Grain refinement kinetics in a low alloyed Cu-Cr-Zr alloy subjected to large strain deformation

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

doi:10.3390/ma10121394

Grain refinement kinetics in a low alloyed Cu-Cr-Zr alloy subjected to large strain deformation

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

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

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.

Original language	English
Number of pages	1
Journal	Materials
Volume	10
Issue number	12
DOIs	https://doi.org/10.3390/ma10121394
Publication status	Published - 6 Dec 2017

Keywords

Cu-Cr-Zr alloy
Grain refinement
Grain refinement kinetics
Severe plastic deformation
Triple junctions

Access to Document

10.3390/ma10121394

Cite this

@article{de0b459f8fd44c1fae171d1aea1f97e6,

title = "Grain refinement kinetics in a low alloyed Cu-Cr-Zr alloy subjected to large strain deformation",

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 BC. 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.",

keywords = "Cu-Cr-Zr alloy, Grain refinement, Grain refinement kinetics, Severe plastic deformation, Triple junctions",

author = "Anna Morozova and Elijah Borodin and Vladimir Bratov and Sergey Zherebtsov and Andrey Belyakov and Rustam Kaibyshev",

year = "2017",

month = dec,

day = "6",

doi = "10.3390/ma10121394",

language = "English",

volume = "10",

journal = "Materials",

issn = "1996-1944",

publisher = "MDPI",

number = "12",

}

TY - JOUR

T1 - Grain refinement kinetics in a low alloyed Cu-Cr-Zr alloy subjected to large strain deformation

AU - Morozova, Anna

AU - Borodin, Elijah

AU - Bratov, Vladimir

AU - Zherebtsov, Sergey

AU - Belyakov, Andrey

AU - Kaibyshev, Rustam

PY - 2017/12/6

Y1 - 2017/12/6

N2 - 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 BC. 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.

AB - 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 BC. 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.

KW - Cu-Cr-Zr alloy

KW - Grain refinement

KW - Grain refinement kinetics

KW - Severe plastic deformation

KW - Triple junctions

U2 - 10.3390/ma10121394

DO - 10.3390/ma10121394

M3 - Article

AN - SCOPUS:85037345004

SN - 1996-1944

VL - 10

JO - Materials

JF - Materials

IS - 12

ER -

Grain refinement kinetics in a low alloyed Cu-Cr-Zr alloy subjected to large strain deformation

Abstract

Keywords

Access to Document

Fingerprint

Cite this