Abstract
The hot isothermal deformation of dispersion hardened Cu–Cr–Nb alloy was studied by varying strain rate and temperature during compression testing. The compressive stress-strain curves showed oscillations in the flow stress typical of type A, type B and type C serrations which are typical of Portevin-Le Chatelier effect. The serrated flow was attributed to the pinning of mobile dislocations by Cr2Nb precipitates. The presence Cr2Nb precipitates was also found to affect the dynamic recrystallization process during hot isothermal hot deformation.
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