Effect of structural states in near-surface layers of commercial titanium on its fatigue life and fatigue fracture mechanisms

V. E. Panin, T. F. Elsukova, Yu F. Popkova, Yu I. Pochivalov, Sunder Ramasubbu

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13 Citations (Scopus)

Abstract

Changes of structural states in near-surface layers of α-titanium strongly affect its fatigue life and fatigue fracture mechanisms. In α-titanium subjected to alternate bending a sliding mode crack develops, resulting in slight delamination of the material. Hydrogenation of α-titanium surface layers preserves their sliding mode cracking but greatly enhances their delamination. Nanostructuring of α-titanium surface layers increases their nanohardness and elastic modulus and causes opening mode cracking. The fatigue life of the material after surface hydrogenation decreases three times, and after surface nanostructuring, it increases four times.

Original languageEnglish
Pages (from-to)1-7
JournalPhysical Mesomechanics
Volume18
Issue number1
DOIs
Publication statusPublished - 2015

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Keywords

  • fatigue fracture
  • positive nanostructuring effect
  • role of surface layers
  • titanium

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Mechanics of Materials
  • Materials Science(all)

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