0
Research Papers

# Characterization of Process for Embedding SiC Fibers in Al 6061 O Matrix Through Ultrasonic Consolidation

[+] Author and Article Information
Dezhi Li1

Rapid Manufacturing Research Group, Wolfson School of Mechanical and Manufacturing Engineering, Loughborough University, Loughborough LE11 3TU, UKd.li@lboro.ac.uk

Rupert C. Soar

Rapid Manufacturing Research Group, Wolfson School of Mechanical and Manufacturing Engineering, Loughborough University, Loughborough LE11 3TU, UK

1

Corresponding author.

J. Eng. Mater. Technol 131(2), 021016 (Mar 09, 2009) (6 pages) doi:10.1115/1.3030946 History: Received December 13, 2007; Revised October 07, 2008; Published March 09, 2009

## Abstract

In this paper, continuous SiC fibers were embedded in an Al 6061 O matrix through ultrasonic consolidation at room temperature. The optimum embedding parameters were determined through peel tests and metallographic analysis. The influence of the embedded fiber volume fraction and base metal thickness on the interface bond strength was studied, and the fiber/matrix bond strength was tested through fiber pullout test. The results showed that embedding $≥0.8%$ volume fraction of SiC fiber in a 6061 O matrix could significantly increase and even its interfacial strength, but there is a threshold for embedded fiber volume fraction at specific parameters, over which the plastic flow and friction may be insufficient to have a strong bond at foil/foil interfaces between fibers. The study also showed that base metal thickness did not have significant influence on the interfacial strength with an exception of samples with a base metal thickness of $500 μm$. Based on the results, it was proposed that microfriction at consolidation interfaces plays an important role for joint formation, and localized plastic flow around fibers is important to have fibers fully and safely embedded.

<>
Topics: Fibers , Bond strength

## Figures

Figure 10

General process windows for consolidating Al 6061 O and embedding SiC fibers in this matrix through UC

Figure 11

Microstructures of samples with 17 SiC fibers embedded at 34.5 mm/s consolidation speed (before etching), (a) 155.8 MPa, 8.4 μm, and (b) 155.8 MPa, 12.3 μm

Figure 12

Microstructures of samples with different number of SiC fibers embedded at 155.8 MPa, 12.3 μm, and 34.5 mm/s consolidation speed (after etching), (a) monolithic, (b) 5 SiC, (c) 9 SiC, and (d) 17 SiC

Figure 13

Interfacial microstructures of samples with 17 SiC fiber embedded at 155.8 MPa, (a) 8.4 μm and (b) 12.3 μm, and 34.5 mm/s consolidation speed (after etching)

Figure 14

Peel fracture interfaces of samples with different numbers of SiC fibers embedded at 155.8 MPa pressure, 34.5 mm/s traverse speed, and different amplitudes; fiber numbers: (a) monolithic, (b) 5 fibers, (c) and (e) 9 fiber, (d) and (f) 17 fibers; amplitude: (a)–(d) 12.3 μm and (e) and (f) 8.4 μm

Figure 1

Schematics for peel test apparatus

Figure 2

Typical peel curves for consolidated 6061 O samples

Figure 3

Fiber pullout test apparatus

Figure 4

Maximum peel force of samples with one SiC fiber embedded at different pressures, amplitudes, and traverse speeds

Figure 5

Ultimate tensile force of SiC fiber and ultimate pull force of samples with one SiC fiber embedded with different parameters

Figure 6

Maximum peel force comparison for monolithic samples and sample with 1 SiC fiber embedded

Figure 7

Maximum peel force of samples embedded with different volume fractions of SiC fibers at 34.5 mm/s traverse speed

Figure 8

Maximum peel force of samples with different base metal thicknesses and one SiC fiber embedded at 34.5 mm/s traverse speed

Figure 9

Fracture interfaces of samples with one SiC fiber embedded at 34.5 mm/s consolidation speed and different pressures and amplitudes; (a) 135.1 MPa, 6.8 μm, (b) 176.3 MPa, 6.8 μm, (c) 135.1 MPa, 10.4 μm, (d) 155.8 MPa, 8.4 μm, (e) 155.8 MPa,14.3 μm, and (f) 176.3 MPa, 14.3 μm

## Errata

Some tools below are only available to our subscribers or users with an online account.

### Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related Proceedings Articles
Related eBook Content
Topic Collections