Plastic instability of platinum modified and unmodified aluminide coatings during 1100 C cyclic testing
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Authors
McCloskey, Margaret Ann
Subjects
Turbine blade coatings
Platinum-Aluminides
Diffusion coatings
IN-738
Coating plastic instability
Rumpling
Platinum-Aluminides
Diffusion coatings
IN-738
Coating plastic instability
Rumpling
Advisors
Boone, Donald H.
Date of Issue
1987-09
Date
September 1986
Publisher
Monterey, California: U.S. Naval Postgraduate School
Language
en_US
Abstract
In a study conducted at the Naval Postgraduate School on the effect of cyclic oxidation at 1100C on platinum modified and unmodified aluminide coated nickel base superalloy (I-738), a surface deformation described as rumpling was first reported. Rumpling was found to be a function of the number and type of thermal strain cycles, thermal expansion mismatch, coating strength and coating thickness. Further testing to determine the mechanical and protectivity impact of rumpling has been conducted. In addition, a concurrent study of the beta(NiAl) phase degradation was undertaken.
Type
Thesis
Description
Series/Report No
Department
Mechanical Engineering
Organization
Naval Postgraduate School (U.S.)
Identifiers
NPS Report Number
Sponsors
Funding
Format
60 p.
Citation
Distribution Statement
Approved for public release; distribution is unlimited.
Rights
This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.