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Diffusion mechanisms in fcc materials during irradiation with high energy particles due to vacancies, interstitials, di-interstitials, and dynamic crowdions are discussed in this publication. It is shown that in most alloys an increase in the degree of order is obtained by migrating vacancies and interstitials, and only in alpha-copper-zinc alloys mainly interstitials and in nickel-chromium alloys mainly vacancies are able to increase the degree of order during irradiation. The migration activation energies of intersititials and of vacancies for these two alloys are derived. Mass transport also by channelling and by dynamic crowdions is shown for Ni(63) in nickel irradiated with 1.85 Me electrons.

Additional information

Authors: SCHÜLE W, JRC Ispra (IT)
Bibliographic Reference: EUR 16109 EN (1994) 13pp., FS, free of charge
Availability: Available from the Public Relations and Publications Unit, JRC Ispra, I-21020 Ispra (IT)
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