Publication detail

Study of Initial Stages of Fatigue Process Using Non-destructive Testing Methods

VLAŠIC, F. VOLÁK, J. NOHÁL, L. MAZAL, P. HORT, F.

Original Title

Study of Initial Stages of Fatigue Process Using Non-destructive Testing Methods

Type

journal article in Web of Science

Language

English

Original Abstract

This paper deals with the basic research of cyclic damage during the initial stages of fatigue process using the non-destructive testing methods. The acoustic emission method was used for monitoring of the microstructure changes during fatigue loading. The electrical potential measurements of specimen and microscopic observation were used mainly to detect the first short cracks and their propagation. The fatigue tests at room temperature were conducted on titanium alloy and creep-resistant steel specimens under bending and tension loading. The aim of the study was to compare the acoustic emission signal at different types of loading until fracture and to analyze in detail the signal changes in initial stages of fatigue process. This analysis was primarily based on the waveform similarity and division into classes. The results show the high sensitivity of the acoustic emission technology in the transition from the stage of surface relief evolution to the stage of crack nucleation and propagation.

Keywords

fatigue loading, acoustic emission signal, surface relief evolution, crack

Authors

VLAŠIC, F.; VOLÁK, J.; NOHÁL, L.; MAZAL, P.; HORT, F.

RIV year

2014

Released

1. 1. 2014

Publisher

Trans Tech Publications

Location

Switzerland

ISBN

1013-9826

Periodical

Key Engineering Materials (print)

Year of study

592-593

Number

553

State

Swiss Confederation

Pages from

553

Pages to

556

Pages count

4

BibTex

@article{BUT100973,
  author="František {Vlašic} and Josef {Volák} and Libor {Nohál} and Pavel {Mazal} and Filip {Hort}",
  title="Study of Initial Stages of Fatigue Process Using Non-destructive Testing Methods",
  journal="Key Engineering Materials (print)",
  year="2014",
  volume="592-593",
  number="553",
  pages="553--556",
  doi="10.4028/www.scientific.net/KEM.592-593.553",
  issn="1013-9826"
}