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Title
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Mechanisms Associated With Long Time Creep Phenomena. Part II: Evaluation Of Long Time Creep Results.
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Date
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1967
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Index Abstract
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Not Available
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Photo Quality
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Complete
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Report Number
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AFML TR 65-181 Part 2
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Creator
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Widmer, R.
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Dhosi, J. M.
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Grant, N. J.
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Corporate Author
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New England Materials laboratory, Inc.
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Laboratory
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Air Force Materials Laboratory
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Extent
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132
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Identifier
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AD0815679
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Access Rights
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Export Control
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Distribution Classification
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1
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Contract
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AF 33(615)-2452
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DoD Project
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7351 - Metallic Materials
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DTIC Record Exists
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No
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Distribution Change Authority Correspondence
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USAF LTR
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Abstract
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A creep-rupture investigation was conducted on two (2) high temperature alloys: a nickel-base age hardened alloy, Udimet 500, and a cobalt-base alloy, L-605. Creep-rupture tests were conducted over a range of rupture lives from 1 - 35,000 hours at 1200, 1350, 1500, 1650 at 1800 degrees F. Some long time tests are in progress and lives of approximately 50,000 hours are expected. The microstructure of all broken specimens was examined with various techniques and an attempt was made to correlate specific structural changes with the mechanical properties. Several different parameter techniques were examined to determine their utility in correlating and extrapolating creep and rupture data. The strength and the limitations of parametric extrapolation was extensively discussed with the example of the Manson-Haford parameter for which a computer program was available.
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Report Availability
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Full text available
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DoD Task
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735106 - Behavior of Metals
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Date Issued
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1967-03
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Provenance
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Lockheed Martin Missiles & Fire Control
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Type
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report
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Format
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1 online resource
AFMLTR65-181part02.pdf