The effect of crystallographic grain orientation of polycrystalline Ti on ploughing under scratch testing

Artur Shugurov, Alexey Panin, Andrey Dmitriev, Anton Nikonov

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12 Citations (Scopus)

Abstract

Plastic ploughing of polycrystalline Ti samples subjected to scratching was studied experimentally and using molecular dynamic simulation. Crystallographic orientation of Ti grains is found to substantially affect the formation of pile-ups at scratch flanks and the residual depth of scratch grooves. This effect is concerned with the difference in plasticity of the grains with different orientations in the zone of a tribological contact. It is shown that the most preferred grain orientations in terms of enhancement of their resistance to abrasive wear are those that can favor strain hardening of the material in the scratch groove. The applicability of the H/E and H3/E2 ratios for the prediction of resistance of grains with different orientations to abrasive wear is investigated. It is found that the H/E ratio provides better agreement with the residual depth of scratch grooves than the hardness or H3/E2 ratio.

Original languageEnglish
Pages (from-to)214-221
Number of pages8
JournalWear
Volume408-409
DOIs
Publication statusPublished - 15 Aug 2018

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Keywords

  • Molecular dynamics
  • Plasticity
  • Scratch testing
  • Structure
  • Titanium

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Mechanics of Materials
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films
  • Materials Chemistry

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