Microstructure and grain-boundary spectrum of ultrafine-grained nickel produced by severe plastic deformation

A. P. Zhilyaev, M. D. Baro, Zenji Horita, J. A. Szpunar, T. G. Langdon

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)

Abstract

The effect of severe plastic deformation on the evolution of the microstructure and the grain-boundary ensemble in ultrafine-grained (UFG) nickel is studied. Torsion under quasi-hydrostatic pressure can produce a uniform UFG structure such that both the microstructure and grain-boundary ensemble are statistically uniform over the whole volume of a sample. The experimental results on relaxation processes in the UFG nickel produced by both severe plastic deformation and electrodeposition are presented. The grain-growth kinetics in the UFG nickel produced by equal-channel angular pressing is studied. The grain-growth activation energy is found to coincide with the activation energy of grain-boundary self-diffusion. The experimental results on the evolution of the grain-boundary spectrum upon annealing of the UFG nickel produced by torsion are described. The activation energy and stored enthalpy for the UFG nickel are measured by differential scanning photometry.

Original languageEnglish
Pages (from-to)60-74
Number of pages15
JournalRussian Metallurgy (Metally)
Volume2004
Issue number1
Publication statusPublished - Jan 1 2004

All Science Journal Classification (ASJC) codes

  • Metals and Alloys

Fingerprint Dive into the research topics of 'Microstructure and grain-boundary spectrum of ultrafine-grained nickel produced by severe plastic deformation'. Together they form a unique fingerprint.

Cite this