THE RESEARCH OF DEFECTS – STRESS CONCENTRATORS BY THE ACOUSTIC EMISSION PARAMETERS AT THE PROCESS OF DAMAGE DEVELOPMENT

O V Bashkov,S Z Lonchakov,V I Murav’Ev,A V Frolov

doi:10.17073/0368-0797-2015-12-912-918

Abstract

The paper presents the results of the theoretical and experimental investigation of the influence of stress concentrators on the damaging of titanium alloys. The samples of ОТ4 (α-class) and VТ3-1 (α + β-class) titanium alloys with different radii of stress concentrators have been researched. It has been also estimated the influence of stress concentration on the parameters of acoustic emission when using the samples of different radii. In the article the authors have described the graphic dependence of the material volume, getting involved into the deformation, on the distribution of maximum local stresses and the distribution diagram of the main AE parameters for the samples with different radii of stress concentrators from ОТ4 and VTЗ-1 alloys in dependence on the nominal failing stress. The results of the theoretical and experimental investigation of the influence of stress concentrators α on the damaging of ОТ4 and VT3-1 titanium alloy have been given. The research results can be used for the development of construction-diagnostic technique on the point of view of the identification of a less dangerous form of stress concentrator.

Highlights

(Eng.), Professor, Head of Centre of Collective Use “New Materials and Technologies” V.I. Murav’ev, Dr Sci
The samples of ОТ4 (α-class) and VТ3-1 (α + β-class) titanium alloys with different radii of stress concentrators have been researched. It has been estimated the influence of stress concentration on the parameters of acoustic emission when using the samples of different radii
In the article the authors have described the graphic dependence of the material volume, getting involved into the deformation, on the distribution of maximum local stresses and the distribution diagram of the main AE parameters for the samples with different radii of stress concentrators from ОТ4 and VTЗ-1 alloys in dependence on the nominal failing stress

Summary

Introduction

(Eng.), Professor, Head of Centre of Collective Use “New Materials and Technologies” V.I. Murav’ev, Dr Sci. (Eng.), Professor of the Chair “Mechanical Engineering and Metallurgy”, Chief Research Consultant ( vmuravyev@mail.ru ) S.Z. Lonchakov, Cand.

Results

Conclusion