Fracture of aluminium reinforced with densely packed ceramic particles: Influence of matrix hardening

Ali Miserez; Andreas Mortensen

doi:10.1016/j.actamat.2004.07.038

Fracture of aluminium reinforced with densely packed ceramic particles: Influence of matrix hardening

Ali Miserez, Andreas Mortensen^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

39 Citations (Scopus)

Abstract

Al-Cu matrix composites with a high volume fraction of alumina particles (41-62%) prepared by gas-pressure infiltration are characterized in tension and chevron-notch fracture testing before and after heat-treatment. Their mechanical behaviour is shown to depend markedly on the matrix structure and flow stress, and also on the nature and size of the reinforcement particles. Al-Cu matrix composites free of coarse Al₂Cu matrix intermetallics and reinforced with 60 vol% high-strength polygonal alumina particles exhibit strength/toughness combinations that are in the same range as unreinforced high-strength aluminium alloys: the strength of the composites can be increased without decreasing their toughness. The results are interpreted on the basis of current cohesive zone models for crack propagation by microcavitation in elastic-plastic materials.

Original language	English
Pages (from-to)	5331-5345
Number of pages	15
Journal	Acta Materialia
Volume	52
Issue number	18
DOIs	https://doi.org/10.1016/j.actamat.2004.07.038
Publication status	Published - Oct 18 2004
Externally published	Yes

ASJC Scopus Subject Areas

Electronic, Optical and Magnetic Materials
Ceramics and Composites
Polymers and Plastics
Metals and Alloys

Keywords

Cohesive zone models
Fracture toughness
Interfacial phases
Liquid infiltration
Metal matrix composites

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10.1016/j.actamat.2004.07.038

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title = "Fracture of aluminium reinforced with densely packed ceramic particles: Influence of matrix hardening",

abstract = "Al-Cu matrix composites with a high volume fraction of alumina particles (41-62\%) prepared by gas-pressure infiltration are characterized in tension and chevron-notch fracture testing before and after heat-treatment. Their mechanical behaviour is shown to depend markedly on the matrix structure and flow stress, and also on the nature and size of the reinforcement particles. Al-Cu matrix composites free of coarse Al2Cu matrix intermetallics and reinforced with 60 vol\% high-strength polygonal alumina particles exhibit strength/toughness combinations that are in the same range as unreinforced high-strength aluminium alloys: the strength of the composites can be increased without decreasing their toughness. The results are interpreted on the basis of current cohesive zone models for crack propagation by microcavitation in elastic-plastic materials.",

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T1 - Fracture of aluminium reinforced with densely packed ceramic particles

T2 - Influence of matrix hardening

AU - Miserez, Ali

AU - Mortensen, Andreas

PY - 2004/10/18

Y1 - 2004/10/18

N2 - Al-Cu matrix composites with a high volume fraction of alumina particles (41-62%) prepared by gas-pressure infiltration are characterized in tension and chevron-notch fracture testing before and after heat-treatment. Their mechanical behaviour is shown to depend markedly on the matrix structure and flow stress, and also on the nature and size of the reinforcement particles. Al-Cu matrix composites free of coarse Al2Cu matrix intermetallics and reinforced with 60 vol% high-strength polygonal alumina particles exhibit strength/toughness combinations that are in the same range as unreinforced high-strength aluminium alloys: the strength of the composites can be increased without decreasing their toughness. The results are interpreted on the basis of current cohesive zone models for crack propagation by microcavitation in elastic-plastic materials.

AB - Al-Cu matrix composites with a high volume fraction of alumina particles (41-62%) prepared by gas-pressure infiltration are characterized in tension and chevron-notch fracture testing before and after heat-treatment. Their mechanical behaviour is shown to depend markedly on the matrix structure and flow stress, and also on the nature and size of the reinforcement particles. Al-Cu matrix composites free of coarse Al2Cu matrix intermetallics and reinforced with 60 vol% high-strength polygonal alumina particles exhibit strength/toughness combinations that are in the same range as unreinforced high-strength aluminium alloys: the strength of the composites can be increased without decreasing their toughness. The results are interpreted on the basis of current cohesive zone models for crack propagation by microcavitation in elastic-plastic materials.

KW - Cohesive zone models

KW - Fracture toughness

KW - Interfacial phases

KW - Liquid infiltration

KW - Metal matrix composites

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JO - Acta Materialia

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ER -

Fracture of aluminium reinforced with densely packed ceramic particles: Influence of matrix hardening

Abstract

ASJC Scopus Subject Areas

Keywords

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