Particle size effects on the abrasive wear of 20 vol% SiC{sub p}/7075Al composites
- National Tsing Hua Univ., Hsinchu (Taiwan, Province of China). Dept. of Materials Science and Engineering
Discontinuously reinforced aluminum (DRA) composites have many advantages over the unreinforced aluminum alloys and have found increasing applications in the automotive industry. The wear behavior plays a very important role in DRA composites for such applications. The commonly used apparatus for studying the DRA abrasive wear include pin-on-disk, block-on-ring, and pin-on-drum. The pins or blocks are the composites and the abrasive papers are bonded onto the counter parts. The main drawback of the block-on-ring and pin-on-drum techniques is that the contact area does not remain a constant during the initial testing period. In the pin-on-disk method, the abrasive testing conditions are not easily kept identical either. The abrasive particles are prone to be blunted and smeared by composites when running a single-track test and the sliding speed is not constant when running a spiral-track test. In this study, a modified pin-on-disk apparatus was developed. During the entire testing period, the contact area remains unchanged, and the composite pin can be always abraded y fresh abrasive particles. An aluminum alloy, AA 7075 was reinforced with 20 vol% SiC{sub p} at various particle sizes (82, 59, 37, 16, and 12 {micro}m).
- OSTI ID:
- 413259
- Journal Information:
- Scripta Materialia, Vol. 35, Issue 11; Other Information: PBD: 1 Dec 1996
- Country of Publication:
- United States
- Language:
- English
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