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The Development Of Eta Function For Notch Tensile Testing Of Sulfide Stress Cracking (SSC) Susceptibility

The Development of Eta Function for the Calculation of J-Integral Based on Notch Tensile Testing in Sulfide Stress Cracking (SSC) Susceptibility Evaluation
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Carbon steels and low alloy steels have been used extensively in the oil and gas industry for many decades. The success of their applications in the energy sector is a balanced result of the materials affordability and operation needs in the fields. Producing H2S containing fluids remains a challenge for well integrity as no compromise is acceptable. 

Product Number: 51322-18000-SG
Author: Yuan Ding, Lianlian Liu, Sebastian Cravero, Bostjan Bezensek, Raymundo Case
Publication Date: 2022
Industries: Oil and Gas , Coatings
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$20.00
$20.00

A new methodology to evaluate the SSC susceptibility of high strength low alloy carbon steels (HSLA) based on a round notched tensile slow strain rate (NTSSRT) method was introduced and discussed by the authors in CORROSION 20211. This novel method provides an economic and more efficient way of evaluating SSC susceptibility of high strength carbon steels compared to the traditional DCB test2 or other fracture mechanics test methods. 

The approach unitizes round notch tensile specimen under slow strain rate tested in situ in sour environment. The post-processing of the tensile test results is done with the use of fracture mechanics based approach where the notch is postulated to behave as a sharp crack. The critical stress intensity factor is calculated using an FEA calibrated correlation function (the eta function) and designated as the KISSC for the materials. 

A new methodology to evaluate the SSC susceptibility of high strength low alloy carbon steels (HSLA) based on a round notched tensile slow strain rate (NTSSRT) method was introduced and discussed by the authors in CORROSION 20211. This novel method provides an economic and more efficient way of evaluating SSC susceptibility of high strength carbon steels compared to the traditional DCB test2 or other fracture mechanics test methods. 

The approach unitizes round notch tensile specimen under slow strain rate tested in situ in sour environment. The post-processing of the tensile test results is done with the use of fracture mechanics based approach where the notch is postulated to behave as a sharp crack. The critical stress intensity factor is calculated using an FEA calibrated correlation function (the eta function) and designated as the KISSC for the materials. 

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