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- W2233333809 abstract "The present status of work on the problem of brittle fracture of steel at low stresses is discussed. Recent investigations have shows that when a crack is initiated in a sample of steel held under a constant tensile stress, but with a temperature gradient so chosen that the crack is initiated at a low temperature, the crack is arrested at some higher temperature, called the crack arrest temperature. The test results show that there is a transition temperature, of the order of OC, above which the crack, once initiated, will continue to travel even though the applied stress is only of the order of 4 tons/ sq. in. In other experiments, welding test plates 1 in. in thickness and 3 ft. in width were made with artificial defects in the weld. The plates were cooled to a pre-selected temperature and then stressed uniformly in the direction of the weld. It was found that a relationship existed between the temperature and the stress necessary to initiate failure. The Research Laboratories of Colvilles, Ltd., undertaok an investigation to determine the influence of residual stresses. As a result of this series of tests it was shown that the presence of the residual stressesmore » consequent on the welding operation were necessary if fracture at stresses lower than the yield point were to be initiated. (J.H.M.)« less" @default.
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- W2233333809 date "1958-11-01" @default.
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- W2233333809 title "PRESSURE VESSELS AND THE PROBLEM OF BRITTLE FRACTURE" @default.
- W2233333809 hasPublicationYear "1958" @default.
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