Thermal expansion studies of prestrained Al{sub 2}O{sub 3}/Al metal matrix composite

Journal Article · Wed May 01 04:00:00 EDT 1996 · Acta Materialia

DOI:https://doi.org/10.1016/1359-6454(95)00299-5· OSTI ID:247943

Elomari, S; Boukhili, R ^[1]; Lloyd, D J ^[2]

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1. Ecole Polytechnique de Montreal, Quebec (Canada). Dept. de Genie Mecanique
2. Alcan International Ltd., Kingston, Ontario (Canada)

The present study was undertaken to investigate the effect of prestraining on the coefficient of thermal expansion (CTE) of 10 and 20 volume percent (v/o) Al{sub 2}O{sub 3} particle-reinforced composite over various temperature ranges using thermal mechanical analysis (TMA). The CTE of the composite was shown to be dependent on the volume fraction of the broken particle, plastic yielding and flow, and other transformation processes occurring at elevated temperatures. The experimentally measured values of the CTE were found to be in good agreement with Schapery`s model at various values of plastic prestrain (0--10%) and with a modified Kerner`s equation, at high prestraining ({epsilon}{sub p} > 4%) for a wider temperature range.

• OSTI ID: 247943
• Journal Information: Acta Materialia, Journal Name: Acta Materialia Journal Issue: 5 Vol. 44; ISSN XZ504Y; ISSN 1359-6454
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALUMINIUM ALLOYS
ALUMINIUM OXIDES
CHEMICAL COMPOSITION
COMPOSITE MATERIALS
DAMAGE
MATHEMATICAL MODELS
MICROSTRUCTURE
OPTICAL MICROSCOPY
PLASTICITY
SAMPLE PREPARATION
SCANNING ELECTRON MICROSCOPY
STRAINS
TEMPERATURE DEPENDENCE
THERMAL EXPANSION