Abstract
Delayed failure tests, in which suitable samples were cathodically charged with hydrogen (current density 8 mA·cm −2) in 0.1 N sulphuric acid, while under sustained tensile loads, were conducted upon a low alloyed Ni-Cr steel (UNI 38 NiCrMo 4) with different conditions of heat treatment. The satisfactory reproducibility of the experimental results have indicated the suitability both of the method used and the test specimen shaped to prevent stress concentration and mechanical and/or electrochemical cracking.
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