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acoustic emission from a solidifying aluminum-lithium alloyPhysical phenomena associated with the solidification of an AA2090 Al-Li alloy have been characterized by AE methods. Repeatable patterns of AE activity as a function of solidification time are recorded and explained for ultrahigh-purity (UHP) aluminum and an Al-4.7 wt pct Cu binary alloy, in addition to the AA2090 Al-Li alloy, by the complementary utilization of thermal, AE, and metallographic methods. One result shows that the solidification of UHP aluminum produces one discrete period of high AE activity as the last 10 percent of solid forms.
Document ID
19920070024
Document Type
Reprint (Version printed in journal)
Authors
Henkel, D. P.
(NASA Langley Research Center Hampton, VA, United States)
Wood, J. D.
(Lehigh University Bethlehem, PA, United States)
Date Acquired
August 15, 2013
Publication Date
August 1, 1992
Publication Information
Publication: Materials Evaluation
Volume: 50
Issue: 8, Au
ISSN: 0025-5327
Subject Category
QUALITY ASSURANCE AND RELIABILITY
Distribution Limits
Public
Copyright
Other