRODUCTION Abstract This study presents slow strain rate, notched slow strain rate and compact tension test data...

... tungsten arc, hot wire (GTA-HW) process. The GTA-HW process was also used for the Stage I and Stage II buttering welds. Detailed welding conditions have been published previously ⁹ . Abstract The fracture toughness of nickel based alloys can be degraded when exposed to low temperature...

... temperatures. The complexity arises because of the lack of data characterizing the affect of hydrogen on fracture toughness. The mechanical testing required to determine fracture toughness of low-alloy steels exposed to high hydrogen pressures at elevated temperatures is not very common, and is not easy...

... for SCC and conventional SSR ratios as an indication of SCC. In these test conditions, butanol was less prone to promote SCC of steel than fuel-grade ethanol. Fuel grade ethanol stress corrosion cracking ethanol SCC carbon steel slow strain rate fracture toughness crack growth rate INTRODUCTION...

.... This is typically when a fatigue crack reaches a size sufficient to precipitate unstable crack growth. A measure of ‘fracture toughness’ determined in the appropriate environment and / or for hydrogen charged material needs to be considered. DESIGN DATA For long established technologies, such as transmission gas...

... of hydrogen on mechanical properties during a shut–down operation and on creep properties has been considered. Mechanical property testing of steels exposed to the above stated environments was conducted in order to determine the effect of hydrogen. Tensile, Charpy V-Notch CVN, and fracture toughness values...

... to trigger brittle fracture and a collapse of the orifice plate. Impact loads could originate from process material build-up falling from walls of the reactor chamber or by a power loss where the fluidized bed suddenly rests on top of the plate. Cr-Mo Steel temper embrittlement fracture toughness creep...

... on the fracture toughness parameters (Crack tip opening displacement CTOD, J-integral) of a duplex stainless steel (UNS-S31803). Cathodically precharged specimens have been tested as per the ASTM standard E 1820. It was seen that this standard fails to identify the initiation J-integral for these tough materials...

... to localized corrosion, hydrogen embrittlement and stress corrosion cracking while possessing very high strength, ductility, fracture toughness, high-cycle fatigue resistance and very low crack growth rate both in air and sea-water. This paper presents the results of the various fastener tests, crevice...

.... 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...