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Extending Fatigue Lives Of Selected AlloysRejuvenating treatments demonstrated. Experiments with three alloys show some combinations of heat treatment, hot isostatic pressing, and/or surface treatment extends cycle lives of fatigue-damaged or fatigue-precracked specimens. For each alloy, tests were first done to determine "baseline" high-cycle-fatigue lives and high-cycle-fatigue failure modes over range of test conditions. Controlled fatigue damage introduced into specimens. Damaged specimens subjected to candidate rejuvenating treatments, then tested to failure. Effectiveness of each treatment judged by comparing fatigue data of damaged and treated specimens to "baseline" fatigue and data taken at same test conditions.
Document ID
19880000284
Acquisition Source
Legacy CDMS
Document Type
Other - NASA Tech Brief
Authors
Matejczyk, D. E.
(Rockwell International Corp.)
Date Acquired
August 13, 2013
Publication Date
May 1, 1988
Publication Information
Publication: NASA Tech Briefs
Volume: 12
Issue: 5
ISSN: 0145-319X
Subject Category
Materials
Report/Patent Number
MFS-27131
Accession Number
88B10284
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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