Microstructure transformation in a cast Cu-Fe alloy at high pressure torsion deformation

A. Lukyanov, A. Churakova, D. Gunderov, A. Filatov, E. Antipov, V. Sitdikov, A. Ganeev, R. Valiev, V. Pushin

Research output

Abstract

The effect of high pressure torsion (HPT) on the microstructure of Cu-Fe 36 wt.% alloy has been studied. The initial Cu-Fe alloy has a dendritic structure, the length of dendrites is up to 100 μm. As a result of HPT (20 anvil revolutions at 400 °C) a nanostructural state is formed. The average size of the Cu and α-Fe grains is 60 and 35 nm correspondingly. The volume fraction of the Fe phase reduces from the initial 37% down to 15% after HPT. The concentration of iron dissolved in the copper lattice reaches 20%. The subsequent annealing at 700 °C for 1 hour results in some coarsening of α-Fe particles, as compared to the state after HPT. However, the typical dendritic structure of the cast alloy does not recover; it remains dispersed with the size of α-Fe particles less than 20 μm. As a result of HPT the alloy microhardness increased from 1800 to 4000 MPa. The subsequent annealing at T = 700 °C decreased the microhardness to 2700 MPa, but this value is 1.5 times higher than that in the initial as cast state.

Original languageEnglish
Pages (from-to)20-27
Number of pages8
JournalReviews on Advanced Materials Science
Volume45
Issue number1-2
Publication statusPublished - 1 Jan 2016

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Torsional stress
torsion
casts
microstructure
Microstructure
Microhardness
microhardness
Annealing
annealing
cast alloys
Coarsening
dendrites
anvils
Copper
Volume fraction
Iron
iron
copper

Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics

Cite this

Lukyanov, A., Churakova, A., Gunderov, D., Filatov, A., Antipov, E., Sitdikov, V., ... Pushin, V. (2016). Microstructure transformation in a cast Cu-Fe alloy at high pressure torsion deformation. Reviews on Advanced Materials Science, 45(1-2), 20-27.
Lukyanov, A. ; Churakova, A. ; Gunderov, D. ; Filatov, A. ; Antipov, E. ; Sitdikov, V. ; Ganeev, A. ; Valiev, R. ; Pushin, V. / Microstructure transformation in a cast Cu-Fe alloy at high pressure torsion deformation. In: Reviews on Advanced Materials Science. 2016 ; Vol. 45, No. 1-2. pp. 20-27.
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Lukyanov, A, Churakova, A, Gunderov, D, Filatov, A, Antipov, E, Sitdikov, V, Ganeev, A, Valiev, R & Pushin, V 2016, 'Microstructure transformation in a cast Cu-Fe alloy at high pressure torsion deformation', Reviews on Advanced Materials Science, vol. 45, no. 1-2, pp. 20-27.

Microstructure transformation in a cast Cu-Fe alloy at high pressure torsion deformation. / Lukyanov, A.; Churakova, A.; Gunderov, D.; Filatov, A.; Antipov, E.; Sitdikov, V.; Ganeev, A.; Valiev, R.; Pushin, V.

In: Reviews on Advanced Materials Science, Vol. 45, No. 1-2, 01.01.2016, p. 20-27.

Research output

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T1 - Microstructure transformation in a cast Cu-Fe alloy at high pressure torsion deformation

AU - Lukyanov, A.

AU - Churakova, A.

AU - Gunderov, D.

AU - Filatov, A.

AU - Antipov, E.

AU - Sitdikov, V.

AU - Ganeev, A.

AU - Valiev, R.

AU - Pushin, V.

PY - 2016/1/1

Y1 - 2016/1/1

N2 - The effect of high pressure torsion (HPT) on the microstructure of Cu-Fe 36 wt.% alloy has been studied. The initial Cu-Fe alloy has a dendritic structure, the length of dendrites is up to 100 μm. As a result of HPT (20 anvil revolutions at 400 °C) a nanostructural state is formed. The average size of the Cu and α-Fe grains is 60 and 35 nm correspondingly. The volume fraction of the Fe phase reduces from the initial 37% down to 15% after HPT. The concentration of iron dissolved in the copper lattice reaches 20%. The subsequent annealing at 700 °C for 1 hour results in some coarsening of α-Fe particles, as compared to the state after HPT. However, the typical dendritic structure of the cast alloy does not recover; it remains dispersed with the size of α-Fe particles less than 20 μm. As a result of HPT the alloy microhardness increased from 1800 to 4000 MPa. The subsequent annealing at T = 700 °C decreased the microhardness to 2700 MPa, but this value is 1.5 times higher than that in the initial as cast state.

AB - The effect of high pressure torsion (HPT) on the microstructure of Cu-Fe 36 wt.% alloy has been studied. The initial Cu-Fe alloy has a dendritic structure, the length of dendrites is up to 100 μm. As a result of HPT (20 anvil revolutions at 400 °C) a nanostructural state is formed. The average size of the Cu and α-Fe grains is 60 and 35 nm correspondingly. The volume fraction of the Fe phase reduces from the initial 37% down to 15% after HPT. The concentration of iron dissolved in the copper lattice reaches 20%. The subsequent annealing at 700 °C for 1 hour results in some coarsening of α-Fe particles, as compared to the state after HPT. However, the typical dendritic structure of the cast alloy does not recover; it remains dispersed with the size of α-Fe particles less than 20 μm. As a result of HPT the alloy microhardness increased from 1800 to 4000 MPa. The subsequent annealing at T = 700 °C decreased the microhardness to 2700 MPa, but this value is 1.5 times higher than that in the initial as cast state.

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Lukyanov A, Churakova A, Gunderov D, Filatov A, Antipov E, Sitdikov V et al. Microstructure transformation in a cast Cu-Fe alloy at high pressure torsion deformation. Reviews on Advanced Materials Science. 2016 Jan 1;45(1-2):20-27.