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The Fracture Behavior of SiCp/Aluminum Alloy Composites With And Without Large Al-Particles

Published online by Cambridge University Press:  10 February 2011

A. B. Pandey ,
B. S. Majumdar  and
D. B. Miracle
A. B. Pandey
Affiliation:
Systran Corporation, 4126 Linden Avenue, Dayton, OH 45432, and on leave from Defense Metallurgical Research Laboratory
B. S. Majumdar
Affiliation:
UES, Inc.,4401 Dayton-Xemnia Road, Dayton, OH 45432
D. B. Miracle
Affiliation:
Wright Laboratory, Materials Directorate, Wright-Patterson AFB, OH 45433
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Abstract

JIc measurements were performed on a SiCp/Al-7093 MMC with controlled heat treatments, and the damage mechanisms were evaluated to understand the influence of microstructural parameters on the fracture toughness and crack resistance behavior. The deformed materials showed widely different damage and flow localization for different matrix microstructures. In an effort to improve fracture toughness, large Al particles were incorporated into the powder-metallurgy based MMC, and extruded to obtain pancake shaped Al phases. In the extruded condition, the effect of Al particles on the crack initiation toughness was negligible. However, significant improvement in the toughness was observed when the extruded material was further rolled. These issues are discussed in the context of observed deformation and damage mechanisms.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 434: Symposium U – Layered Materials for Structural Applications , 1996 , 249
Copyright
Copyright © Materials Research Society 1996

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