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Author Saletes, I. ♦ Filleter, T. ♦ Goldbaum, D. ♦ Chromik, R. R. ♦ Sinclair, A. N.
Source SpringerLink
Content type Text
Publisher Springer US
File Format PDF
Copyright Year ©2014
Language English
Subject Domain (in DDC) Technology ♦ Engineering & allied operations
Subject Keyword cold shot ♦ casting defect ♦ nickel based superalloys ♦ oxidation ♦ mechanical characterization ♦ corrosion and wear ♦ Characterization and Evaluation of Materials ♦ Tribology, Corrosion and Coatings ♦ Quality Control, Reliability, Safety and Risk ♦ Engineering Design
Abstract The presence of a cold shot in an aircraft turbine blade can lead to the catastrophic failure of the blade and ultimately to the failure of the power plant. Currently, no nondestructive evaluation (NDE) method exists to detect this kind of defect. This deficiency is primarily due to the fact that the only known cold shot defects in existence are those found in failed blades. Therefore, in order to develop effective NDE methods, reference specimens are needed which mimic the embedded oxide layer that is a primary distinguishing feature of a cold shot. Here, we present a procedure to synthetically reproduce the features of a real cold shot in Inconel 600 and the precise characterization of this oxide layer as a reference specimen suitable for NDE evaluation. As a first step to develop a suitable NDE technique, high-frequency ultrasound simulations are considered. A theoretical 1-D model is developed in order to quantify the multiple reflection-transmission trajectory of the acoustic wave in the reference specimen. This paper also presents an experimental determination of the density and the Young’s modulus of the Inconel 600 oxide, which are required as inputs to calculate the acoustic impedance used in the theoretical model.
ISSN 10599495
Age Range 18 to 22 years ♦ above 22 year
Educational Use Research
Education Level UG and PG
Learning Resource Type Article
Publisher Date 2014-12-04
Publisher Place Boston
e-ISSN 15441024
Journal Journal of Materials Engineering and Performance
Volume Number 24
Issue Number 2
Page Count 10
Starting Page 875
Ending Page 884

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Source: SpringerLink