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Non-Contact Measurements of Creep Properties of Refractory MaterialsState-of-the-art technologies for hypersonic aircraft, nuclear electric/thermal propulsion for spacecraft, and more efficient jet engines are driving ever more demanding needs for high-temperature (>2000 C) materials. At such high temperatures, creep rises as one of the most important design factors to be considered. Since conventional measurement techniques for creep resistance are limited to about 17OO0C, a new technique is in demand for higher temperatures. This paper presents a non-contact method using electrostatic levitation (ESL) which is applicable to both metallic and non-metallic materials. The samples were rotated quickly enough to cause creep deformation by centrifugal acceleration. The deformation of the samples was captured with a high speed camera and then the images were analyzed to estimate creep resistance. Finite element analyses were performed and compared to the experiments to verify the new method. Results are presented for niobium and tungsten, representative refractory materials at 2300 C and 2700 C respectively.
Document ID
20060016347
Acquisition Source
Marshall Space Flight Center
Document Type
Conference Paper
Authors
Lee, Jonghyun
(Massachusetts Univ. MA, United States)
Bradshaw, Richard C.
(Massachusetts Univ. MA, United States)
Hyers, Robert W.
(Massachusetts Univ. MA, United States)
Rogers, Jan R.
(NASA Marshall Space Flight Center Huntsville, AL, United States)
Rathz, Thomas J.
(Alabama Univ. AL, United States)
Wall, James J.
(Tennessee Univ. TN, United States)
Choo, Hahn
(Tennessee Univ. TN, United States)
Liaw, Peter
(Tennessee Univ. TN, United States)
Date Acquired
August 23, 2013
Publication Date
January 1, 2006
Subject Category
Metals And Metallic Materials
Meeting Information
Meeting: The Minerals, Metals and Materials Society meeting
Location: San Antonio, TX
Country: United States
Start Date: March 13, 2006
End Date: March 16, 2006
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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