Effects of internal Hydrogen (cas 1333-74-0) and surface-absorbed Hydrogen (cas 1333-74-0) on the Hydrogen (cas 1333-74-0) embrittlement of X80 pipeline steel
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Add time:09/04/2019 Source:sciencedirect.com
Effects of internal Hydrogen (cas 1333-74-0) and surface-absorbed hydrogen on hydrogen embrittlement (HE) of X80 pipeline steel were investigated by using different strain rate tensile test, annealing and hydrogen permeation tests. HE of X80 pipeline steel is affected by internal hydrogen and surface-absorbed hydrogen, and the latter plays a major role due to its higher effective hydrogen concentration. The HE susceptibility decreases with increasing the strain rate because it is more difficult for hydrogen to be captured by dislocations at the high strain rate. Annealing at 200 °C can weakened HE caused by internal hydrogen, while it has little effect on HE caused by surface-absorbed hydrogen. HE of X80 pipeline steel is mainly determined by the behavior of dislocation trapping hydrogen, which can be attributed to the interaction between hydrogen and dislocation.
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