1. Grain Refinement Kinetics in a Low Alloyed Cu-Cr-Zr Alloy Subjected to Large Strain Deformation.
- Author
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Morozova, Anna, Borodin, Elijah, Bratov, Vladimir, Zherebtsov, Sergey, Belyakov, Andrey, and Kaibyshev, Rustam
- Subjects
CHROMIUM copper alloys ,GRAIN refinement ,DEFORMATIONS (Mechanics) ,METAL recrystallization kinetics ,MATERIAL plasticity - Abstract
This paper investigates the microstructural evolution and grain refinement kinetics of a solution-treated Cu-0.1Cr-0.06Zr alloy during equal channel angular pressing (ECAP) at a temperature of 673 K via route B
C . The microstructural change during plastic deformation was accompanied by the formation of the microband and an increase in the misorientations of strain-induced subboundaries. We argue that continuous dynamic recrystallization refined the initially coarse grains and discuss the dynamic recrystallization kinetics in terms of grain/subgrain boundary triple junction evolution. A modified Johnson-Mehl-Avrami-Kolmogorov relationship with a strain exponent of about 1.49 is used to express the strain dependence of the triple junctions of high-angle boundaries. Severe plastic deformation by ECAP led to substantial strengthening of the Cu-0.1Cr-0.06Zr alloy. The yield strength increased from 60 MPa in the initial state to 445 MPa after a total strain level of 12. [ABSTRACT FROM AUTHOR]- Published
- 2017
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