Microstructure refinement in Cu-Fe alloy using high pressure torsion

A. Lukyanov, A. Churakova, A. Filatov, E. Levin, R. Valiev, D. Gunderov, E. Antipov

Research output: Contribution to journalConference articlepeer-review

9 Citations (Scopus)

Abstract

The effect of high pressure torsion (HPT) on the microstructure evolution 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 gm. As a result of HPT (20 anvil rotations at 400 °C) the refinement of a- Fe dendrites occurs, and a microstructure with Fe inclusions with a size from 0.1 to 5 gm uniformly distributed in the copper matrix forms. Subsequent annealing at 700 °C for 1 hour results in some coarsening of a-Fe particles, as compared to the state after HPT. However, the dendritic structure typical of the cast alloy does not recover; it remains dispersed with a size of a-Fe particles less than 20 gm. 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
Article number012102
JournalIOP Conference Series: Materials Science and Engineering
Volume63
Issue number1
DOIs
Publication statusPublished - 2014
Externally publishedYes
Event6th International Conference on Nanomaterials by Severe Plastic Deformation, NanoSPD 2014 - Metz, France
Duration: 30 Jun 20144 Jul 2014

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