Ceyhun Oskay

Investigation of the microstructural and mechanical property changes of NiAl coated Ni-based superalloys during high temperature exposure


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ISBN:

978-3-8440-7231-0

Series:

Schriftenreihe des DECHEMA-Forschungsinstituts
Herausgeber: DECHEMA-Forschungsinstitut
Frankfurt am Main

Volume:

Keywords:

Ni-based superalloys; NiAl coatings; mechanical properties; oxidation; interdiffusion

Type of publication:

Thesis

Language:

English

Pages:

176 pages

Figures:

88 figures

Weight:

261 g

Format:

21 x 14,8 cm

Bindung:

Paperback

Price:

48,80 € / 61,10 SFr

Published:

March 2020

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Abstract

The present work focused on the determination of the mechanical behavior of aluminized Ni-based superalloys with respect to their microstructural degradation during high temperature exposure. For this purpose, a mechanical model concept was developed, which utilized Al-concentration as the major influential parameter. Mechanical properties were determined using experimental methods and were correlated with the Al-content. These experimental results were then conveyed into a software tool, which was used to determine the load-bearing capability of the coated components below and above the ductile to brittle transition temperature (DBTT) of the coating as a function of exposure duration, temperature, component and coating thickness as well as the Al-concentration in the as-deposited coating.