Abstract
Hydrogen charged nickel was deformed in tension at a test temperature of 208 K to study the diffusive segregation of hydrogen during straining and the dependence of embrittlement on grain boundary hydrogen concentration and deformation rate. Tests were performed on samples in the as-quenched condition at various strain rates. An increase in the degree of embrittlement at slow strain rates can be attributed to diffusive segregation of hydrogen to grain boundaries during the test period. The embrittlement of samples with equal grain boundary hydrogen concentration was found to be relatively insensitive to strain rate, bulk hydrogen concentration and the total time at the test temperature.
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