Abstract
Logarithmic stress relaxation was studied in 99.999% polycrystalline nickel at natural strains of up to 25% at 20, 77, 200 and 293°K. The activation energy of 1,4 ± 0.2 eV associated with the process suggests that vacancy formation by jogged dislocations is rate determining. At room temperature significant loss or immobilisation of dislocations during relaxation appears to be facilitated by crossslip.
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