An influence of prior tensile plastic deformation on the basic creep parameters such as minimum creep rate, time to rupture, duration of creep stages and ductility is studied for copper and aluminium alloy. The materials were tested at two different temperatures; copper at 523 K and 573 K; aluminium alloy at 423 K and 473 K. It is shown for both materials, that depending on the deformation history the basic creep parameters may attain values which are more beneficial from engineering point of view than those for the nonprestrained material determined. It is also shown that in some cases prior plastic deformation may lead to the detrimental effects expressed by the lifetime reduction. The experimental data achieved are discussed in detail and used to verify the basic assumptions of the recovery creep theory.
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