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Record Details

Record 27 of 42787
Non-Contact Measurements of Creep Properties of Refractory Materials
Author and Affiliation:
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)
Abstract: State-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.
Publication Date: Jan 01, 2006
Document ID:
20060016347
(Acquired Jun 09, 2006)
Subject Category: METALS AND METALLIC MATERIALS
Document Type: Conference Paper
Meeting Information: The Minerals, Metals and Materials Society meeting; 13-16 Mar. 2006; San Antonio, TX; United States
Financial Sponsor: NASA Marshall Space Flight Center; Huntsville, AL, United States
Organization Source: NASA Marshall Space Flight Center; Huntsville, AL, United States
Description: 1p; In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: No Copyright
NASA Terms: LEVITATION; NUCLEAR ELECTRIC PROPULSION; HYPERSONIC AIRCRAFT; HIGH TEMPERATURE; CREEP PROPERTIES; JET ENGINES; ELECTROSTATICS; REFRACTORY MATERIALS; TUNGSTEN; NIOBIUM
Availability Source: Other Sources
Availability Notes: Abstract Only
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