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Effects of Neutron Irradiation on the Notch Ductility of 15MnTi Steel Pages: 6 Published: Jan 1994
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View License Agreement Source: STP1175-EB Abstract 15MnTi steel as a support plate must withstand both the weight of the reactor core of about 100 tons and dynamic loads at 40°C to 50°C. In this study, the steel was embrittled by the neutron irradiation from the reactor core. The ductile-brittle transition temperature was also increased. The specimens were taken from base plate, weld metal, and weld heat-affected zone. The specimens were irradiated in a swimming pool reactor (SPR). The test results included impact energy (αk), reference transition temperature (RTNDT), and transition temperature increase (ΔTcv) of 15MnTi steel under the neutron exposure 1 to 2 × 1018n/cm2(E > 1 MeV). The transition temperature was 6°C and 2°C for base plate and weld metal, respectively, after 1 × 1018n/cm2(E > 1 MeV) at 50°C. The transition temperature increase was 40°C, 41°C, and 32°C for base plate, weld metal, and weld heat-affected zone, respectively, after about 2 × 1018n/cm2(E > 1 MeV) at 50°C. The data of transition temperature increased on 15MnTi steel after 1 to 6 × 1018n/cm2(E > 1 MeV) at 50°C was summarized. An empirical equation was obtained: T = 32.7 - 1.8 lnϕt + 17.8 ln2ϕt, where ϕt is fast neutron exposure (E > 1 MeV). Keywords: irradiation effects, impact, steel, ductile-brittle transition temperature Paper ID: STP23962S Committee/Subcommittee: E10.08 DOI: 10.1520/STP23962S ASTM International is a member of CrossRef. | ||