Abstract
The high intensity irradiation environments produced by advanced fast fission and proposed fusion reactors, high voltage electron microscopes, and heavy ion accelerators add a new and exciting dimension to materials science. Typical irradiations of alloys in these devices introduce the order of 108 J/mol displacement energy in the form of vacancy-interstitial (Frenkel) pairs. Although most of this energy is disspiated as heat during Frenkel pair recombination, significant amounts may be harnessed to produce microstructural change, hence changes in the phase diagram. This extended abstract discusses the various atomistic mechanisms available to convert irradiation energy to microstructural change and cites selected experimental observations where the various mechanisms are operative. An extensive, critical review of phase stability under irradiation is in press [1].
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