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Effect of Irradiation on Elastic-Plastic Toughness of Pressure Vessel Steels Pages: 22 Published: Jan 1983
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View License Agreement Source: STP819-EB Abstract Irradiation experiments were conducted in order to determine the effect of radiation damage on the elastic-plastic ductile fracture toughness of pressure vessel steels. Curves for the J-integral versus crack growth resistance (Δa) were established on specimens taken out of two nuclear reactor pressure vessel steels before and after neutron irradiation at 290°C to a fluence of 3.1019 n/cm2 (work function energy E > 1 MeV). The J-Δa tests were performed at room temperature (25°C) and service temperature (290°C). The main results obtained are as follows: • For J-Δa testing the tearing modulus appears to be the most sensitive parameter. • The two steels have significant differences in toughness, depending on their sulfur content. • The testing temperature strongly affects the J-Δa resistance curve. • Irradiation affects J-Δa curves only slightly for one steel but more significantly for the other at 290°C. • Changes in the J-Δa curves with irradiation and temperature seem difficult to predict from Charpy V results. Keywords: pressure vessel steels, irradiation embrittlement, elastic-plastic fracture mechanics Paper ID: STP31848S Committee/Subcommittee: E10.07 DOI: 10.1520/STP31848S ASTM International is a member of CrossRef. | ||