作者: J.K. Chakravartty , G.E. Prasad , T.K. Sinha , M.K. Asundi
DOI: 10.1016/0022-3115(86)90261-8
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摘要: Abstract The influence of hydrogen on the mechanical properties ASTM A 203 D nuclear structural steel has been studied by tension, bend and delayed-failure tests at room temperature. While tension charged unnotched specimens reveal no change in ultimate strength ductility, effect is manifested notched (tensile bend) as a decrease (maximum load test) ductility; increases with increasing content. It observed that for given concentration, ductility remarkably large compared to tensile ductility. Hydrogen charging does not cause any upto 200 h under an applied stress, 0.85 times notch strength. However delayed failure occurs samples less than 10 bending about 0.80 uncharged maximum load. Fractographs show ductile dimple fracture, while those hydrogen-charged conditions mixture quasi-cleavage cracking. proportion cracking content this fracture mode more predominant specimens. changes modes can reasonably be explained existing theories embrittlement. An attempt made explain significant difference embrittlement susceptibility light triaxiality plastic zone size near tip.