Grain Refinement Kinetics in a Low Alloyed Cu–Cr–Zr Alloy Subjected to Large Strain Deformation

Morozova, Anna; Borodin, Elijah; Bratov, Vladimir; Zherebtsov, Sergey; Belyakov, Andrey; Kaibyshev, Rustam

doi:10.3390/ma10121394

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Grain Refinement Kinetics in a Low Alloyed Cu–Cr–Zr Alloy Subjected to Large Strain Deformation

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Laboratory of Mechanical Properties of Nanostructured Materials and Superalloys, Belgorod State University, Belgorod 308015, Russia

Institute of Problems of Mechanical Engineering RAS, Saint-Petersburg 199178, Russia

Department of Elasticity, Saint-Petersburg State University, Saint-Petersburg 199034, Russia

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Laboratory of Bulk Nanostructured Materials, Belgorod State University, Belgorod 308015, Russia

Author to whom correspondence should be addressed.

Materials 2017, 10(12), 1394; https://doi.org/10.3390/ma10121394

Received: 14 November 2017 / Revised: 29 November 2017 / Accepted: 4 December 2017 / Published: 6 December 2017

(This article belongs to the Special Issue Dynamic Recrystallization and Microstructural Evolution in Alloys)

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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. View Full-Text

Keywords: Cu–Cr–Zr alloy; grain refinement; severe plastic deformation; triple junctions; grain refinement kinetics

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MDPI and ACS Style

Morozova, A.; Borodin, E.; Bratov, V.; Zherebtsov, S.; Belyakov, A.; Kaibyshev, R. Grain Refinement Kinetics in a Low Alloyed Cu–Cr–Zr Alloy Subjected to Large Strain Deformation. Materials 2017, 10, 1394. https://doi.org/10.3390/ma10121394

AMA Style

Morozova A, Borodin E, Bratov V, Zherebtsov S, Belyakov A, Kaibyshev R. Grain Refinement Kinetics in a Low Alloyed Cu–Cr–Zr Alloy Subjected to Large Strain Deformation. Materials. 2017; 10(12):1394. https://doi.org/10.3390/ma10121394

Chicago/Turabian Style

Morozova, Anna, Elijah Borodin, Vladimir Bratov, Sergey Zherebtsov, Andrey Belyakov, and Rustam Kaibyshev. 2017. "Grain Refinement Kinetics in a Low Alloyed Cu–Cr–Zr Alloy Subjected to Large Strain Deformation" Materials 10, no. 12: 1394. https://doi.org/10.3390/ma10121394

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Grain Refinement Kinetics in a Low Alloyed Cu–Cr–Zr Alloy Subjected to Large Strain Deformation

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