Publication detail

Use of acoustic emission method for identification of fatigue micro-cracks creation

MAZAL, P. VLAŠIC, F. KOULA, V.

Czech title

Použití metody akustické emise pro identifikaci tvorby únavových mikrotrhlin

English title

Use of acoustic emission method for identification of fatigue micro-cracks creation

Type

journal article in Web of Science

Language

en

Original abstract

This paper is a contribution to the discussion on the possibilities of identification of the time behaviour of various stages of fatigue lifetime directly during experiments using non-destructive testing methods (mainly acoustic emission method). We focus especially on detection and characterization of the transition from the stage of cycling damage accumulation to micro-cracks creation. In the past years, the laboratory of fatigue properties of FME received and published plenty of information about propagation of damage mainly in Al and Ti alloys. In this paper are presented and compared the results of new experiments with steel used for nuclear reactors and Inconel alloy. This work is focused on comparison of selected parameters of acoustic emission signal in pre-initiation and initiation stage of fatigue crack creation. Acoustic emission hits with higher stress were detected in the pre-initiation stage whereas the initiation stage hits exhibited low stress.

Czech abstract

Tento dokument je příspěvkem k diskusi o možnostech identifikace časového chování v různých stádiích únavového života přímo v průběhu zkoušení s použitím nedestruktivních metod testování (hlavně metody akustické emise). Zaměřujeme se zejména na detekci a charakterizaci přechodu z fáze akumulace cyklického poškození k tvorbě mikrotrhlin. V posledních letech, laboratoř únavových vlastností FSI publikovala řadu informací o kumulaci poškození převážně v Al a Ti slitinách. V tomto dokumentu jsou prezentovány a porovnány výsledky nových experimentů s ocelí používanou pro jaderné reaktory a slitinou niklu. Tato práce je zaměřena na srovnání vybraných parametrů signálu akustické emise v pre-iniciační a iniciační fázi tvorby únavových trhlin.

English abstract

This paper is a contribution to the discussion on the possibilities of identification of the time behaviour of various stages of fatigue lifetime directly during experiments using non-destructive testing methods (mainly acoustic emission method). We focus especially on detection and characterization of the transition from the stage of cycling damage accumulation to micro-cracks creation. In the past years, the laboratory of fatigue properties of FME received and published plenty of information about propagation of damage mainly in Al and Ti alloys. In this paper are presented and compared the results of new experiments with steel used for nuclear reactors and Inconel alloy. This work is focused on comparison of selected parameters of acoustic emission signal in pre-initiation and initiation stage of fatigue crack creation. Acoustic emission hits with higher stress were detected in the pre-initiation stage whereas the initiation stage hits exhibited low stress.

Keywords in Czech

vysokocyklová únava, trhlina, akustická emise, zpracování signálů, oceli pro jaderný reaktor, Inconel

Keywords in English

high cycle fatigue, crack, acoustic emission, signal processing, steel for nuclear reactor, Inconel

RIV year

2015

Released

15.12.2015

Publisher

Elsevier

Location

Senlis

ISSN

1877-7058

Volume

133

Number

1

Pages from–to

379–388

Pages count

10

BIBTEX


@article{BUT119766,
  author="Pavel {Mazal} and František {Vlašic} and Václav {Koula},
  title="Use of acoustic emission method for identification of fatigue micro-cracks creation",
  year="2015",
  volume="133",
  number="1",
  month="December",
  pages="379--388",
  publisher="Elsevier",
  address="Senlis",
  issn="1877-7058"
}