Publication detail

Monitoring and Evaluation of Cyclic Damage in Preinitiation Stages of Fatigue Process Using Nondestructive Testing Methods

VLAŠIC, F. KOULA, V. MAZAL, P. GEJDOŠ, P.

Original Title

Monitoring and Evaluation of Cyclic Damage in Preinitiation Stages of Fatigue Process Using Nondestructive Testing Methods

Type

conference paper

Language

English

Original Abstract

This paper treats the evaluation of fatigue damage appearing during the cyclic bending loading of the samples of titanium Grade 2 and Grade 5 (Ti6Al4V). Purpose was to detect the microstructural changes in pre-initiation stage (the stage before creation or identification of short cracks) during the fatigue loading using acoustic emission method and electron microscopy. Microscopic observation was used mainly to detect of the first short (micro) cracks. The measurement was completed with analysis of loading (resonance) frequency changes of the fatigue test device. In the acoustic emission signal we have found some changes, which can correlate with the evolution of dislocation structures or the creation of the surface relief in pre-initiation stage. The measurement results verification will be based on detailed observation of the material surface by electron microscopy and Xray diffraction in other research.

Keywords

acoustic emission, fatigue damage, crack, microstructural changes

Authors

VLAŠIC, F.; KOULA, V.; MAZAL, P.; GEJDOŠ, P.

RIV year

2012

Released

12. 9. 2012

Publisher

University of Granada and EWGAE

Location

Granada, Spain

ISBN

978-84-615-9941-7

Book

Proceedings of the 30th European Conference on Acoustic Emission Testing & 7th International Conference on Acoustic Emission EWGAE 30/ ICAE 7 Granada, September 2012

Edition

2012

Edition number

1

Pages from

111-1

Pages to

111-13

Pages count

13