Considerations on the validity of the various radiation damage models
The validity of the one interstitial (OIM), of the two interstitial (TIM), and of the modified two interstitial modes (MTIM) are discussed, with reference to the results of experiments on pure fcc metals and their alloys. It is shown that experimental results are in agreement with the prediction of MTIM. Interstitials are only mobile at or above ambient temperature in most metallic materials and they are commonly more mobile than vacancies. The mobilities of all point defects increase with increasing flux of the high energy particle. The mobility of the point defects increases in the presence of sinks e.g. interstitial clusters and dislocations. It is further shown that the chemical rate equations cannot be applied to describe the defect concentrations built up during high energy particle irradiation in most cases. Crowdions are found to be stable in some metallic materials and to be very mobile at very low temperatures, Some implications of the MTIM to the development of radiation resistant alloys are discussed.
Bibliographic Reference: EUR 12335 EN (1989) MF, 33 pp., ECU 4, blow-up copy ECU 5
Record Number: 198911113 / Last updated on: 1994-12-01
Original language: en
Available languages: en