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Modeling the densification of metal matrix composite monotapeWe present a first model that enables prediction of the density (and its time evolution) of a monotape lay-up subjected to a hot isostatic or vacuum hot pressing consolidation cycle. Our approach is to break down the complicated (and probabilistic) consolidation problem into simple, analyzable parts and to combine them in a way that correctly represents the statistical aspects of the problem, the change in the problem's interior geometry, and the evolving contributions of the different deformation mechanisms. The model gives two types of output. One is in the form of maps showing the relative density dependence upon pressure, temperature, and time for step function temperature and pressure cycles. They are useful for quickly determining the best place to begin developing an optimized process. The second gives the evolution of density over time for any (arbitrary) applied temperature and pressure cycle. This has promise for refining process cycles and possibly for process control. Examples of the models application are given for Ti3Al + Nb, gamma TiAl, Ti6Al4V, and pure aluminum.
Document ID
19930068494
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Elzey, D. M.
(NASA Headquarters Washington, DC United States)
Wadley, H. N. G.
(Virginia Univ. Charlottesville, United States)
Date Acquired
August 16, 2013
Publication Date
August 1, 1993
Publication Information
Publication: Acta Metallurgica et Materialia
Volume: 41
Issue: 8
ISSN: 0956-7151
Subject Category
Composite Materials
Accession Number
93A52491
Distribution Limits
Public
Copyright
Other

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