Staging of a localized plastic deformation upon the tension of 16AT alloy specimens on the basis of acoustic emission, surface deformation mapping, and strain gauging data. II. Specimens with notches of different depths

S. V. Panin, A. V. Byakov, P. S. Lyubutin, O. V. Bashkov

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Studies of the development of deformations and damage in 16AT alloy specimens with side notches, which modeled cracks in objects, were performed by combining the acoustic emission, surface deformation mapping, and strain gauging methods. It was shown that a significant portion of the loading time is associated with crack propagation, which is accompanied by the appearance of a segment with a negative value of the strain strengthening coefficient in loading diagrams. According to the data from the correlation of digital images at the plastic deformation stage (within stage 2), two substages were distinguished: the first is related to the deformation localization directly at the notch apex, while the second is associated with an increase in the area of this region to dimensions that are comparable with the specimen cross section. It was revealed that, in the case of a significantly localized deformation, the staging-based approach to the analysis of deformation and fracturing processes is characterized by the better correlation between data that are recorded by different in situ methods.

Original languageEnglish
Pages (from-to)815-823
Number of pages9
JournalRussian Journal of Nondestructive Testing
Volume47
Issue number12
DOIs
Publication statusPublished - 1 Dec 2011

Keywords

  • Acoustic emission
  • Localized deformation
  • Shear deformation intensity
  • Strain gauging
  • Stress concentrator

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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