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Radiation Embrittlement of Ferritic Steels Global Objective Temperature Cv or J1c RVSP - Reactor Vessel Surveillance Programs Recent advances Effect of.

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Presentation on theme: "Radiation Embrittlement of Ferritic Steels Global Objective Temperature Cv or J1c RVSP - Reactor Vessel Surveillance Programs Recent advances Effect of."— Presentation transcript:

1 Radiation Embrittlement of Ferritic Steels Global Objective Temperature Cv or J1c RVSP - Reactor Vessel Surveillance Programs Recent advances Effect of DSA on Fracture Toughness Effect of Cyclic-Loading on Fracture Toughness

2 Some of the Ferritic Steels & Iron studied at NCSU a wires - irradiated in HIFAR Australia b grain sizes - 50 - 300  m Irradiated in Pulstar at NCSU Cd-Wrapped vs No Cd-Wrapping

3 K. Linga (KL) Murty K. Linga (KL) Murty Dislocation – Interstitial Impurity – Point Defect Interactions Pure Fe / Mild Steel New Finding : Radiation is not always detrimental Nature – 1984 Is Neutron Radiation Always Detrimental to Metals (Steels) ? Nov. 00

4 Editorials on our research finding (two examples) Discussion broadcast on BBC (Dr. E. Little) New Scientist Science News Lead to technological application Nov. 00

5 DSA & Radiation Effects A533B RPV steel Effects of Temperature and Radiation on J 1c Recent advances Effect of DSA on Fracture Toughness Effect of Cyclic-Loading on Fracture Toughness (again – significance and influence of defects) Nov. 00

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