Nanomechanical Properties of Aluminum 390-T6 Rough Surfaces Undergoing Tribological Testing

[+] Author and Article Information
Shaun R. Pergande, Andreas A. Polycarpou

Department of Mechanical and Industrial Engineering, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA

Thomas F. Conry

Department of General Engineering, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA

J. Tribol 126(3), 573-582 (Jun 28, 2004) (10 pages) doi:10.1115/1.1698949 History: Received February 24, 2003; Revised August 12, 2003; Online June 28, 2004
Copyright © 2004 by ASME
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52100 steel pin sample: (a) photograph of contacting surface; (b) profile of contacting surface
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Al390-T6 scuffed disk sample: (a) photograph showing the overall wear track; (b) 50× magnification SEM image showing the primary wear track
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Surface microstructure of Al390-T6 disk sample: (1) silicon grains; (2) silicon-rich SiAl compound; (3) mix of Al, Fe, Mn, Cu and Ni; (4) CuAl compound; (5) aluminum matrix
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Silicon “100” nanoindentation load-displacement curves, 90 deg cube corner tip
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Silicon “100” nanoindentation data: (a) hardness; (b) reduced elastic modulus
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Average Vickers hardness values for all samples
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Cross-section SEM images of scuffed Al390-T6 surface: (1) silicon grains; (2) silicon-rich SiAl compound; (5) aluminum matrix; (6) Blotchy area; (a) 50 μm scale, (b) 3 μm scale
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Nanoindentation on Al390-T6 sample (virgin surface) using 90 deg cube corner tip: (a) typical AFM image of residual nanoindentation mark; (b) typical load-displacement curves
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Nanomechanical properties of virgin Al390-T6 versus contact depth: (a) hardness; (b) reduced elastic modulus
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Hardness versus depth of Al390-T6 over multiple length scales, virgin surface: The nanoindentation data are plotted versus contact depth, hc, and the Vickers and Rockwell B data are plotted versus residual depth
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Nanoindentation hardness versus contact depth of scuffed Al390-T6 surface
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Nanoindentation hardness-to-depth linear trend lines for all Al390-T6 samples
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Typical nanoindentation load-displacement curve and associated parameters




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