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Effects of aging condition on the fracture toughness of 2XXX and 7XXX series aluminum alloy compositesResults are presented on the effects of matrix aging condition (i.e., matrix temper) on the fracture toughness of 2XXX and 7XXX Al matrix alloys reinforced with SiC particulates, and the results are compared with the mechanical behavior. Fracture toughness testing was conducted on fatigue precracked bend specimens, and fracture surfaces were examined using SEM. Results revealed dramatic differences in the effect of matrix microstructure on the fracture properties of the two composite series. In the 7XXX material, the toughness values decreased from the underaged (UA) condition to the overaged (OA) condition by approximately 40 percent, while in the 2XXX series composite, the effect of matrix microstructure was marginal. In the 7XXX series composites, a transition in fracture mode from particle cracking (in UA) to matrix and linear-interface failure (in OA) was observed, while the 2XXX series composite failed predominantly by particle cracking.
Document ID
19890043731
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Manoharan, M.
(Case Western Reserve Univ. Cleveland, OH, United States)
Lewandowski, J. J.
(Case Western Reserve University Cleveland, OH, United States)
Date Acquired
August 14, 2013
Publication Date
March 1, 1989
Publication Information
Publication: Scripta Metallurgica
Volume: 23
ISSN: 0036-9748
Subject Category
Composite Materials
Accession Number
89A31102
Funding Number(s)
CONTRACT_GRANT: NAGW-1193
Distribution Limits
Public
Copyright
Other

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