A single isothermal constant strain rate compression test was carried out for 6061 aluminum alloy by the Gleeble-3500 simulator to understand the dynamic recrystallization behavior of the alloy under thermal deformation conditions at 0.001～1 s

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and 350～500 ℃.The peak stress data of the rheological stress curve obtained from the statistical test determines that the thermal deformation activation energy of the alloy is Q=307.528 kJ·mol

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and the rheological stress equation

dynamic recrystallization peak and critical strain model under different thermal deformation conditions are established.The dynamic volume fraction of the alloy was calculated under different deformation conditions according to the rheological stress curve

and the dynamic model of dynamic recrystallization was established.Analysis of rheological stress curve shows that with deformation of 6061 aluminum alloy at 350～500℃

the strain rate is decreased

so the structure of the 6061 alloy is more easily to undergo dynamic crystallization

and the stress softening phenomenon is more obvious.