RESEARCH ON INTERSTITIAL ALLOYING ELEMENTS IN THE MECHANICAL BEHAVIOR OF METALS
CASE INST OF TECH CLEVELAND OHIO
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Hydrogenerated K-monel showed nonuniform distribution of H to a depth of 0.005 in. The embrittlement of the charged alloys decreased as the strain rate increased above 1 in.min. At 19,000 in.min, the ductility returned to that of the uncharged material ductility recovery occurred at strain rates below 1 in.min. Placing a drop of H2O at the tip of the crack of 4340 sheet specimens notched and precracked greatly decreased the failure time. Failure tests conducted in controlled atmospheres, dry air, and Ar produced inconclusive results. Resistance measurements showed that the failure took place by discontinuous crack propagation. Interstitial induced delayed brittle-failure tests have indicated full recovery from strainage embrittlement.