Detail publikace

Identification of Acoustic Emission Sources in Early Stages of Fatigue Process of Inconel 713LC

VLAŠIC, F. BÁRTKOVÁ, D. MAZAL, P.

Originální název

Identification of Acoustic Emission Sources in Early Stages of Fatigue Process of Inconel 713LC

Typ

článek ve sborníku ve WoS nebo Scopus

Jazyk

angličtina

Originální abstrakt

Inconel 713LC is low carbon variant of Inconel 713 nickel-based cast alloy. The biggest advantage of these alloys is their ability to resist a wide variety of operating conditions (corrosive environment, high temperature, high stresses). Main area of applications is aircraft, energetic, chemical and petrochemical industry etc. In many applications, components undergo cyclic stresses. This study presents results of acoustic emission response of Inconel 713LC during high-cycle fatigue testing. In comparison with low-cycle fatigue, stage of initiation of micro cracks is in high-cycle region much more significant and can take several tens of percent of whole fatigue life. This work is focused on comparison of selected parameters of acoustic emission signal in pre-initiation and initiation stage of fatigue crack creation. Signal data were specified by linear location technique, hence only signal from shallow notch was analysed. Acoustic emission signal was correlated with frequency of load reversals which is a function of specimen's rigidity (modulus). Acoustic emission hits with higher stress were detected in pre-initiation stage whereas initiation stage hits exhibited low stress. Acoustic emission signal measurements are supplemented by fractographic and metallographic analysis.

Klíčová slova

acoustic emission method, stages of fatigue, crack

Autoři

VLAŠIC, F.; BÁRTKOVÁ, D.; MAZAL, P.

Rok RIV

2014

Vydáno

3. 9. 2014

Nakladatel

DGZfP and EWGAE

Místo

Dresden, Germany

ISBN

978-3-940283-63-4

Kniha

31st Conference of the European Working Group on Acoustic Emission (EWGAE)

Edice

2014

Číslo edice

1

Strany od

P3-1

Strany do

P3-7

Strany počet

7