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Low frequency internal friction data were obtained on the alloy aluminium–5% magnesium to determine the effects of quenching and neutron irradiation on solute movement. A damping peak near 150 °C, attributed to stress-induced reorientation of solute atoms, was found to be shifted to lower temperatures by these treatments. This behavior corresponds to a reduction in relaxation time for the damping process, and is compatible with the idea that the solute atoms act as traps for vacancies.
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W. G. Nilson (1961) studied this question.
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