Abstract
The movement of an average concentration of Zn inside and outside the matrix in a room-temperature-aged Al-Zn alloy under irradiation environment has been studied, using small-angle neutron scattering. The samples of Al-11.8 at the percentage of Zn-alloy were irradiated with 2 MeV electrons with a flux of 10
14
electrons/cm
2
-s for different periods of time. It is observed that at low doses, the average Zn concentration in the precipitates decreases and consequently it moves into the matrix. On further doses of irradiation, some of the Zn atoms from the matrix return to the remaining precipitate, resulting in an increase of Zn concentration in the precipitates, but never attaining the original value.