Transformations of the microstructure and phase compositions of titanium alloys during ultrasonic impact treatment. Part i. commercially pure titanium

Alexey Panin, Andrey Dmitriev, Anton Nikonov, Marina Kazachenok, Olga Perevalova, Elena Sklyarova

Research output: Contribution to journalArticlepeer-review

Abstract

Experimental and theoretical studies helped to reveal patterns of surface roughening and the microstructure refinement in the surface layer of commercial pure titanium during ultrasonic impact treatment. Applying transmission electron microscopy technique, a gradient microstructure in the surface layer of the ultrasonically treated sample, where the grain size is varied from nano-to micrometers was revealed. It was shown that the surface plastic strains of the titanium sample proceeded according to the plastic ploughing mechanism, which was accompanied by dislocation sliding, twinning, and the transformations of the microstructure and phase composition. The molecular dynamics method was applied to demonstrate the mechanism of the phase transformations associated with the formation of stacking faults, as well as the reversible displacement of atoms from their sites in the hcp lattice, causing a change in coordination numbers. The role of the electronic subsystem in the development of the strain-induced phase transformations during ultrasonic impact treatment was discussed.

Original languageEnglish
Article number562
JournalMetals
Volume11
Issue number4
DOIs
Publication statusPublished - Apr 2021

Keywords

  • Electronic structure
  • Microstructure
  • Molecular dynamics
  • Phase transformation
  • Titanium
  • Transmission electron microscopy
  • Ultrasonic impact treatment

ASJC Scopus subject areas

  • Materials Science(all)

Fingerprint Dive into the research topics of 'Transformations of the microstructure and phase compositions of titanium alloys during ultrasonic impact treatment. Part i. commercially pure titanium'. Together they form a unique fingerprint.

Cite this