ABSTRACT
In-situ TEM observation of dislocation behavior has been carried out in aluminum during 400 keV Al+ ion irradiations. Characteristic dislocation interaction with defects is observed, e.g. preferential clustering near dislocations, vacancy absorption and climbing to form helical dislocations. Since these interactions have not been reported in the previous HVEM electron irradiations, they are considered to represent the effect of cascade defect formation. The temperature dependence of the dislocation behavior is found to correspond well with the case of nickel irradiated with Ar+ ions. In both cases, vacancy mobility is proved to be a key factor for dislocation behavior.
