Acoustic emission during fatigue crack propagation in SiC particle reinforced Al matrix composites

Journal Article · Fri Dec 01 04:00:00 EST 1995 · Metallurgical Transactions, A

DOI:https://doi.org/10.1007/BF02669447· OSTI ID:205252

Niklas, A; Froyen, L; Wevers, M; Delaey, L ^[1]

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1. K.U. Leuven (Belgium). Dept. of Metallurgy and Materials Engineering

The acoustic emission (AE) behavior during fatigue propagation in aluminum 6061 and aluminum 6061 matrix composites containing 5, 10, and 20 wt pct SiC particle reinforcement was investigated under tension-tension fatigue loading. The purpose of this investigation was to monitor fatigue crack propagation by the AE technique and to identify the source(s) of AE. Most of the AEs detected were observed at the top of the load cycles. The cumulative number of AE events was found to correspond closely to the fatigue crack growth and to increase with increasing SiC content. Fractographic studies revealed an increasing number of fractured particles and to a lesser extent decohered particles on the fatigue fracture surface as the crack propagation rate (e.g., {Delta}K) or the SiC content was increased.

• Sponsoring Organization: USDOE
• OSTI ID: 205252
• Report Number(s): CONF-940204--
• Journal Information: Metallurgical Transactions, A, Journal Name: Metallurgical Transactions, A Journal Issue: 12 Vol. 26; ISSN MTTABN; ISSN 0360-2133
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALUMINIUM BASE ALLOYS
CHEMICAL COMPOSITION
COMPOSITE MATERIALS
CRACK PROPAGATION
FATIGUE
FRACTOGRAPHY
MICROSTRUCTURE
NOTCHES
OPTICAL MICROSCOPY
PARTICLE SIZE
SCANNING ELECTRON MICROSCOPY
SILICON CARBIDES
SOUND WAVES
TENSILE PROPERTIES