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Showing 1 to 7 of 7 for “"Hydrogen cracking"”.
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Prevention of hydrogen cracking in HY-80 welds
Thesis: M.S., Massachusetts Institute of Technology, Department of Ocean Engineering, 1983
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Hydrogen distribution and redistribution in the weld zone of constructional steels
… major cause of brittle failure was identi ed as hydrogen embrittlement of the weld zone, although a comprehensive understanding of this phenomenon is not, even now, available. Hydrogen in solution in the weld zone is found in arc welds, due to the intense conditions in the welding arc. There is …
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Susceptibility of creep aged material to stress relief cracking during repair welding
… reasons for weld failure after welding due to hydrogen and reheat cracking. Hydrogen cracking is investigated with the use of slow strain rate tensile tests during cathodical charging the specimen with hydrogen. The phenomenon of reheat cracking is investigated with the use of high temperature …
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Development and modelling of weld cooling time equations.
… susceptibility of a weld's heat affected zone to hydrogen cracking is largely governed by the severity of the cooling portion of the weld's thermal cycle. The 800 to 500 °C cooling time is particularly critical. A model to link the weld bead geometry to the 8OO to 500 °C cooling time for submerged …
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Thermomechanical factors influencing weld metal hydrogen assisted cold cracking
Hydrogen Assisted Cold Cracking is a phenomena that manifests itself in weldments when a critical hydrogen concentration is trapped within a susceptible microstructure and subjected to a threshold level of stress and poses a significant threat to pipeline girth weld integrity, in particular the …
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Weldability and hydrogen relationships in super duplex stainless steel.
… 50% ferrite, the response of these two phases to hydrogen is of interest to the users of these materials. A study has been made of the hydrogen cracking behaviour in welded super duplex stainless steel using the GTA welding process. The aim of this work was to determine the effects of diffusible …
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Hydrogen embrittlement testing of alloy 718 for oil and gas applications
Hydrogen embrittlement of Ni-base corrosion resistant alloys (CRAs) can occur in deep sea oil wells when components are exposed to hydrogen while under stress. The effects of microstructure on hydrogen embrittlement of precipitation hardened Ni-base CRAs, such as alloy 718, are not fully …