Reinforcement shape effects on the fracture behavior and ductility of particulate-reinforced 6061-Al matrix composites

Journal Article · Fri Nov 01 04:00:00 EST 1996 · Metallurgical and Materials Transactions. A, Physical Metallurgy and Materials Science

DOI:https://doi.org/10.1007/BF02595465· OSTI ID:413303

Song, S G; Shi, N; Gray, III, G T; Roberts, J A ^[1]

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1. Los Alamos National Lab., NM (United States)

Particle shape effects on the fracture and ductility of a spherical and an angular particulate-reinforced 6061-Al composite containing 20 pct vol Al{sub 2}O{sub 3} were studied using scanning electron microscopy (SEM) fractography and modeled using the finite element method (FEM). The spherical particulate composite exhibited a slightly lower yield strength and work hardening rate but a considerably higher ductility than the angular counterpart. The SEM fractographic examination showed that during tensile deformation, the spherical composite failed through void nucleation and linking in the matrix near the reinforcement/matrix interface, whereas the angular composite failed through particle fracture and matrix ligament rupture. The FEM results indicate that the distinction between the failure modes for these two composites can be attributed to the differences in the development of internal stresses and strains within the composites due to particle shape.

• Sponsoring Organization: USDOE
• OSTI ID: 413303
• Journal Information: Metallurgical and Materials Transactions. A, Physical Metallurgy and Materials Science, Journal Name: Metallurgical and Materials Transactions. A, Physical Metallurgy and Materials Science Journal Issue: 11 Vol. 27; ISSN 1073-5623; ISSN MMTAEB
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALUMINIUM BASE ALLOYS
ALUMINIUM OXIDES
CHROMIUM ADDITIONS
COMPOSITE MATERIALS
CONCENTRATION RATIO
COPPER ADDITIONS
DUCTILITY
FINITE ELEMENT METHOD
FRACTOGRAPHY
FRACTURE PROPERTIES
INTERFACES
IRON ADDITIONS
MAGNESIUM ALLOYS
MANGANESE ADDITIONS
MATHEMATICAL MODELS
MICROSTRUCTURE
POROSITY
SCANNING ELECTRON MICROSCOPY
SILICON ADDITIONS
STRAIN HARDENING
STRAINS
STRESSES
YIELD STRENGTH