2/26/2023 0 Comments Tuning fork for fracture![]() ![]() Polder, Corrosion of Steel in Concrete Corrosion, John Wiley & Sons, Hoboken, NJ 2004. Heidersbach, Metallurgy and Corrosion Control in Oil and Gas Production, John Wiley & Sons, Hoboken, NJ 2011. Covino), ASM International, Materials Park, OH 2006. 10 ASM Handbook Volume 13C: Corrosion: Environments and Industries (Eds: S.Shipley), ASM International, Materials Park, OH 2002. ![]() 8 ASM Handbook Volume 11: Failure Analysis and Prevention (Eds: W.Lorenz, Standard Handbook of Petroleum and Natural Gas Engineering, Gulf Professional Publishing, Houston, TX 2016. Jones, Stress-Corrosion Cracking, ASM International, Materials Park, OH 1992. Cottis, Stress Corrosion Cracking-Guides to Good Practice in Corrosion Control, National Physical Laboratory, Teddington, UK 2000. Pallaspuro, Ph.D Thesis, University of Oulu, Finland, 2018. Porter, Encyclopedia of Iron, Steel, and Their Alloys, CRC Press, Boca Raton, FL 2016. However, the potentiostatic technique produces larger differences between the lowest fracture stress results, thus having a better resolution. ![]() Both hydrogen charging techniques produce similar results, and it is observed that the fracture stress decreases with the increase in hardness. For each steel grade, the lowest fracture stress and highest no-fracture stress are determined. Different direct-quenched, low- and medium-carbon steel grades, with a hardness range of 300–550 HBW, are investigated with both galvanostatic and potentiostatic hydrogen charging techniques. In this study, the testing method is further developed, making the potentiostatic hydrogen charging possible through the modifications of the corrosion cell. Special tuning-fork specimens are designed to enable accurate stress adjustment via constant displacement under cathodic hydrogen charging conditions. A novel tuning-fork test method was developed to study hydrogen-induced stress corrosion cracking of high-strength steels. ![]()
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