Effect of prior austenite grain morphology on hydrogen embrittlement behaviour under plastic straining in as-quenched 500 HBW steels

Influence of Prior Austenite Grain Structure on Hydrogen-Induced Fracture in As-Quenched Martensitic Steels

“…With less fluctuating force values, a specific force value could be chosen for steel comparison instead of displacement. On the other hand, research can also be conducted with small plastic region [48].…”

Data‐analysis method for hydrogen embrittlement tuning‐fork test

“…[ 11 ] For elongated PAGs with transgranular quasi‐cleavage crack propagation, force decrease was gradual. [ 10 ] Such mechanisms can affect the first‐ and second‐order time derivatives of the force curve. The full quantitative theory describing the methods is, however, out of the scope of the current article, which focuses on the data‐analysis method for obtaining the first and second‐order derivatives.…”

“…[4] A novel tuning-fork testing (TFT) method has been recently developed for studying HE of ultrahighstrength steels. [7][8][9][10] TFT is a fracture test that combines constant displacement with a loadcell clamping system which allows to monitor different stages of crack propagation under cathodic hydrogen charging. From each test, a time-force (t-F) data are produced and analyzed to determine the indicator values initiationtime and time-to-fracture which are used to evaluate HE susceptibility.…”